OpenSSL CHANGES
_______________
- Changes between 1.0.1j and 1.0.1k [xx XXX xxxx]
+ Changes between 1.0.1n and 1.0.1o [xx XXX xxxx]
+
+ *)
+
+ Changes between 1.0.1m and 1.0.1n [11 Jun 2015]
+
+ *) Malformed ECParameters causes infinite loop
+
+ When processing an ECParameters structure OpenSSL enters an infinite loop
+ if the curve specified is over a specially malformed binary polynomial
+ field.
+
+ This can be used to perform denial of service against any
+ system which processes public keys, certificate requests or
+ certificates. This includes TLS clients and TLS servers with
+ client authentication enabled.
+
+ This issue was reported to OpenSSL by Joseph Barr-Pixton.
+ (CVE-2015-1788)
+ [Andy Polyakov]
+
+ *) Exploitable out-of-bounds read in X509_cmp_time
+
+ X509_cmp_time does not properly check the length of the ASN1_TIME
+ string and can read a few bytes out of bounds. In addition,
+ X509_cmp_time accepts an arbitrary number of fractional seconds in the
+ time string.
+
+ An attacker can use this to craft malformed certificates and CRLs of
+ various sizes and potentially cause a segmentation fault, resulting in
+ a DoS on applications that verify certificates or CRLs. TLS clients
+ that verify CRLs are affected. TLS clients and servers with client
+ authentication enabled may be affected if they use custom verification
+ callbacks.
+
+ This issue was reported to OpenSSL by Robert Swiecki (Google), and
+ independently by Hanno Böck.
+ (CVE-2015-1789)
+ [Emilia Käsper]
+
+ *) PKCS7 crash with missing EnvelopedContent
+
+ The PKCS#7 parsing code does not handle missing inner EncryptedContent
+ correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
+ with missing content and trigger a NULL pointer dereference on parsing.
+
+ Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
+ structures from untrusted sources are affected. OpenSSL clients and
+ servers are not affected.
+
+ This issue was reported to OpenSSL by Michal Zalewski (Google).
+ (CVE-2015-1790)
+ [Emilia Käsper]
+
+ *) CMS verify infinite loop with unknown hash function
+
+ When verifying a signedData message the CMS code can enter an infinite loop
+ if presented with an unknown hash function OID. This can be used to perform
+ denial of service against any system which verifies signedData messages using
+ the CMS code.
+ This issue was reported to OpenSSL by Johannes Bauer.
+ (CVE-2015-1792)
+ [Stephen Henson]
+
+ *) Race condition handling NewSessionTicket
+
+ If a NewSessionTicket is received by a multi-threaded client when attempting to
+ reuse a previous ticket then a race condition can occur potentially leading to
+ a double free of the ticket data.
+ (CVE-2015-1791)
+ [Matt Caswell]
+
+ *) Reject DH handshakes with parameters shorter than 768 bits.
+ [Kurt Roeckx and Emilia Kasper]
+
+ Changes between 1.0.1l and 1.0.1m [19 Mar 2015]
+
+ *) Segmentation fault in ASN1_TYPE_cmp fix
+
+ The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
+ made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
+ certificate signature algorithm consistency this can be used to crash any
+ certificate verification operation and exploited in a DoS attack. Any
+ application which performs certificate verification is vulnerable including
+ OpenSSL clients and servers which enable client authentication.
+ (CVE-2015-0286)
+ [Stephen Henson]
+
+ *) ASN.1 structure reuse memory corruption fix
+
+ Reusing a structure in ASN.1 parsing may allow an attacker to cause
+ memory corruption via an invalid write. Such reuse is and has been
+ strongly discouraged and is believed to be rare.
+
+ Applications that parse structures containing CHOICE or ANY DEFINED BY
+ components may be affected. Certificate parsing (d2i_X509 and related
+ functions) are however not affected. OpenSSL clients and servers are
+ not affected.
+ (CVE-2015-0287)
+ [Stephen Henson]
+
+ *) PKCS7 NULL pointer dereferences fix
+
+ The PKCS#7 parsing code does not handle missing outer ContentInfo
+ correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
+ missing content and trigger a NULL pointer dereference on parsing.
+
+ Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
+ otherwise parse PKCS#7 structures from untrusted sources are
+ affected. OpenSSL clients and servers are not affected.
+
+ This issue was reported to OpenSSL by Michal Zalewski (Google).
