5 This file gives a brief overview of the major changes between each OpenSSL
6 release. For more details please read the CHANGES file.
8 Major changes between OpenSSL 1.1.1t and OpenSSL 1.1.1u [under development]
10 o Fixed documentation of X509_VERIFY_PARAM_add0_policy() (CVE-2023-0466)
11 o Fixed handling of invalid certificate policies in leaf certificates
13 o Limited the number of nodes created in a policy tree ([CVE-2023-0464])
15 Major changes between OpenSSL 1.1.1s and OpenSSL 1.1.1t [7 Feb 2023]
17 o Fixed X.400 address type confusion in X.509 GeneralName (CVE-2023-0286)
18 o Fixed Use-after-free following BIO_new_NDEF (CVE-2023-0215)
19 o Fixed Double free after calling PEM_read_bio_ex (CVE-2022-4450)
20 o Fixed Timing Oracle in RSA Decryption (CVE-2022-4304)
22 Major changes between OpenSSL 1.1.1r and OpenSSL 1.1.1s [1 Nov 2022]
24 o Fixed a regression introduced in OpenSSL 1.1.1r not refreshing the
25 certificate data to be signed before signing the certificate.
27 Major changes between OpenSSL 1.1.1q and OpenSSL 1.1.1r [11 Oct 2022]
29 o Added a missing header for memcmp that caused compilation failure on
32 Major changes between OpenSSL 1.1.1p and OpenSSL 1.1.1q [5 Jul 2022]
34 o Fixed AES OCB failure to encrypt some bytes on 32-bit x86 platforms
37 Major changes between OpenSSL 1.1.1o and OpenSSL 1.1.1p [21 Jun 2022]
39 o Fixed additional bugs in the c_rehash script which was not properly
40 sanitising shell metacharacters to prevent command injection
43 Major changes between OpenSSL 1.1.1n and OpenSSL 1.1.1o [3 May 2022]
45 o Fixed a bug in the c_rehash script which was not properly sanitising
46 shell metacharacters to prevent command injection (CVE-2022-1292)
48 Major changes between OpenSSL 1.1.1m and OpenSSL 1.1.1n [15 Mar 2022]
50 o Fixed a bug in the BN_mod_sqrt() function that can cause it to loop
51 forever for non-prime moduli (CVE-2022-0778)
53 Major changes between OpenSSL 1.1.1l and OpenSSL 1.1.1m [14 Dec 2021]
57 Major changes between OpenSSL 1.1.1k and OpenSSL 1.1.1l [24 Aug 2021]
59 o Fixed an SM2 Decryption Buffer Overflow (CVE-2021-3711)
60 o Fixed various read buffer overruns processing ASN.1 strings (CVE-2021-3712)
62 Major changes between OpenSSL 1.1.1j and OpenSSL 1.1.1k [25 Mar 2021]
64 o Fixed a problem with verifying a certificate chain when using the
65 X509_V_FLAG_X509_STRICT flag (CVE-2021-3450)
66 o Fixed an issue where an OpenSSL TLS server may crash if sent a
67 maliciously crafted renegotiation ClientHello message from a client
70 Major changes between OpenSSL 1.1.1i and OpenSSL 1.1.1j [16 Feb 2021]
72 o Fixed a NULL pointer deref in the X509_issuer_and_serial_hash()
73 function (CVE-2021-23841)
74 o Fixed the RSA_padding_check_SSLv23() function and the RSA_SSLV23_PADDING
75 padding mode to correctly check for rollback attacks
76 o Fixed an overflow in the EVP_CipherUpdate, EVP_EncryptUpdate and
77 EVP_DecryptUpdate functions (CVE-2021-23840)
78 o Fixed SRP_Calc_client_key so that it runs in constant time
80 Major changes between OpenSSL 1.1.1h and OpenSSL 1.1.1i [8 Dec 2020]
82 o Fixed NULL pointer deref in GENERAL_NAME_cmp (CVE-2020-1971)
84 Major changes between OpenSSL 1.1.1g and OpenSSL 1.1.1h [22 Sep 2020]
86 o Disallow explicit curve parameters in verifications chains when
87 X509_V_FLAG_X509_STRICT is used
88 o Enable 'MinProtocol' and 'MaxProtocol' to configure both TLS and DTLS
90 o Oracle Developer Studio will start reporting deprecation warnings
92 Major changes between OpenSSL 1.1.1f and OpenSSL 1.1.1g [21 Apr 2020]
94 o Fixed segmentation fault in SSL_check_chain() (CVE-2020-1967)
96 Major changes between OpenSSL 1.1.1e and OpenSSL 1.1.1f [31 Mar 2020]
98 o Revert the unexpected EOF reporting via SSL_ERROR_SSL
100 Major changes between OpenSSL 1.1.1d and OpenSSL 1.1.1e [17 Mar 2020]
102 o Fixed an overflow bug in the x64_64 Montgomery squaring procedure
103 used in exponentiation with 512-bit moduli (CVE-2019-1551)
104 o Properly detect unexpected EOF while reading in libssl and report
107 Major changes between OpenSSL 1.1.1c and OpenSSL 1.1.1d [10 Sep 2019]
109 o Fixed a fork protection issue (CVE-2019-1549)
110 o Fixed a padding oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey
112 o For built-in EC curves, ensure an EC_GROUP built from the curve name is
113 used even when parsing explicit parameters
114 o Compute ECC cofactors if not provided during EC_GROUP construction
116 o Early start up entropy quality from the DEVRANDOM seed source has been
117 improved for older Linux systems
118 o Correct the extended master secret constant on EBCDIC systems
119 o Use Windows installation paths in the mingw builds (CVE-2019-1552)
120 o Changed DH_check to accept parameters with order q and 2q subgroups
121 o Significantly reduce secure memory usage by the randomness pools
122 o Revert the DEVRANDOM_WAIT feature for Linux systems
124 Major changes between OpenSSL 1.1.1b and OpenSSL 1.1.1c [28 May 2019]
126 o Prevent over long nonces in ChaCha20-Poly1305 (CVE-2019-1543)
128 Major changes between OpenSSL 1.1.1a and OpenSSL 1.1.1b [26 Feb 2019]
130 o Change the info callback signals for the start and end of a post-handshake
131 message exchange in TLSv1.3.
