OpenSSL CHANGES
===============
-This is a high-level summary of the most important changes.
-For a full list of changes, see the [git commit log][log] and
-pick the appropriate release branch.
+This is a detailed breakdown of significant changes. For a high-level overview
+of changes in each release, see [NEWS.md](./NEWS.md).
+
+For a full list of changes, see the [git commit log][log] and pick the
+appropriate release branch.
[log]: https://github.com/openssl/openssl/commits/
OpenSSL Releases
----------------
+ - [OpenSSL 3.4](#openssl-34)
+ - [OpenSSL 3.3](#openssl-33)
- [OpenSSL 3.2](#openssl-32)
- [OpenSSL 3.1](#openssl-31)
- [OpenSSL 3.0](#openssl-30)
- [OpenSSL 1.0.0](#openssl-100)
- [OpenSSL 0.9.x](#openssl-09x)
+OpenSSL 3.4
+-----------
+
+### Changes between 3.3 and 3.4 [xx XXX xxxx]
+
+ * Added options `-not_before` and `-not_after` for explicit setting
+ start and end dates of certificates created with the `req` and `x509`
+ apps. Added the same options also to `ca` app as alias for
+ `-startdate` and `-enddate` options.
+
+ *Stephan Wurm*
+
+ * The X25519 and X448 key exchange implementation in the FIPS provider
+ is unapproved and has `fips=no` property.
+
+ * Tomas Mraz*
+
+ * Use an empty renegotiate extension in TLS client hellos instead of
+ the empty renegotiation SCSV, for all connections with a minimum TLS
+ version > 1.0.
+
+ *Tim Perry*
+
+ * Added support for requesting CRL in CMP.
+
+ This work was sponsored by Siemens AG.
+
+ *Rajeev Ranjan*
+
+ * Added Attribute Certificate (RFC 5755) support. Attribute
+ Certificates can be created, parsed, modified and printed via the
+ public API. There is no command-line tool support at this time.
+
+ *Damian Hobson-Garcia*
+
+OpenSSL 3.3
+-----------
+
+### Changes between 3.2 and 3.3 [xx XXX xxxx]
+
+ * The `-verify` option to the `openssl crl` and `openssl req` will make
+ the program exit with 1 on failure.
+
+ *Vladimír Kotal*
+
+ * The BIO_get_new_index() function can only be called 127 times before it
+ reaches its upper bound of BIO_TYPE_MASK. It will now correctly return an
+ error of -1 once it is exhausted. Users may need to reserve using this
+ function for cases where BIO_find_type() is required. Either BIO_TYPE_NONE
+ or BIO_get_new_index() can be used to supply a type to BIO_meth_new().
+
+ *Shane Lontis*
+
+ * Added API functions SSL_SESSION_get_time_ex(), SSL_SESSION_set_time_ex()
+ using time_t which is Y2038 safe on 32 bit systems when 64 bit time
+ is enabled (e.g via setting glibc macro _TIME_BITS=64).
+
+ *Ijtaba Hussain*
+
+ * The d2i_ASN1_GENERALIZEDTIME(), d2i_ASN1_UTCTIME(), ASN1_TIME_check(), and
+ related functions have been augmented to check for a minimum length of
+ the input string, in accordance with ITU-T X.690 section 11.7 and 11.8.
+
+ *Job Snijders*
+
+ * Unknown entries in TLS SignatureAlgorithms, ClientSignatureAlgorithms
+ config options and the respective calls to SSL[_CTX]_set1_sigalgs() and
+ SSL[_CTX]_set1_client_sigalgs() that start with `?` character are
+ ignored and the configuration will still be used.
+
+ Similarly unknown entries that start with `?` character in a TLS
+ Groups config option or set with SSL[_CTX]_set1_groups_list() are ignored
+ and the configuration will still be used.
+
+ In both cases if the resulting list is empty, an error is returned.
+
+ *Tomáš Mráz*
+
+ * The EVP_PKEY_fromdata function has been augmented to allow for the derivation
+ of CRT (Chinese Remainder Theorem) parameters when requested. See the
+ OSSL_PKEY_PARAM_RSA_DERIVE_FROM_PQ param in the EVP_PKEY-RSA documentation.