+ (CVE-2015-0289)
+ [Emilia Käsper]
+
+ *) DoS via reachable assert in SSLv2 servers fix
+
+ A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
+ servers that both support SSLv2 and enable export cipher suites by sending
+ a specially crafted SSLv2 CLIENT-MASTER-KEY message.
+
+ This issue was discovered by Sean Burford (Google) and Emilia Käsper
+ (OpenSSL development team).
+ (CVE-2015-0293)
+ [Emilia Käsper]
+
+ *) Use After Free following d2i_ECPrivatekey error fix
+
+ A malformed EC private key file consumed via the d2i_ECPrivateKey function
+ could cause a use after free condition. This, in turn, could cause a double
+ free in several private key parsing functions (such as d2i_PrivateKey
+ or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
+ for applications that receive EC private keys from untrusted
+ sources. This scenario is considered rare.
+
+ This issue was discovered by the BoringSSL project and fixed in their
+ commit 517073cd4b.
+ (CVE-2015-0209)
+ [Matt Caswell]
+
+ *) X509_to_X509_REQ NULL pointer deref fix
+
+ The function X509_to_X509_REQ will crash with a NULL pointer dereference if
+ the certificate key is invalid. This function is rarely used in practice.
+
+ This issue was discovered by Brian Carpenter.
+ (CVE-2015-0288)
+ [Stephen Henson]
+
+ *) Removed the export ciphers from the DEFAULT ciphers
+ [Kurt Roeckx]
+
+ Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
+
+ *) Build fixes for the Windows and OpenVMS platforms
+ [Matt Caswell and Richard Levitte]
+
+ Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
+
+ *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
+ message can cause a segmentation fault in OpenSSL due to a NULL pointer
+ dereference. This could lead to a Denial Of Service attack. Thanks to
+ Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
+ (CVE-2014-3571)
+ [Steve Henson]
+
+ *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
+ dtls1_buffer_record function under certain conditions. In particular this
+ could occur if an attacker sent repeated DTLS records with the same
+ sequence number but for the next epoch. The memory leak could be exploited
+ by an attacker in a Denial of Service attack through memory exhaustion.
+ Thanks to Chris Mueller for reporting this issue.
+ (CVE-2015-0206)
+ [Matt Caswell]
+
+ *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
+ built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
+ method would be set to NULL which could later result in a NULL pointer
+ dereference. Thanks to Frank Schmirler for reporting this issue.
+ (CVE-2014-3569)
+ [Kurt Roeckx]
+
+ *) Abort handshake if server key exchange message is omitted for ephemeral
+ ECDH ciphersuites.
+
+ Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
+ reporting this issue.
+ (CVE-2014-3572)
+ [Steve Henson]
+
+ *) Remove non-export ephemeral RSA code on client and server. This code
+ violated the TLS standard by allowing the use of temporary RSA keys in
+ non-export ciphersuites and could be used by a server to effectively
+ downgrade the RSA key length used to a value smaller than the server
+ certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
+ INRIA or reporting this issue.
+ (CVE-2015-0204)
+ [Steve Henson]
+
+ *) Fixed issue where DH client certificates are accepted without verification.
+ An OpenSSL server will accept a DH certificate for client authentication
+ without the certificate verify message. This effectively allows a client to
+ authenticate without the use of a private key. This only affects servers
+ which trust a client certificate authority which issues certificates
+ containing DH keys: these are extremely rare and hardly ever encountered.
+ Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
+ this issue.
+ (CVE-2015-0205)
+ [Steve Henson]
+
+ *) Ensure that the session ID context of an SSL is updated when its
+ SSL_CTX is updated via SSL_set_SSL_CTX.
+
+ The session ID context is typically set from the parent SSL_CTX,
+ and can vary with the CTX.
+ [Adam Langley]
+
+ *) Fix various certificate fingerprint issues.
+
+ By using non-DER or invalid encodings outside the signed portion of a
+ certificate the fingerprint can be changed without breaking the signature.
+ Although no details of the signed portion of the certificate can be changed
+ this can cause problems with some applications: e.g. those using the
+ certificate fingerprint for blacklists.
+
+ 1. Reject signatures with non zero unused bits.
+
+ If the BIT STRING containing the signature has non zero unused bits reject
+ the signature. All current signature algorithms require zero unused bits.
+
+ 2. Check certificate algorithm consistency.