132 o Fix a bug in DTLS over SCTP. This breaks interoperability with older versions
133 of OpenSSL like OpenSSL 1.1.0 and OpenSSL 1.0.2.
135 Major changes between OpenSSL 1.1.1 and OpenSSL 1.1.1a [20 Nov 2018]
137 o Timing vulnerability in DSA signature generation (CVE-2018-0734)
138 o Timing vulnerability in ECDSA signature generation (CVE-2018-0735)
140 Major changes between OpenSSL 1.1.0i and OpenSSL 1.1.1 [11 Sep 2018]
142 o Support for TLSv1.3 added (see https://wiki.openssl.org/index.php/TLS1.3
143 for further important information). The TLSv1.3 implementation includes:
144 o Fully compliant implementation of RFC8446 (TLSv1.3) on by default
146 o Post-handshake authentication and key update
147 o Middlebox Compatibility Mode
149 o Support for all five RFC8446 ciphersuites
150 o RSA-PSS signature algorithms (backported to TLSv1.2)
151 o Configurable session ticket support
152 o Stateless server support
153 o Rewrite of the packet construction code for "safer" packet handling
154 o Rewrite of the extension handling code
155 o Complete rewrite of the OpenSSL random number generator to introduce the
156 following capabilities
157 o The default RAND method now utilizes an AES-CTR DRBG according to
158 NIST standard SP 800-90Ar1.
159 o Support for multiple DRBG instances with seed chaining.
160 o There is a public and private DRBG instance.
161 o The DRBG instances are fork-safe.
162 o Keep all global DRBG instances on the secure heap if it is enabled.
163 o The public and private DRBG instance are per thread for lock free
165 o Support for various new cryptographic algorithms including:
167 o SHA512/224 and SHA512/256
168 o EdDSA (both Ed25519 and Ed448) including X509 and TLS support
169 o X448 (adding to the existing X25519 support in 1.1.0)
175 o ARIA (including TLS support)
176 o Significant Side-Channel attack security improvements
177 o Add a new ClientHello callback to provide the ability to adjust the SSL
178 object at an early stage.
179 o Add 'Maximum Fragment Length' TLS extension negotiation and support
180 o A new STORE module, which implements a uniform and URI based reader of
181 stores that can contain keys, certificates, CRLs and numerous other
183 o Move the display of configuration data to configdata.pm.
184 o Allow GNU style "make variables" to be used with Configure.
185 o Claim the namespaces OSSL and OPENSSL, represented as symbol prefixes
186 o Rewrite of devcrypto engine
188 Major changes between OpenSSL 1.1.0h and OpenSSL 1.1.0i [under development]
190 o Client DoS due to large DH parameter (CVE-2018-0732)
191 o Cache timing vulnerability in RSA Key Generation (CVE-2018-0737)
193 Major changes between OpenSSL 1.1.0g and OpenSSL 1.1.0h [under development]
195 o Constructed ASN.1 types with a recursive definition could exceed the
196 stack (CVE-2018-0739)
197 o Incorrect CRYPTO_memcmp on HP-UX PA-RISC (CVE-2018-0733)
198 o rsaz_1024_mul_avx2 overflow bug on x86_64 (CVE-2017-3738)
200 Major changes between OpenSSL 1.1.0f and OpenSSL 1.1.0g [2 Nov 2017]
202 o bn_sqrx8x_internal carry bug on x86_64 (CVE-2017-3736)
203 o Malformed X.509 IPAddressFamily could cause OOB read (CVE-2017-3735)
205 Major changes between OpenSSL 1.1.0e and OpenSSL 1.1.0f [25 May 2017]
207 o config now recognises 64-bit mingw and chooses mingw64 instead of mingw
209 Major changes between OpenSSL 1.1.0d and OpenSSL 1.1.0e [16 Feb 2017]
211 o Encrypt-Then-Mac renegotiation crash (CVE-2017-3733)
213 Major changes between OpenSSL 1.1.0c and OpenSSL 1.1.0d [26 Jan 2017]
215 o Truncated packet could crash via OOB read (CVE-2017-3731)
216 o Bad (EC)DHE parameters cause a client crash (CVE-2017-3730)
217 o BN_mod_exp may produce incorrect results on x86_64 (CVE-2017-3732)
219 Major changes between OpenSSL 1.1.0b and OpenSSL 1.1.0c [10 Nov 2016]
221 o ChaCha20/Poly1305 heap-buffer-overflow (CVE-2016-7054)
222 o CMS Null dereference (CVE-2016-7053)
223 o Montgomery multiplication may produce incorrect results (CVE-2016-7055)
225 Major changes between OpenSSL 1.1.0a and OpenSSL 1.1.0b [26 Sep 2016]
227 o Fix Use After Free for large message sizes (CVE-2016-6309)
229 Major changes between OpenSSL 1.1.0 and OpenSSL 1.1.0a [22 Sep 2016]
231 o OCSP Status Request extension unbounded memory growth (CVE-2016-6304)
232 o SSL_peek() hang on empty record (CVE-2016-6305)
233 o Excessive allocation of memory in tls_get_message_header()
235 o Excessive allocation of memory in dtls1_preprocess_fragment()
238 Major changes between OpenSSL 1.0.2h and OpenSSL 1.1.0 [25 Aug 2016]
240 o Copyright text was shrunk to a boilerplate that points to the license
241 o "shared" builds are now the default when possible
242 o Added support for "pipelining"
243 o Added the AFALG engine
244 o New threading API implemented
245 o Support for ChaCha20 and Poly1305 added to libcrypto and libssl
246 o Support for extended master secret
248 o Reworked test suite, now based on perl, Test::Harness and Test::More
249 o *Most* libcrypto and libssl public structures were made opaque,
251 BIGNUM and associated types, EC_KEY and EC_KEY_METHOD,
252 DH and DH_METHOD, DSA and DSA_METHOD, RSA and RSA_METHOD,
253 BIO and BIO_METHOD, EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX,
254 EVP_CIPHER, EVP_PKEY and associated types, HMAC_CTX,
255 X509, X509_CRL, X509_OBJECT, X509_STORE_CTX, X509_STORE,
256 X509_LOOKUP, X509_LOOKUP_METHOD
257 o libssl internal structures made opaque
258 o SSLv2 support removed
259 o Kerberos ciphersuite support removed
260 o RC4 removed from DEFAULT ciphersuites in libssl
261 o 40 and 56 bit cipher support removed from libssl
262 o All public header files moved to include/openssl, no more symlinking
263 o SSL/TLS state machine, version negotiation and record layer rewritten
264 o EC revision: now operations use new EC_KEY_METHOD.