+
+ *Neil Horman*
+
+ * The activate and soft_load configuration settings for providers in
+ openssl.cnf have been updated to require a value of [1|yes|true|on]
+ (in lower or UPPER case) to enable the setting. Conversely a value
+ of [0|no|false|off] will disable the setting. All other values, or the
+ omission of a value for these settings will result in an error.
+
+ *Neil Horman*
+
+ * Added `-set_issuer` and `-set_subject` options to `openssl x509` to
+ override the Issuer and Subject when creating a certificate. The `-subj`
+ option now is an alias for `-set_subject`.
+
+ *Job Snijders, George Michaelson*
+
+ * OPENSSL_sk_push() and sk_<TYPE>_push() functions now return 0 instead of -1
+ if called with a NULL stack argument.
+
+ *Tomáš Mráz*
+
+ * In `openssl speed`, changed the default hash function used with `hmac` from
+ `md5` to `sha256`.
+
+ *James Muir*
+
+ * Added several new features of CMPv3 defined in RFC 9480 and RFC 9483:
+ - `certProfile` request message header and respective `-profile` CLI option
+ - support for delayed delivery of all types of response messages
+
+ *David von Oheimb*
+
+ * The build of exporters (such as `.pc` files for pkg-config) cleaned up to
+ be less hard coded in the build file templates, and to allow easier
+ addition of more exporters. With that, an exporter for CMake is also
+ added.
+
+ *Richard Levitte*
+
+ * The BLAKE2s hash algorithm matches BLAKE2b's support
+ for configurable output length.
+
+ *Ahelenia Ziemiańska*
+
+ * New option `SSL_OP_PREFER_NO_DHE_KEX`, which allows configuring a TLS1.3
+ server to prefer session resumption using PSK-only key exchange over PSK
+ with DHE, if both are available.
+
+ *Markus Minichmayr, Tapkey GmbH*
+
+ * New API `SSL_write_ex2`, which can be used to send an end-of-stream (FIN)
+ condition in an optimised way when using QUIC.
+
+ *Hugo Landau*
+
+ * New atexit configuration switch, which controls whether the OPENSSL_cleanup
+ is registered when libcrypto is unloaded. This is turned off on NonStop
+ configurations because of loader differences on that platform compared to
+ Linux.
+
+ *Randall S. Becker*
+
+ * Support for qlog for tracing QUIC connections has been added.
+
+ The qlog output from OpenSSL currently uses a pre-standard draft version of
+ qlog. The output from OpenSSL will change in incompatible ways in future
+ releases, and is not subject to any format stability or compatibility
+ guarantees at this time. This functionality can be
+ disabled with the build-time option `no-unstable-qlog`. See the
+ openssl-qlog(7) manpage for details.
+
+ *Hugo Landau*
+
+ * Added APIs to allow configuring the negotiated idle timeout for QUIC
+ connections, and to allow determining the number of additional streams
+ that can currently be created for a QUIC connection.
+
+ *Hugo Landau*
+
+ * Added APIs to allow disabling implicit QUIC event processing for
+ QUIC SSL objects, allowing applications to control when event handling
+ occurs. Refer to the SSL_get_value_uint(3) manpage for details.
+
+ *Hugo Landau*
+
+ * Limited support for polling of QUIC connection and stream objects in a
+ non-blocking manner. Refer to the SSL_poll(3) manpage for details.
+
+ *Hugo Landau*
+
+ * Added APIs to allow querying the size and utilisation of a QUIC stream's
+ write buffer. Refer to the SSL_get_value_uint(3) manpage for details.
+
+ *Hugo Landau*
+
+ * New limit on HTTP response headers is introduced to HTTP client. The
+ default limit is set to 256 header lines. If limit is exceeded the
+ response processing stops with error HTTP_R_RESPONSE_TOO_MANY_HDRLINES.
+ Application may call OSSL_HTTP_REQ_CTX_set_max_response_hdr_lines(3)
+ to change the default. Setting the value to 0 disables the limit.