+
+ Check the AlgorithmIdentifier inside TBS matches the one in the
+ certificate signature. NB: this will result in signature failure
+ errors for some broken certificates.
+
+ Thanks to Konrad Kraszewski from Google for reporting this issue.
+
+ 3. Check DSA/ECDSA signatures use DER.
+
+ Reencode DSA/ECDSA signatures and compare with the original received
+ signature. Return an error if there is a mismatch.
+
+ This will reject various cases including garbage after signature
+ (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
+ program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
+ (negative or with leading zeroes).
+
+ Further analysis was conducted and fixes were developed by Stephen Henson
+ of the OpenSSL core team.
+
+ (CVE-2014-8275)
+ [Steve Henson]
+
+ *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
+ results on some platforms, including x86_64. This bug occurs at random
+ with a very low probability, and is not known to be exploitable in any
+ way, though its exact impact is difficult to determine. Thanks to Pieter
+ Wuille (Blockstream) who reported this issue and also suggested an initial
+ fix. Further analysis was conducted by the OpenSSL development team and
+ Adam Langley of Google. The final fix was developed by Andy Polyakov of
+ the OpenSSL core team.
+ (CVE-2014-3570)
+ [Andy Polyakov]
+
+ *) Do not resume sessions on the server if the negotiated protocol
+ version does not match the session's version. Resuming with a different
+ version, while not strictly forbidden by the RFC, is of questionable
+ sanity and breaks all known clients.
+ [David Benjamin, Emilia Käsper]
*) Tighten handling of the ChangeCipherSpec (CCS) message: reject
early CCS messages during renegotiation. (Note that because
Add command line options to s_client/s_server.
[Steve Henson]
- Changes between 1.0.0j and 1.0.0k [5 Feb 2013]
-
- *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
-
- This addresses the flaw in CBC record processing discovered by
- Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
- at: http://www.isg.rhul.ac.uk/tls/
-
- Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
- Security Group at Royal Holloway, University of London
- (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
- Emilia Käsper for the initial patch.
- (CVE-2013-0169)
- [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
-
- *) Return an error when checking OCSP signatures when key is NULL.
- This fixes a DoS attack. (CVE-2013-0166)
- [Steve Henson]
-
- *) Call OCSP Stapling callback after ciphersuite has been chosen, so
- the right response is stapled. Also change SSL_get_certificate()
- so it returns the certificate actually sent.
- See http://rt.openssl.org/Ticket/Display.html?id=2836.
- (This is a backport)
- [Rob Stradling <rob.stradling@comodo.com>]
-
- *) Fix possible deadlock when decoding public keys.
- [Steve Henson]
-
- Changes between 1.0.0i and 1.0.0j [10 May 2012]
-
- [NB: OpenSSL 1.0.0i and later 1.0.0 patch levels were released after
- OpenSSL 1.0.1.]
-
- *) Sanity check record length before skipping explicit IV in DTLS
- to fix DoS attack.
-
- Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
- fuzzing as a service testing platform.
- (CVE-2012-2333)
- [Steve Henson]
-
- *) Initialise tkeylen properly when encrypting CMS messages.
- Thanks to Solar Designer of Openwall for reporting this issue.
- [Steve Henson]
-
- Changes between 1.0.0h and 1.0.0i [19 Apr 2012]
-
- *) Check for potentially exploitable overflows in asn1_d2i_read_bio
- BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
- in CRYPTO_realloc_clean.
-
- Thanks to Tavis Ormandy, Google Security Team, for discovering this
- issue and to Adam Langley <agl@chromium.org> for fixing it.
- (CVE-2012-2110)
- [Adam Langley (Google), Tavis Ormandy, Google Security Team]
-
Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
*) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
*) Change 'Configure' script to enable Camellia by default.
[NTT]
- Changes between 0.9.8x and 0.9.8y [5 Feb 2013]
-
- *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
-
- This addresses the flaw in CBC record processing discovered by
- Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
- at: http://www.isg.rhul.ac.uk/tls/
-
- Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
- Security Group at Royal Holloway, University of London
- (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
- Emilia Käsper for the initial patch.
- (CVE-2013-0169)
- [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
-
- *) Return an error when checking OCSP signatures when key is NULL.
- This fixes a DoS attack. (CVE-2013-0166)
- [Steve Henson]
-
- *) Call OCSP Stapling callback after ciphersuite has been chosen, so
- the right response is stapled. Also change SSL_get_certificate()
- so it returns the certificate actually sent.