265 o Support for OCB mode added to libcrypto
266 o Support for asynchronous crypto operations added to libcrypto and libssl
267 o Deprecated interfaces can now be disabled at build time either
268 relative to the latest release via the "no-deprecated" Configure
269 argument, or via the "--api=1.1.0|1.0.0|0.9.8" option.
270 o Application software can be compiled with -DOPENSSL_API_COMPAT=version
271 to ensure that features deprecated in that version are not exposed.
272 o Support for RFC6698/RFC7671 DANE TLSA peer authentication
273 o Change of Configure to use --prefix as the main installation
274 directory location rather than --openssldir. The latter becomes
275 the directory for certs, private key and openssl.cnf exclusively.
276 o Reworked BIO networking library, with full support for IPv6.
277 o New "unified" build system
278 o New security levels
279 o Support for scrypt algorithm
281 o Extended SSL_CONF support using configuration files
282 o KDF algorithm support. Implement TLS PRF as a KDF.
283 o Support for Certificate Transparency
286 Major changes between OpenSSL 1.0.2g and OpenSSL 1.0.2h [3 May 2016]
288 o Prevent padding oracle in AES-NI CBC MAC check (CVE-2016-2107)
289 o Fix EVP_EncodeUpdate overflow (CVE-2016-2105)
290 o Fix EVP_EncryptUpdate overflow (CVE-2016-2106)
291 o Prevent ASN.1 BIO excessive memory allocation (CVE-2016-2109)
292 o EBCDIC overread (CVE-2016-2176)
293 o Modify behavior of ALPN to invoke callback after SNI/servername
294 callback, such that updates to the SSL_CTX affect ALPN.
295 o Remove LOW from the DEFAULT cipher list. This removes singles DES from
297 o Only remove the SSLv2 methods with the no-ssl2-method option.
299 Major changes between OpenSSL 1.0.2f and OpenSSL 1.0.2g [1 Mar 2016]
301 o Disable weak ciphers in SSLv3 and up in default builds of OpenSSL.
302 o Disable SSLv2 default build, default negotiation and weak ciphers
304 o Fix a double-free in DSA code (CVE-2016-0705)
305 o Disable SRP fake user seed to address a server memory leak
307 o Fix BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption
309 o Fix memory issues in BIO_*printf functions (CVE-2016-0799)
310 o Fix side channel attack on modular exponentiation (CVE-2016-0702)
312 Major changes between OpenSSL 1.0.2e and OpenSSL 1.0.2f [28 Jan 2016]
314 o DH small subgroups (CVE-2016-0701)
315 o SSLv2 doesn't block disabled ciphers (CVE-2015-3197)
317 Major changes between OpenSSL 1.0.2d and OpenSSL 1.0.2e [3 Dec 2015]
319 o BN_mod_exp may produce incorrect results on x86_64 (CVE-2015-3193)
320 o Certificate verify crash with missing PSS parameter (CVE-2015-3194)
321 o X509_ATTRIBUTE memory leak (CVE-2015-3195)
322 o Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs
323 o In DSA_generate_parameters_ex, if the provided seed is too short,
326 Major changes between OpenSSL 1.0.2c and OpenSSL 1.0.2d [9 Jul 2015]
328 o Alternate chains certificate forgery (CVE-2015-1793)
329 o Race condition handling PSK identify hint (CVE-2015-3196)
331 Major changes between OpenSSL 1.0.2b and OpenSSL 1.0.2c [12 Jun 2015]
333 o Fix HMAC ABI incompatibility
335 Major changes between OpenSSL 1.0.2a and OpenSSL 1.0.2b [11 Jun 2015]
337 o Malformed ECParameters causes infinite loop (CVE-2015-1788)
338 o Exploitable out-of-bounds read in X509_cmp_time (CVE-2015-1789)
339 o PKCS7 crash with missing EnvelopedContent (CVE-2015-1790)
340 o CMS verify infinite loop with unknown hash function (CVE-2015-1792)
341 o Race condition handling NewSessionTicket (CVE-2015-1791)
343 Major changes between OpenSSL 1.0.2 and OpenSSL 1.0.2a [19 Mar 2015]
345 o OpenSSL 1.0.2 ClientHello sigalgs DoS fix (CVE-2015-0291)
346 o Multiblock corrupted pointer fix (CVE-2015-0290)
347 o Segmentation fault in DTLSv1_listen fix (CVE-2015-0207)
348 o Segmentation fault in ASN1_TYPE_cmp fix (CVE-2015-0286)
349 o Segmentation fault for invalid PSS parameters fix (CVE-2015-0208)
350 o ASN.1 structure reuse memory corruption fix (CVE-2015-0287)
351 o PKCS7 NULL pointer dereferences fix (CVE-2015-0289)
352 o DoS via reachable assert in SSLv2 servers fix (CVE-2015-0293)
353 o Empty CKE with client auth and DHE fix (CVE-2015-1787)
354 o Handshake with unseeded PRNG fix (CVE-2015-0285)
355 o Use After Free following d2i_ECPrivatekey error fix (CVE-2015-0209)
356 o X509_to_X509_REQ NULL pointer deref fix (CVE-2015-0288)
357 o Removed the export ciphers from the DEFAULT ciphers
359 Major changes between OpenSSL 1.0.1l and OpenSSL 1.0.2 [22 Jan 2015]:
361 o Suite B support for TLS 1.2 and DTLS 1.2
362 o Support for DTLS 1.2
363 o TLS automatic EC curve selection.
364 o API to set TLS supported signature algorithms and curves
365 o SSL_CONF configuration API.
366 o TLS Brainpool support.
368 o CMS support for RSA-PSS, RSA-OAEP, ECDH and X9.42 DH.