+
+ *Alexandr Nedvedicky*
+
+ * Applied AES-GCM unroll8 optimisation to Microsoft Azure Cobalt 100
+
+ *Tom Cosgrove*
+
+ * Added X509_STORE_get1_objects to avoid issues with the existing
+ X509_STORE_get0_objects API in multi-threaded applications. Refer to the
+ documentation for details.
+
+ *David Benjamin*
+
+ * Added assembly implementation for md5 on loongarch64
+
+ *Min Zhou*
+
+ * Optimized AES-CTR for ARM Neoverse V1 and V2
+
+ *Fisher Yu*
+
+ * Enable AES and SHA3 optimisations on Applie Silicon M3-based MacOS systems
+ similar to M1/M2.
+
+ *Tom Cosgrove*
+
+ * Added a new EVP_DigestSqueeze() API. This allows SHAKE to squeeze multiple
+ times with different output sizes.
+
+ *Shane Lontis, Holger Dengler*
+
+ * Various optimizations for cryptographic routines using RISC-V vector crypto
+ extensions
+
+ *Christoph Müllner, Charalampos Mitrodimas, Ard Biesheuvel, Phoebe Chen,
+ Jerry Shih*
+
+ * Accept longer context for TLS 1.2 exporters
+
+ While RFC 5705 implies that the maximum length of a context for exporters is
+ 65535 bytes as the length is embedded in uint16, the previous implementation
+ enforced a much smaller limit, which is less than 1024 bytes. This
+ restriction has been removed.
+
+ *Daiki Ueno*
+
OpenSSL 3.2
-----------
-### Changes between 3.1 and 3.2 [xx XXX xxxx]
+### Changes between 3.2.1 and 3.2.2 [xx XXX xxxx]
- * Provide a new configure option `no-http` that can be used to disable HTTP
- support.
+ * Fixed an issue where some non-default TLS server configurations can cause
+ unbounded memory growth when processing TLSv1.3 sessions. An attacker may
+ exploit certain server configurations to trigger unbounded memory growth that
+ would lead to a Denial of Service
+
+ This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option
+ is being used (but not if early_data is also configured and the default
+ anti-replay protection is in use). In this case, under certain conditions,
+ the session cache can get into an incorrect state and it will fail to flush
+ properly as it fills. The session cache will continue to grow in an unbounded
+ manner. A malicious client could deliberately create the scenario for this
+ failure to force a Denial of Service. It may also happen by accident in
+ normal operation.
+
+ ([CVE-2024-2511])
+
+ *Matt Caswell*
+
+ * Fixed bug where SSL_export_keying_material() could not be used with QUIC
+ connections. (#23560)
+
+ *Hugo Landau*
+
+### Changes between 3.2.0 and 3.2.1 [30 Jan 2024]
+
+ * A file in PKCS12 format can contain certificates and keys and may come from
+ an untrusted source. The PKCS12 specification allows certain fields to be
+ NULL, but OpenSSL did not correctly check for this case. A fix has been
+ applied to prevent a NULL pointer dereference that results in OpenSSL
+ crashing. If an application processes PKCS12 files from an untrusted source
+ using the OpenSSL APIs then that application will be vulnerable to this
+ issue prior to this fix.
+
+ OpenSSL APIs that were vulnerable to this are: PKCS12_parse(),
+ PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes()
+ and PKCS12_newpass().
+
+ We have also fixed a similar issue in SMIME_write_PKCS7(). However since this
+ function is related to writing data we do not consider it security
+ significant.
+
+ ([CVE-2024-0727])
+
+ *Matt Caswell*
+
+ * When function EVP_PKEY_public_check() is called on RSA public keys,
+ a computation is done to confirm that the RSA modulus, n, is composite.
+ For valid RSA keys, n is a product of two or more large primes and this
+ computation completes quickly. However, if n is an overly large prime,
+ then this computation would take a long time.
+
+ An application that calls EVP_PKEY_public_check() and supplies an RSA key
+ obtained from an untrusted source could be vulnerable to a Denial of Service
+ attack.
+
+ The function EVP_PKEY_public_check() is not called from other OpenSSL
+ functions however it is called from the OpenSSL pkey command line
+ application. For that reason that application is also vulnerable if used
+ with the "-pubin" and "-check" options on untrusted data.
+
+ To resolve this issue RSA keys larger than OPENSSL_RSA_MAX_MODULUS_BITS will
+ now fail the check immediately with an RSA_R_MODULUS_TOO_LARGE error reason.
+
+ ([CVE-2023-6237])
+
+ *Tomáš Mráz*
+
+ * Restore the encoding of SM2 PrivateKeyInfo and SubjectPublicKeyInfo to
+ have the contained AlgorithmIdentifier.algorithm set to id-ecPublicKey
+ rather than SM2.
+
+ *Richard Levitte*
+
+ * The POLY1305 MAC (message authentication code) implementation in OpenSSL
+ for PowerPC CPUs saves the contents of vector registers in different
+ order than they are restored. Thus the contents of some of these vector
+ registers is corrupted when returning to the caller. The vulnerable code is
+ used only on newer PowerPC processors supporting the PowerISA 2.07
+ instructions.
+
+ The consequences of this kind of internal application state corruption can
+ be various - from no consequences, if the calling application does not
+ depend on the contents of non-volatile XMM registers at all, to the worst
+ consequences, where the attacker could get complete control of the
+ application process. However unless the compiler uses the vector registers
+ for storing pointers, the most likely consequence, if any, would be an
+ incorrect result of some application dependent calculations or a crash
+ leading to a denial of service.
+
+ ([CVE-2023-6129])
+
+ *Rohan McLure*
+
+ * Disable building QUIC server utility when OpenSSL is configured with
+ `no-apps`.
+
+ *Vitalii Koshura*
+
+### Changes between 3.1 and 3.2.0 [23 Nov 2023]
+
+ * Fix excessive time spent in DH check / generation with large Q parameter
+ value.
+
+ Applications that use the functions DH_generate_key() to generate an
+ X9.42 DH key may experience long delays. Likewise, applications that use
+ DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check()
+ to check an X9.42 DH key or X9.42 DH parameters may experience long delays.
+ Where the key or parameters that are being checked have been obtained from
+ an untrusted source this may lead to a Denial of Service.
+
+ ([CVE-2023-5678])
+
+ *Richard Levitte*
+
+ * The BLAKE2b hash algorithm supports a configurable output length
+ by setting the "size" parameter.
+
+ *Čestmír Kalina and Tomáš Mráz*
+
+ * Enable extra Arm64 optimization on Windows for GHASH, RAND and AES.
+
+ *Evgeny Karpov*
+
+ * Added a function to delete objects from store by URI - OSSL_STORE_delete()
+ and the corresponding provider-storemgmt API function
+ OSSL_FUNC_store_delete().
+
+ *Dmitry Belyavskiy*
+
+ * Added OSSL_FUNC_store_open_ex() provider-storemgmt API function to pass
+ a passphrase callback when opening a store.
+
+ *Simo Sorce*
+
+ * Changed the default salt length used by PBES2 KDF's (PBKDF2 and scrypt)
+ from 8 bytes to 16 bytes.
+ The PKCS5 (RFC 8018) standard uses a 64 bit salt length for PBE, and
+ recommends a minimum of 64 bits for PBES2. For FIPS compliance PBKDF2
+ requires a salt length of 128 bits. This affects OpenSSL command line
+ applications such as "genrsa" and "pkcs8" and API's such as
+ PEM_write_bio_PrivateKey() that are reliant on the default value.
+ The additional commandline option 'saltlen' has been added to the
+ OpenSSL command line applications for "pkcs8" and "enc" to allow the
+ salt length to be set to a non default value.
+
+ *Shane Lontis*
+
+ * Changed the default value of the `ess_cert_id_alg` configuration
+ option which is used to calculate the TSA's public key certificate
+ identifier. The default algorithm is updated to be sha256 instead
+ of sha1.