370 Major changes between OpenSSL 1.0.1k and OpenSSL 1.0.1l [15 Jan 2015]
372 o Build fixes for the Windows and OpenVMS platforms
374 Major changes between OpenSSL 1.0.1j and OpenSSL 1.0.1k [8 Jan 2015]
376 o Fix for CVE-2014-3571
377 o Fix for CVE-2015-0206
378 o Fix for CVE-2014-3569
379 o Fix for CVE-2014-3572
380 o Fix for CVE-2015-0204
381 o Fix for CVE-2015-0205
382 o Fix for CVE-2014-8275
383 o Fix for CVE-2014-3570
385 Major changes between OpenSSL 1.0.1i and OpenSSL 1.0.1j [15 Oct 2014]
387 o Fix for CVE-2014-3513
388 o Fix for CVE-2014-3567
389 o Mitigation for CVE-2014-3566 (SSL protocol vulnerability)
390 o Fix for CVE-2014-3568
392 Major changes between OpenSSL 1.0.1h and OpenSSL 1.0.1i [6 Aug 2014]
394 o Fix for CVE-2014-3512
395 o Fix for CVE-2014-3511
396 o Fix for CVE-2014-3510
397 o Fix for CVE-2014-3507
398 o Fix for CVE-2014-3506
399 o Fix for CVE-2014-3505
400 o Fix for CVE-2014-3509
401 o Fix for CVE-2014-5139
402 o Fix for CVE-2014-3508
404 Major changes between OpenSSL 1.0.1g and OpenSSL 1.0.1h [5 Jun 2014]
406 o Fix for CVE-2014-0224
407 o Fix for CVE-2014-0221
408 o Fix for CVE-2014-0198
409 o Fix for CVE-2014-0195
410 o Fix for CVE-2014-3470
411 o Fix for CVE-2010-5298
413 Major changes between OpenSSL 1.0.1f and OpenSSL 1.0.1g [7 Apr 2014]
415 o Fix for CVE-2014-0160
416 o Add TLS padding extension workaround for broken servers.
417 o Fix for CVE-2014-0076
419 Major changes between OpenSSL 1.0.1e and OpenSSL 1.0.1f [6 Jan 2014]
421 o Don't include gmt_unix_time in TLS server and client random values
422 o Fix for TLS record tampering bug CVE-2013-4353
423 o Fix for TLS version checking bug CVE-2013-6449
424 o Fix for DTLS retransmission bug CVE-2013-6450
426 Major changes between OpenSSL 1.0.1d and OpenSSL 1.0.1e [11 Feb 2013]:
428 o Corrected fix for CVE-2013-0169
430 Major changes between OpenSSL 1.0.1c and OpenSSL 1.0.1d [4 Feb 2013]:
432 o Fix renegotiation in TLS 1.1, 1.2 by using the correct TLS version.
433 o Include the fips configuration module.
434 o Fix OCSP bad key DoS attack CVE-2013-0166
435 o Fix for SSL/TLS/DTLS CBC plaintext recovery attack CVE-2013-0169
436 o Fix for TLS AESNI record handling flaw CVE-2012-2686
438 Major changes between OpenSSL 1.0.1b and OpenSSL 1.0.1c [10 May 2012]:
440 o Fix TLS/DTLS record length checking bug CVE-2012-2333
441 o Don't attempt to use non-FIPS composite ciphers in FIPS mode.
443 Major changes between OpenSSL 1.0.1a and OpenSSL 1.0.1b [26 Apr 2012]:
445 o Fix compilation error on non-x86 platforms.
446 o Make FIPS capable OpenSSL ciphers work in non-FIPS mode.
447 o Fix SSL_OP_NO_TLSv1_1 clash with SSL_OP_ALL in OpenSSL 1.0.0
449 Major changes between OpenSSL 1.0.1 and OpenSSL 1.0.1a [19 Apr 2012]:
451 o Fix for ASN1 overflow bug CVE-2012-2110
452 o Workarounds for some servers that hang on long client hellos.
453 o Fix SEGV in AES code.
455 Major changes between OpenSSL 1.0.0h and OpenSSL 1.0.1 [14 Mar 2012]:
457 o TLS/DTLS heartbeat support.
459 o RFC 5705 TLS key material exporter.
460 o RFC 5764 DTLS-SRTP negotiation.
461 o Next Protocol Negotiation.
462 o PSS signatures in certificates, requests and CRLs.
463 o Support for password based recipient info for CMS.
464 o Support TLS v1.2 and TLS v1.1.
465 o Preliminary FIPS capability for unvalidated 2.0 FIPS module.
468 Major changes between OpenSSL 1.0.0g and OpenSSL 1.0.0h [12 Mar 2012]:
470 o Fix for CMS/PKCS#7 MMA CVE-2012-0884
471 o Corrected fix for CVE-2011-4619
472 o Various DTLS fixes.
474 Major changes between OpenSSL 1.0.0f and OpenSSL 1.0.0g [18 Jan 2012]:
476 o Fix for DTLS DoS issue CVE-2012-0050
478 Major changes between OpenSSL 1.0.0e and OpenSSL 1.0.0f [4 Jan 2012]:
480 o Fix for DTLS plaintext recovery attack CVE-2011-4108
481 o Clear block padding bytes of SSL 3.0 records CVE-2011-4576
482 o Only allow one SGC handshake restart for SSL/TLS CVE-2011-4619
483 o Check parameters are not NULL in GOST ENGINE CVE-2012-0027
484 o Check for malformed RFC3779 data CVE-2011-4577
486 Major changes between OpenSSL 1.0.0d and OpenSSL 1.0.0e [6 Sep 2011]:
488 o Fix for CRL vulnerability issue CVE-2011-3207
489 o Fix for ECDH crashes CVE-2011-3210
490 o Protection against EC timing attacks.
491 o Support ECDH ciphersuites for certificates using SHA2 algorithms.
492 o Various DTLS fixes.
494 Major changes between OpenSSL 1.0.0c and OpenSSL 1.0.0d [8 Feb 2011]:
496 o Fix for security issue CVE-2011-0014
498 Major changes between OpenSSL 1.0.0b and OpenSSL 1.0.0c [2 Dec 2010]:
500 o Fix for security issue CVE-2010-4180
501 o Fix for CVE-2010-4252
502 o Fix mishandling of absent EC point format extension.