+
+ *Małgorzata Olszówka*
+
+ * Added optimization for SM2 algorithm on aarch64. It uses a huge precomputed
+ table for point multiplication of the base point, which increases the size of
+ libcrypto from 4.4 MB to 4.9 MB. A new configure option `no-sm2-precomp` has
+ been added to disable the precomputed table.
+
+ *Xu Yizhou*
+
+ * Added client side support for QUIC
+
+ *Hugo Landau, Matt Caswell, Paul Dale, Tomáš Mráz, Richard Levitte*
+
+ * Added multiple tutorials on the OpenSSL library and in particular
+ on writing various clients (using TLS and QUIC protocols) with libssl.
+
+ *Matt Caswell*
+
+ * Added secp384r1 implementation using Solinas' reduction to improve
+ speed of the NIST P-384 elliptic curve. To enable the implementation
+ the build option `enable-ec_nistp_64_gcc_128` must be used.
+
+ *Rohan McLure*
+
+ * Improved RFC7468 compliance of the asn1parse command.
+
+ *Matthias St. Pierre*
+
+ * Added SHA256/192 algorithm support.
+
+ *Fergus Dall*
+
+ * Added support for securely getting root CA certificate update in
+ CMP.
+
+ *David von Oheimb*
+
+ * Improved contention on global write locks by using more read locks where
+ appropriate.
+
+ *Matt Caswell*
+
+ * Improved performance of OSSL_PARAM lookups in performance critical
+ provider functions.
+
+ *Paul Dale*
+
+ * Added the SSL_get0_group_name() function to provide access to the
+ name of the group used for the TLS key exchange.
+
+ *Alex Bozarth*
+
+ * Provide a new configure option `no-http` that can be used to disable the
+ HTTP support. Provide new configure options `no-apps` and `no-docs` to
+ disable building the openssl command line application and the documentation.
*Vladimír Kotal*
+ * Provide a new configure option `no-ecx` that can be used to disable the
+ X25519, X448, and EdDSA support.
+
+ *Yi Li*
+
+ * When multiple OSSL_KDF_PARAM_INFO parameters are passed to
+ the EVP_KDF_CTX_set_params() function they are now concatenated not just
+ for the HKDF algorithm but also for SSKDF and X9.63 KDF algorithms.
+
+ *Paul Dale*
+
+ * Added OSSL_FUNC_keymgmt_im/export_types_ex() provider functions that get
+ the provider context as a parameter.
+
+ *Ingo Franzki*
+
* TLS round-trip time calculation was added by a Brigham Young University
Capstone team partnering with Sandia National Laboratories. A new function
in ssl_lib titled SSL_get_handshake_rtt will calculate and retrieve this
*Matt Caswell*
- * Reworked the Fix for the Timing Oracle in RSA Decryption ([CVE-2022-4304]).
- The previous fix for this timing side channel turned out to cause
- a severe 2-3x performance regression in the typical use case
- compared to 3.0.7. The new fix uses existing constant time
- code paths, and restores the previous performance level while
- fully eliminating all existing timing side channels.
- The fix was developed by Bernd Edlinger with testing support
- by Hubert Kario.
-
- *Bernd Edlinger*
-
* Added an "advanced" command mode to s_client. Use this with the "-adv"
option. The old "basic" command mode recognises certain letters that must
always appear at the start of a line and cannot be escaped. The advanced
*Todd Short*
- * Added EC_GROUP_to_params which creates an OSSL_PARAM array
+ * Added support for modular exponentiation and CRT offloading for the
+ S390x architecture.
+
+ *Juergen Christ*
+
+ * Added further assembler code for the RISC-V architecture.
+
+ *Christoph Müllner*
+
+ * Added EC_GROUP_to_params() which creates an OSSL_PARAM array
from a given EC_GROUP.
*Oliver Mihatsch*
+ * Improved support for non-default library contexts and property queries
+ when parsing PKCS#12 files.
+
+ *Shane Lontis*
+
+ * Implemented support for all five instances of EdDSA from RFC8032:
+ Ed25519, Ed25519ctx, Ed25519ph, Ed448, and Ed448ph.
+ The streaming is not yet supported for the HashEdDSA variants
+ (Ed25519ph and Ed448ph).
+
+ *James Muir*
+
+ * Added SM4 optimization for ARM processors using ASIMD and AES HW
+ instructions.
+
+ *Xu Yizhou*
+
+ * Implemented SM4-XTS support.
+
+ *Xu Yizhou*
+
+ * Added platform-agnostic OSSL_sleep() function.
+
+ *Richard Levitte*
+
+ * Implemented deterministic ECDSA signatures (RFC6979) support.
+
+ *Shane Lontis*
+
+ * Implemented AES-GCM-SIV (RFC8452) support.
+
+ *Todd Short*
+
* Added support for pluggable (provider-based) TLS signature algorithms.
This enables TLS 1.3 authentication operations with algorithms embedded
in providers not included by default in OpenSSL. In combination with
*Michael Baentsch*
+ * Added support for pluggable (provider-based) CMS signature algorithms.
+ This enables CMS sign and verify operations with algorithms embedded
+ in providers not included by default in OpenSSL.
+
+ *Michael Baentsch*
+
* Added support for Hybrid Public Key Encryption (HPKE) as defined
in RFC9180. HPKE is required for TLS Encrypted ClientHello (ECH),
Message Layer Security (MLS) and other IETF specifications.
*Stephen Farrell*
+ * Implemented HPKE DHKEM support in providers used by HPKE (RFC9180)
+ API.
+
+ *Shane Lontis*
+
* Add support for certificate compression (RFC8879), including
library support for Brotli and Zstandard compression.
*Graham Woodward*
- * Major refactor of the libssl record layer
-
- *Matt Caswell*
-
- * Added a new BIO_s_dgram_mem() to read/write datagrams to memory
+ * Major refactor of the libssl record layer.
*Matt Caswell*
*Darshan Sen*
+ * The PKCS12_parse() function now supports MAC-less PKCS12 files.
+
+ *Daniel Fiala*
+
+ * Added ASYNC_set_mem_functions() and ASYNC_get_mem_functions() calls to be able
+ to change functions used for allocating the memory of asynchronous call stack.
+
+ *Arran Cudbard-Bell*
+
+ * Added support for signed BIGNUMs in the OSSL_PARAM APIs.
+
+ *Richard Levitte*
+
+ * A failure exit code is returned when using the openssl x509 command to check
+ certificate attributes and the checks fail.
+
+ *Rami Khaldi*
+
* The default SSL/TLS security level has been changed from 1 to 2. RSA,
DSA and DH keys of 1024 bits and above and less than 2048 bits and ECC keys
of 160 bits and above and less than 224 bits were previously accepted by
will need to load the legacy crypto provider.
*Paul Dale*
+
* CCM8 cipher suites in TLS have been downgraded to security level zero
because they use a short authentication tag which lowers their strength.
*Paul Dale*
* Subject or issuer names in X.509 objects are now displayed as UTF-8 strings
- by default.
+ by default. Also spaces surrounding `=` in DN output are removed.
*Dmitry Belyavskiy*
*David von Oheimb*
- * `CMS_add0_cert()` and `CMS_add1_cert()` no more throw an error
- if a certificate to be added is already present.
- * `CMS_sign_ex()` and `CMS_sign()` now ignore any duplicate certificates
- in their `certs` argument and no longer throw an error for them.
+ * `CMS_add0_cert()` and `CMS_add1_cert()` no longer throw an error if
+ a certificate to be added is already present. `CMS_sign_ex()` and
+ `CMS_sign()` now ignore any duplicate certificates in their `certs` argument
+ and no longer throw an error for them.
*David von Oheimb*
*David von Oheimb*
+ * Added BIO_s_dgram_pair() and BIO_s_dgram_mem() that provide memory-based
+ BIOs with datagram semantics and support for BIO_sendmmsg() and BIO_recvmmsg()
+ calls. They can be used as the transport BIOs for QUIC.