503 o Fix various platform compilation issues.
504 o Corrected fix for security issue CVE-2010-3864.
506 Major changes between OpenSSL 1.0.0a and OpenSSL 1.0.0b [16 Nov 2010]:
508 o Fix for security issue CVE-2010-3864.
509 o Fix for CVE-2010-2939
510 o Fix WIN32 build system for GOST ENGINE.
512 Major changes between OpenSSL 1.0.0 and OpenSSL 1.0.0a [1 Jun 2010]:
514 o Fix for security issue CVE-2010-1633.
515 o GOST MAC and CFB fixes.
517 Major changes between OpenSSL 0.9.8n and OpenSSL 1.0.0 [29 Mar 2010]:
519 o RFC3280 path validation: sufficient to process PKITS tests.
520 o Integrated support for PVK files and keyblobs.
521 o Change default private key format to PKCS#8.
522 o CMS support: able to process all examples in RFC4134
523 o Streaming ASN1 encode support for PKCS#7 and CMS.
524 o Multiple signer and signer add support for PKCS#7 and CMS.
525 o ASN1 printing support.
526 o Whirlpool hash algorithm added.
527 o RFC3161 time stamp support.
528 o New generalised public key API supporting ENGINE based algorithms.
529 o New generalised public key API utilities.
530 o New ENGINE supporting GOST algorithms.
531 o SSL/TLS GOST ciphersuite support.
532 o PKCS#7 and CMS GOST support.
533 o RFC4279 PSK ciphersuite support.
534 o Supported points format extension for ECC ciphersuites.
535 o ecdsa-with-SHA224/256/384/512 signature types.
536 o dsa-with-SHA224 and dsa-with-SHA256 signature types.
537 o Opaque PRF Input TLS extension support.
538 o Updated time routines to avoid OS limitations.
540 Major changes between OpenSSL 0.9.8m and OpenSSL 0.9.8n [24 Mar 2010]:
542 o CFB cipher definition fixes.
543 o Fix security issues CVE-2010-0740 and CVE-2010-0433.
545 Major changes between OpenSSL 0.9.8l and OpenSSL 0.9.8m [25 Feb 2010]:
547 o Cipher definition fixes.
548 o Workaround for slow RAND_poll() on some WIN32 versions.
549 o Remove MD2 from algorithm tables.
550 o SPKAC handling fixes.
551 o Support for RFC5746 TLS renegotiation extension.
552 o Compression memory leak fixed.
553 o Compression session resumption fixed.
554 o Ticket and SNI coexistence fixes.
555 o Many fixes to DTLS handling.
557 Major changes between OpenSSL 0.9.8k and OpenSSL 0.9.8l [5 Nov 2009]:
559 o Temporary work around for CVE-2009-3555: disable renegotiation.
561 Major changes between OpenSSL 0.9.8j and OpenSSL 0.9.8k [25 Mar 2009]:
563 o Fix various build issues.
564 o Fix security issues (CVE-2009-0590, CVE-2009-0591, CVE-2009-0789)
566 Major changes between OpenSSL 0.9.8i and OpenSSL 0.9.8j [7 Jan 2009]:
568 o Fix security issue (CVE-2008-5077)
569 o Merge FIPS 140-2 branch code.
571 Major changes between OpenSSL 0.9.8g and OpenSSL 0.9.8h [28 May 2008]:
573 o CryptoAPI ENGINE support.
574 o Various precautionary measures.
575 o Fix for bugs affecting certificate request creation.
576 o Support for local machine keyset attribute in PKCS#12 files.
578 Major changes between OpenSSL 0.9.8f and OpenSSL 0.9.8g [19 Oct 2007]:
580 o Backport of CMS functionality to 0.9.8.
581 o Fixes for bugs introduced with 0.9.8f.
583 Major changes between OpenSSL 0.9.8e and OpenSSL 0.9.8f [11 Oct 2007]:
585 o Add gcc 4.2 support.
586 o Add support for AES and SSE2 assembly language optimization
588 o Support for RFC4507bis and server name extensions if explicitly
589 selected at compile time.
591 o RFC4507bis support.
592 o TLS Extensions support.
594 Major changes between OpenSSL 0.9.8d and OpenSSL 0.9.8e [23 Feb 2007]:
596 o Various ciphersuite selection fixes.
599 Major changes between OpenSSL 0.9.8c and OpenSSL 0.9.8d [28 Sep 2006]:
601 o Introduce limits to prevent malicious key DoS (CVE-2006-2940)
602 o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
603 o Changes to ciphersuite selection algorithm
605 Major changes between OpenSSL 0.9.8b and OpenSSL 0.9.8c [5 Sep 2006]:
607 o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
608 o New cipher Camellia
610 Major changes between OpenSSL 0.9.8a and OpenSSL 0.9.8b [4 May 2006]:
612 o Cipher string fixes.
613 o Fixes for VC++ 2005.
614 o Updated ECC cipher suite support.
615 o New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free().
616 o Zlib compression usage fixes.
617 o Built in dynamic engine compilation support on Win32.
618 o Fixes auto dynamic engine loading in Win32.
620 Major changes between OpenSSL 0.9.8 and OpenSSL 0.9.8a [11 Oct 2005]:
622 o Fix potential SSL 2.0 rollback, CVE-2005-2969
623 o Extended Windows CE support
625 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.8 [5 Jul 2005]:
627 o Major work on the BIGNUM library for higher efficiency and to
628 make operations more streamlined and less contradictory. This
629 is the result of a major audit of the BIGNUM library.
630 o Addition of BIGNUM functions for fields GF(2^m) and NIST
631 curves, to support the Elliptic Crypto functions.
632 o Major work on Elliptic Crypto; ECDH and ECDSA added, including
633 the use through EVP, X509 and ENGINE.
634 o New ASN.1 mini-compiler that's usable through the OpenSSL
636 o Added support for ASN.1 indefinite length constructed encoding.
637 o New PKCS#12 'medium level' API to manipulate PKCS#12 files.
638 o Complete rework of shared library construction and linking
639 programs with shared or static libraries, through a separate
641 o Rework of the passing of parameters from one Makefile to another.
642 o Changed ENGINE framework to load dynamic engine modules
643 automatically from specifically given directories.