+
+ *Hugo Landau, Matt Caswell and Tomáš Mráz*
+
* Add new BIO_sendmmsg() and BIO_recvmmsg() BIO methods which allow
sending and receiving multiple messages in a single call. An implementation
is provided for BIO_dgram. For further details, see BIO_sendmmsg(3).
*Tianjia Zhang*
+ * Added `-ktls` option to `s_server` and `s_client` commands to enable the
+ KTLS support.
+
+ *Tianjia Zhang*
+
* Zerocopy KTLS sendfile() support on Linux.
*Maxim Mikityanskiy*
+ * The OBJ_ calls are now thread safe using a global lock.
+
+ *Paul Dale*
+
+ * New parameter `-digest` for openssl cms command allowing signing
+ pre-computed digests and new CMS API functions supporting that
+ functionality.
+
+ *Viktor Söderqvist*
+
+ * OPENSSL_malloc() and other allocation functions now raise errors on
+ allocation failures. The callers do not need to explicitly raise errors
+ unless they want to for tracing purposes.
+
+ *David von Oheimb*
+
* Added and enabled by default implicit rejection in RSA PKCS#1 v1.5
decryption as a protection against Bleichenbacher-like attacks.
The RSA decryption API will now return a randomly generated deterministic
*Hubert Kario*
+ * Added support for Brainpool curves in TLS-1.3.
+
+ *Bernd Edlinger and Matt Caswell*
+
+ * Added OpenBSD specific build targets.
+
+ *David Carlier*
+
* Support for Argon2d, Argon2i, Argon2id KDFs has been added along with
- basic thread pool implementation for select platforms.
+ a basic thread pool implementation for select platforms.
*Čestmír Kalina*
OpenSSL 3.1
-----------
-### Changes between 3.1.0 and 3.1.1 [xx XXX xxxx]
+### Changes between 3.1.3 and 3.1.4 [24 Oct 2023]
+
+ * Fix incorrect key and IV resizing issues when calling EVP_EncryptInit_ex2(),
+ EVP_DecryptInit_ex2() or EVP_CipherInit_ex2() with OSSL_PARAM parameters
+ that alter the key or IV length ([CVE-2023-5363]).
+
+ *Paul Dale*
+
+### Changes between 3.1.2 and 3.1.3 [19 Sep 2023]
+
+ * Fix POLY1305 MAC implementation corrupting XMM registers on Windows.
+
+ The POLY1305 MAC (message authentication code) implementation in OpenSSL
+ does not save the contents of non-volatile XMM registers on Windows 64
+ platform when calculating the MAC of data larger than 64 bytes. Before
+ returning to the caller all the XMM registers are set to zero rather than
+ restoring their previous content. The vulnerable code is used only on newer
+ x86_64 processors supporting the AVX512-IFMA instructions.
+
+ The consequences of this kind of internal application state corruption can
+ be various - from no consequences, if the calling application does not
+ depend on the contents of non-volatile XMM registers at all, to the worst
+ consequences, where the attacker could get complete control of the
+ application process. However given the contents of the registers are just
+ zeroized so the attacker cannot put arbitrary values inside, the most likely
+ consequence, if any, would be an incorrect result of some application
+ dependent calculations or a crash leading to a denial of service.
+
+ ([CVE-2023-4807])
+
+ *Bernd Edlinger*
+
+### Changes between 3.1.1 and 3.1.2 [1 Aug 2023]
+
+ * Fix excessive time spent checking DH q parameter value.
+
+ The function DH_check() performs various checks on DH parameters. After
+ fixing CVE-2023-3446 it was discovered that a large q parameter value can
+ also trigger an overly long computation during some of these checks.
+ A correct q value, if present, cannot be larger than the modulus p
+ parameter, thus it is unnecessary to perform these checks if q is larger
+ than p.
+
+ If DH_check() is called with such q parameter value,
+ DH_CHECK_INVALID_Q_VALUE return flag is set and the computationally
+ intensive checks are skipped.
+
+ ([CVE-2023-3817])
+
+ *Tomáš Mráz*
+
+ * Fix DH_check() excessive time with over sized modulus.