644 o New structure and ASN.1 functions for CertificatePair.
645 o Changed the ZLIB compression method to be stateful.
646 o Changed the key-generation and primality testing "progress"
647 mechanism to take a structure that contains the ticker
648 function and an argument.
649 o New engine module: GMP (performs private key exponentiation).
650 o New engine module: VIA PadLOck ACE extension in VIA C3
652 o Added support for IPv6 addresses in certificate extensions.
653 See RFC 1884, section 2.2.
654 o Added support for certificate policy mappings, policy
655 constraints and name constraints.
656 o Added support for multi-valued AVAs in the OpenSSL
658 o Added support for multiple certificates with the same subject
659 in the 'openssl ca' index file.
660 o Make it possible to create self-signed certificates using
661 'openssl ca -selfsign'.
662 o Make it possible to generate a serial number file with
663 'openssl ca -create_serial'.
664 o New binary search functions with extended functionality.
666 o New STORE structure and library to provide an interface to all
667 sorts of data repositories. Supports storage of public and
668 private keys, certificates, CRLs, numbers and arbitrary blobs.
669 This library is unfortunately unfinished and unused within
671 o New control functions for the error stack.
672 o Changed the PKCS#7 library to support one-pass S/MIME
674 o Added the possibility to compile without old deprecated
675 functionality with the OPENSSL_NO_DEPRECATED macro or the
676 'no-deprecated' argument to the config and Configure scripts.
677 o Constification of all ASN.1 conversion functions, and other
679 o Improved platform support for PowerPC.
680 o New FIPS 180-2 algorithms (SHA-224, -256, -384 and -512).
681 o New X509_VERIFY_PARAM structure to support parameterisation
682 of X.509 path validation.
683 o Major overhaul of RC4 performance on Intel P4, IA-64 and
685 o Changed the Configure script to have some algorithms disabled
686 by default. Those can be explicitly enabled with the new
687 argument form 'enable-xxx'.
688 o Change the default digest in 'openssl' commands from MD5 to
690 o Added support for DTLS.
691 o New BIGNUM blinding.
692 o Added support for the RSA-PSS encryption scheme
693 o Added support for the RSA X.931 padding.
694 o Added support for BSD sockets on NetWare.
695 o Added support for files larger than 2GB.
696 o Added initial support for Win64.
697 o Added alternate pkg-config files.
699 Major changes between OpenSSL 0.9.7l and OpenSSL 0.9.7m [23 Feb 2007]:
701 o FIPS 1.1.1 module linking.
702 o Various ciphersuite selection fixes.
704 Major changes between OpenSSL 0.9.7k and OpenSSL 0.9.7l [28 Sep 2006]:
706 o Introduce limits to prevent malicious key DoS (CVE-2006-2940)
707 o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
709 Major changes between OpenSSL 0.9.7j and OpenSSL 0.9.7k [5 Sep 2006]:
711 o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
713 Major changes between OpenSSL 0.9.7i and OpenSSL 0.9.7j [4 May 2006]:
715 o Visual C++ 2005 fixes.
716 o Update Windows build system for FIPS.
718 Major changes between OpenSSL 0.9.7h and OpenSSL 0.9.7i [14 Oct 2005]:
720 o Give EVP_MAX_MD_SIZE its old value, except for a FIPS build.
722 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.7h [11 Oct 2005]:
724 o Fix SSL 2.0 Rollback, CVE-2005-2969
725 o Allow use of fixed-length exponent on DSA signing
726 o Default fixed-window RSA, DSA, DH private-key operations
728 Major changes between OpenSSL 0.9.7f and OpenSSL 0.9.7g [11 Apr 2005]:
730 o More compilation issues fixed.
731 o Adaptation to more modern Kerberos API.
732 o Enhanced or corrected configuration for Solaris64, Mingw and Cygwin.
733 o Enhanced x86_64 assembler BIGNUM module.
734 o More constification.
735 o Added processing of proxy certificates (RFC 3820).
737 Major changes between OpenSSL 0.9.7e and OpenSSL 0.9.7f [22 Mar 2005]:
739 o Several compilation issues fixed.
740 o Many memory allocation failure checks added.
741 o Improved comparison of X509 Name type.
742 o Mandatory basic checks on certificates.
743 o Performance improvements.
745 Major changes between OpenSSL 0.9.7d and OpenSSL 0.9.7e [25 Oct 2004]:
747 o Fix race condition in CRL checking code.
748 o Fixes to PKCS#7 (S/MIME) code.
750 Major changes between OpenSSL 0.9.7c and OpenSSL 0.9.7d [17 Mar 2004]:
752 o Security: Fix Kerberos ciphersuite SSL/TLS handshaking bug
753 o Security: Fix null-pointer assignment in do_change_cipher_spec()
754 o Allow multiple active certificates with same subject in CA index
755 o Multiple X509 verification fixes
756 o Speed up HMAC and other operations
758 Major changes between OpenSSL 0.9.7b and OpenSSL 0.9.7c [30 Sep 2003]:
760 o Security: fix various ASN1 parsing bugs.
761 o New -ignore_err option to OCSP utility.
762 o Various interop and bug fixes in S/MIME code.
763 o SSL/TLS protocol fix for unrequested client certificates.
765 Major changes between OpenSSL 0.9.7a and OpenSSL 0.9.7b [10 Apr 2003]:
767 o Security: counter the Klima-Pokorny-Rosa extension of
768 Bleichbacher's attack
769 o Security: make RSA blinding default.
770 o Configuration: Irix fixes, AIX fixes, better mingw support.
771 o Support for new platforms: linux-ia64-ecc.
772 o Build: shared library support fixes.
773 o ASN.1: treat domainComponent correctly.
774 o Documentation: fixes and additions.
776 Major changes between OpenSSL 0.9.7 and OpenSSL 0.9.7a [19 Feb 2003]:
778 o Security: Important security related bugfixes.
779 o Enhanced compatibility with MIT Kerberos.
780 o Can be built without the ENGINE framework.
781 o IA32 assembler enhancements.
782 o Support for new platforms: FreeBSD/IA64 and FreeBSD/Sparc64.
783 o Configuration: the no-err option now works properly.
784 o SSL/TLS: now handles manual certificate chain building.
785 o SSL/TLS: certain session ID malfunctions corrected.