+
+ The function DH_check() performs various checks on DH parameters. One of
+ those checks confirms that the modulus ("p" parameter) is not too large.
+ Trying to use a very large modulus is slow and OpenSSL will not normally use
+ a modulus which is over 10,000 bits in length.
+
+ However the DH_check() function checks numerous aspects of the key or
+ parameters that have been supplied. Some of those checks use the supplied
+ modulus value even if it has already been found to be too large.
+
+ A new limit has been added to DH_check of 32,768 bits. Supplying a
+ key/parameters with a modulus over this size will simply cause DH_check() to
+ fail.
+
+ ([CVE-2023-3446])
+
+ *Matt Caswell*
+
+ * Do not ignore empty associated data entries with AES-SIV.
+
+ The AES-SIV algorithm allows for authentication of multiple associated
+ data entries along with the encryption. To authenticate empty data the
+ application has to call `EVP_EncryptUpdate()` (or `EVP_CipherUpdate()`)
+ with NULL pointer as the output buffer and 0 as the input buffer length.
+ The AES-SIV implementation in OpenSSL just returns success for such call
+ instead of performing the associated data authentication operation.
+ The empty data thus will not be authenticated. ([CVE-2023-2975])
+
+ Thanks to Juerg Wullschleger (Google) for discovering the issue.
+
+ The fix changes the authentication tag value and the ciphertext for
+ applications that use empty associated data entries with AES-SIV.
+ To decrypt data encrypted with previous versions of OpenSSL the application
+ has to skip calls to `EVP_DecryptUpdate()` for empty associated data
+ entries.
+
+ *Tomáš Mráz*
+
+ * When building with the `enable-fips` option and using the resulting
+ FIPS provider, TLS 1.2 will, by default, mandate the use of an extended
+ master secret (FIPS 140-3 IG G.Q) and the Hash and HMAC DRBGs will
+ not operate with truncated digests (FIPS 140-3 IG G.R).
+
+ *Paul Dale*
+
+### Changes between 3.1.0 and 3.1.1 [30 May 2023]
* Mitigate for the time it takes for `OBJ_obj2txt` to translate gigantic
OBJECT IDENTIFIER sub-identifiers to canonical numeric text form.
*Nevine Ebeid*
+ * Reworked the Fix for the Timing Oracle in RSA Decryption ([CVE-2022-4304]).
+ The previous fix for this timing side channel turned out to cause
+ a severe 2-3x performance regression in the typical use case
+ compared to 3.0.7. The new fix uses existing constant time
+ code paths, and restores the previous performance level while
+ fully eliminating all existing timing side channels.
+ The fix was developed by Bernd Edlinger with testing support
+ by Hubert Kario.
+
+ *Bernd Edlinger*
+
* Add FIPS provider configuration option to disallow the use of
truncated digests with Hash and HMAC DRBGs (q.v. FIPS 140-3 IG D.R.).
The option '-no_drbg_truncated_digests' can optionally be
3-prime RSA1536, and DSA1024 as a result of this defect would be very
difficult to perform and are not believed likely. Attacks against DH512
are considered just feasible. However, for an attack the target would
- have to re-use the DH512 private key, which is not recommended anyway.
+ have to reuse the DH512 private key, which is not recommended anyway.
Also applications directly using the low-level API BN_mod_exp may be
affected if they use BN_FLG_CONSTTIME.
([CVE-2019-1551])
<!-- Links -->
+[CVE-2024-2511]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-2511
+[CVE-2024-0727]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-0727
+[CVE-2023-6237]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-6237
+[CVE-2023-6129]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-6129
+[CVE-2023-5678]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-5678
+[CVE-2023-5363]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-5363
+[CVE-2023-4807]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-4807
+[CVE-2023-3817]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-3817
+[CVE-2023-3446]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-3446
+[CVE-2023-2975]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-2975
[RFC 2578 (STD 58), section 3.5]: https://datatracker.ietf.org/doc/html/rfc2578#section-3.5
[CVE-2023-2650]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-2650
[CVE-2023-1255]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-1255
projects / openssl.git / blobdiff