787 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.7 [30 Dec 2002]:
789 o New library section OCSP.
790 o Complete rewrite of ASN1 code.
791 o CRL checking in verify code and openssl utility.
792 o Extension copying in 'ca' utility.
793 o Flexible display options in 'ca' utility.
794 o Provisional support for international characters with UTF8.
795 o Support for external crypto devices ('engine') is no longer
796 a separate distribution.
797 o New elliptic curve library section.
798 o New AES (Rijndael) library section.
799 o Support for new platforms: Windows CE, Tandem OSS, A/UX, AIX 64-bit,
800 Linux x86_64, Linux 64-bit on Sparc v9
801 o Extended support for some platforms: VxWorks
802 o Enhanced support for shared libraries.
803 o Now only builds PIC code when shared library support is requested.
804 o Support for pkg-config.
805 o Lots of new manuals.
806 o Makes symbolic links to or copies of manuals to cover all described
808 o Change DES API to clean up the namespace (some applications link also
809 against libdes providing similar functions having the same name).
810 Provide macros for backward compatibility (will be removed in the
812 o Unify handling of cryptographic algorithms (software and engine)
813 to be available via EVP routines for asymmetric and symmetric ciphers.
814 o NCONF: new configuration handling routines.
815 o Change API to use more 'const' modifiers to improve error checking
817 o Finally remove references to RSAref.
818 o Reworked parts of the BIGNUM code.
819 o Support for new engines: Broadcom ubsec, Accelerated Encryption
820 Processing, IBM 4758.
821 o A few new engines added in the demos area.
822 o Extended and corrected OID (object identifier) table.
823 o PRNG: query at more locations for a random device, automatic query for
824 EGD style random sources at several locations.
825 o SSL/TLS: allow optional cipher choice according to server's preference.
826 o SSL/TLS: allow server to explicitly set new session ids.
827 o SSL/TLS: support Kerberos cipher suites (RFC2712).
828 Only supports MIT Kerberos for now.
829 o SSL/TLS: allow more precise control of renegotiations and sessions.
830 o SSL/TLS: add callback to retrieve SSL/TLS messages.
831 o SSL/TLS: support AES cipher suites (RFC3268).
833 Major changes between OpenSSL 0.9.6j and OpenSSL 0.9.6k [30 Sep 2003]:
835 o Security: fix various ASN1 parsing bugs.
836 o SSL/TLS protocol fix for unrequested client certificates.
838 Major changes between OpenSSL 0.9.6i and OpenSSL 0.9.6j [10 Apr 2003]:
840 o Security: counter the Klima-Pokorny-Rosa extension of
841 Bleichbacher's attack
842 o Security: make RSA blinding default.
843 o Build: shared library support fixes.
845 Major changes between OpenSSL 0.9.6h and OpenSSL 0.9.6i [19 Feb 2003]:
847 o Important security related bugfixes.
849 Major changes between OpenSSL 0.9.6g and OpenSSL 0.9.6h [5 Dec 2002]:
851 o New configuration targets for Tandem OSS and A/UX.
852 o New OIDs for Microsoft attributes.
853 o Better handling of SSL session caching.
854 o Better comparison of distinguished names.
855 o Better handling of shared libraries in a mixed GNU/non-GNU environment.
856 o Support assembler code with Borland C.
857 o Fixes for length problems.
858 o Fixes for uninitialised variables.
859 o Fixes for memory leaks, some unusual crashes and some race conditions.
860 o Fixes for smaller building problems.
861 o Updates of manuals, FAQ and other instructive documents.
863 Major changes between OpenSSL 0.9.6f and OpenSSL 0.9.6g [9 Aug 2002]:
865 o Important building fixes on Unix.
867 Major changes between OpenSSL 0.9.6e and OpenSSL 0.9.6f [8 Aug 2002]:
869 o Various important bugfixes.
871 Major changes between OpenSSL 0.9.6d and OpenSSL 0.9.6e [30 Jul 2002]:
873 o Important security related bugfixes.
874 o Various SSL/TLS library bugfixes.
876 Major changes between OpenSSL 0.9.6c and OpenSSL 0.9.6d [9 May 2002]:
878 o Various SSL/TLS library bugfixes.
879 o Fix DH parameter generation for 'non-standard' generators.
881 Major changes between OpenSSL 0.9.6b and OpenSSL 0.9.6c [21 Dec 2001]:
883 o Various SSL/TLS library bugfixes.
884 o BIGNUM library fixes.
885 o RSA OAEP and random number generation fixes.
886 o Object identifiers corrected and added.
887 o Add assembler BN routines for IA64.
888 o Add support for OS/390 Unix, UnixWare with gcc, OpenUNIX 8,
889 MIPS Linux; shared library support for Irix, HP-UX.
890 o Add crypto accelerator support for AEP, Baltimore SureWare,
891 Broadcom and Cryptographic Appliance's keyserver
892 [in 0.9.6c-engine release].
894 Major changes between OpenSSL 0.9.6a and OpenSSL 0.9.6b [9 Jul 2001]:
896 o Security fix: PRNG improvements.
897 o Security fix: RSA OAEP check.
898 o Security fix: Reinsert and fix countermeasure to Bleichbacher's
900 o MIPS bug fix in BIGNUM.
901 o Bug fix in "openssl enc".
902 o Bug fix in X.509 printing routine.
903 o Bug fix in DSA verification routine and DSA S/MIME verification.
904 o Bug fix to make PRNG thread-safe.
905 o Bug fix in RAND_file_name().
906 o Bug fix in compatibility mode trust settings.
907 o Bug fix in blowfish EVP.
908 o Increase default size for BIO buffering filter.
909 o Compatibility fixes in some scripts.
911 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.6a [5 Apr 2001]:
913 o Security fix: change behavior of OpenSSL to avoid using
914 environment variables when running as root.
915 o Security fix: check the result of RSA-CRT to reduce the
916 possibility of deducing the private key from an incorrectly
917 calculated signature.
918 o Security fix: prevent Bleichenbacher's DSA attack.
919 o Security fix: Zero the premaster secret after deriving the
920 master secret in DH ciphersuites.
921 o Reimplement SSL_peek(), which had various problems.
922 o Compatibility fix: the function des_encrypt() renamed to
923 des_encrypt1() to avoid clashes with some Unixen libc.
924 o Bug fixes for Win32, HP/UX and Irix.
925 o Bug fixes in BIGNUM, SSL, PKCS#7, PKCS#12, X.509, CONF and
926 memory checking routines.
927 o Bug fixes for RSA operations in threaded environments.
928 o Bug fixes in misc. openssl applications.
929 o Remove a few potential memory leaks.
930 o Add tighter checks of BIGNUM routines.
931 o Shared library support has been reworked for generality.
932 o More documentation.
933 o New function BN_rand_range().
934 o Add "-rand" option to openssl s_client and s_server.
936 Major changes between OpenSSL 0.9.5a and OpenSSL 0.9.6 [10 Oct 2000]:
938 o Some documentation for BIO and SSL libraries.
939 o Enhanced chain verification using key identifiers.
940 o New sign and verify options to 'dgst' application.
941 o Support for DER and PEM encoded messages in 'smime' application.
942 o New 'rsautl' application, low level RSA utility.
944 o Bugfix for SSL rollback padding check.
945 o Support for external crypto devices [1].
946 o Enhanced EVP interface.
948 [1] The support for external crypto devices is currently a separate
949 distribution. See the file README.ENGINE.
951 Major changes between OpenSSL 0.9.5 and OpenSSL 0.9.5a [1 Apr 2000]:
953 o Bug fixes for Win32, SuSE Linux, NeXTSTEP and FreeBSD 2.2.8
954 o Shared library support for HPUX and Solaris-gcc
955 o Support of Linux/IA64
956 o Assembler support for Mingw32
957 o New 'rand' application
958 o New way to check for existence of algorithms from scripts
960 Major changes between OpenSSL 0.9.4 and OpenSSL 0.9.5 [25 May 2000]:
962 o S/MIME support in new 'smime' command
963 o Documentation for the OpenSSL command line application
964 o Automation of 'req' application
965 o Fixes to make s_client, s_server work under Windows
966 o Support for multiple fieldnames in SPKACs
967 o New SPKAC command line utility and associated library functions
968 o Options to allow passwords to be obtained from various sources
969 o New public key PEM format and options to handle it
970 o Many other fixes and enhancements to command line utilities
971 o Usable certificate chain verification
972 o Certificate purpose checking
973 o Certificate trust settings
974 o Support of authority information access extension
975 o Extensions in certificate requests
976 o Simplified X509 name and attribute routines
977 o Initial (incomplete) support for international character sets
978 o New DH_METHOD, DSA_METHOD and enhanced RSA_METHOD
979 o Read only memory BIOs and simplified creation function
980 o TLS/SSL protocol bugfixes: Accept TLS 'client hello' in SSL 3.0
981 record; allow fragmentation and interleaving of handshake and other
983 o TLS/SSL code now "tolerates" MS SGC
984 o Work around for Netscape client certificate hang bug
985 o RSA_NULL option that removes RSA patent code but keeps other
987 o Memory leak detection now allows applications to add extra information
988 via a per-thread stack
989 o PRNG robustness improved
991 o BIGNUM library bug fixes
992 o Faster DSA parameter generation
993 o Enhanced support for Alpha Linux
994 o Experimental MacOS support
996 Major changes between OpenSSL 0.9.3 and OpenSSL 0.9.4 [9 Aug 1999]:
998 o Transparent support for PKCS#8 format private keys: these are used
999 by several software packages and are more secure than the standard
1001 o PKCS#5 v2.0 implementation
1002 o Password callbacks have a new void * argument for application data
1003 o Avoid various memory leaks
1004 o New pipe-like BIO that allows using the SSL library when actual I/O
1005 must be handled by the application (BIO pair)
1007 Major changes between OpenSSL 0.9.2b and OpenSSL 0.9.3 [24 May 1999]:
1008 o Lots of enhancements and cleanups to the Configuration mechanism
1009 o RSA OEAP related fixes
1010 o Added `openssl ca -revoke' option for revoking a certificate
1011 o Source cleanups: const correctness, type-safe stacks and ASN.1 SETs
1012 o Source tree cleanups: removed lots of obsolete files
1013 o Thawte SXNet, certificate policies and CRL distribution points
1015 o Preliminary (experimental) S/MIME support
1016 o Support for ASN.1 UTF8String and VisibleString
1017 o Full integration of PKCS#12 code
1018 o Sparc assembler bignum implementation, optimized hash functions
1019 o Option to disable selected ciphers
1021 Major changes between OpenSSL 0.9.1c and OpenSSL 0.9.2b [22 Mar 1999]:
1022 o Fixed a security hole related to session resumption
1023 o Fixed RSA encryption routines for the p < q case
1024 o "ALL" in cipher lists now means "everything except NULL ciphers"
1025 o Support for Triple-DES CBCM cipher
1026 o Support of Optimal Asymmetric Encryption Padding (OAEP) for RSA
1027 o First support for new TLSv1 ciphers
1028 o Added a few new BIOs (syslog BIO, reliable BIO)
1029 o Extended support for DSA certificate/keys.
1030 o Extended support for Certificate Signing Requests (CSR)
1031 o Initial support for X.509v3 extensions
1032 o Extended support for compression inside the SSL record layer
1033 o Overhauled Win32 builds
1034 o Cleanups and fixes to the Big Number (BN) library
1035 o Support for ASN.1 GeneralizedTime
1036 o Splitted ASN.1 SETs from SEQUENCEs
1037 o ASN1 and PEM support for Netscape Certificate Sequences
1038 o Overhauled Perl interface
1039 o Lots of source tree cleanups.
1040 o Lots of memory leak fixes.
1041 o Lots of bug fixes.
1043 Major changes between SSLeay 0.9.0b and OpenSSL 0.9.1c [23 Dec 1998]:
1044 o Integration of the popular NO_RSA/NO_DSA patches
1045 o Initial support for compression inside the SSL record layer
1046 o Added BIO proxy and filtering functionality
1047 o Extended Big Number (BN) library
1048 o Added RIPE MD160 message digest
1049 o Added support for RC2/64bit cipher
1050 o Extended ASN.1 parser routines
1051 o Adjustments of the source tree for CVS
1052 o Support for various new platforms