- See http://rt.openssl.org/Ticket/Display.html?id=2836.
- (This is a backport)
- [Rob Stradling <rob.stradling@comodo.com>]
-
- *) Fix possible deadlock when decoding public keys.
- [Steve Henson]
-
- Changes between 0.9.8w and 0.9.8x [10 May 2012]
-
- *) Sanity check record length before skipping explicit IV in DTLS
- to fix DoS attack.
-
- Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
- fuzzing as a service testing platform.
- (CVE-2012-2333)
- [Steve Henson]
-
- *) Initialise tkeylen properly when encrypting CMS messages.
- Thanks to Solar Designer of Openwall for reporting this issue.
- [Steve Henson]
-
- Changes between 0.9.8v and 0.9.8w [23 Apr 2012]
-
- *) The fix for CVE-2012-2110 did not take into account that the
- 'len' argument to BUF_MEM_grow and BUF_MEM_grow_clean is an
- int in OpenSSL 0.9.8, making it still vulnerable. Fix by
- rejecting negative len parameter. (CVE-2012-2131)
- [Tomas Hoger <thoger@redhat.com>]
-
- Changes between 0.9.8u and 0.9.8v [19 Apr 2012]
-
- *) Check for potentially exploitable overflows in asn1_d2i_read_bio
- BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
- in CRYPTO_realloc_clean.
-
- Thanks to Tavis Ormandy, Google Security Team, for discovering this
- issue and to Adam Langley <agl@chromium.org> for fixing it.
- (CVE-2012-2110)
- [Adam Langley (Google), Tavis Ormandy, Google Security Team]
-
- Changes between 0.9.8t and 0.9.8u [12 Mar 2012]
-
- *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
- in CMS and PKCS7 code. When RSA decryption fails use a random key for
- content decryption and always return the same error. Note: this attack
- needs on average 2^20 messages so it only affects automated senders. The
- old behaviour can be reenabled in the CMS code by setting the
- CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
- an MMA defence is not necessary.
- Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
- this issue. (CVE-2012-0884)
- [Steve Henson]
-
- *) Fix CVE-2011-4619: make sure we really are receiving a
- client hello before rejecting multiple SGC restarts. Thanks to
- Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
- [Steve Henson]
-
- Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
-
- *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
- Thanks to Antonio Martin, Enterprise Secure Access Research and
- Development, Cisco Systems, Inc. for discovering this bug and
- preparing a fix. (CVE-2012-0050)
- [Antonio Martin]
-
- Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
-
- *) Nadhem Alfardan and Kenny Paterson have discovered an extension
- of the Vaudenay padding oracle attack on CBC mode encryption
- which enables an efficient plaintext recovery attack against
- the OpenSSL implementation of DTLS. Their attack exploits timing
- differences arising during decryption processing. A research
- paper describing this attack can be found at:
- http://www.isg.rhul.ac.uk/~kp/dtls.pdf
- Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
- Security Group at Royal Holloway, University of London
- (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
- <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
- for preparing the fix. (CVE-2011-4108)
- [Robin Seggelmann, Michael Tuexen]
-
- *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
- [Ben Laurie, Kasper <ekasper@google.com>]
-
- *) Clear bytes used for block padding of SSL 3.0 records.
- (CVE-2011-4576)
- [Adam Langley (Google)]
-
- *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
- Kadianakis <desnacked@gmail.com> for discovering this issue and
- Adam Langley for preparing the fix. (CVE-2011-4619)
- [Adam Langley (Google)]
-
- *) Prevent malformed RFC3779 data triggering an assertion failure.
- Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
- and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
- [Rob Austein <sra@hactrn.net>]
-
- *) Fix ssl_ciph.c set-up race.
- [Adam Langley (Google)]
-
- *) Fix spurious failures in ecdsatest.c.
- [Emilia Käsper (Google)]
-
- *) Fix the BIO_f_buffer() implementation (which was mixing different
- interpretations of the '..._len' fields).
- [Adam Langley (Google)]
-
- *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
- BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
- threads won't reuse the same blinding coefficients.
-
- This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
- lock to call BN_BLINDING_invert_ex, and avoids one use of
- BN_BLINDING_update for each BN_BLINDING structure (previously,
- the last update always remained unused).
- [Emilia Käsper (Google)]
-
- *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
- for multi-threaded use of ECDH.
- [Adam Langley (Google)]
-
- *) Fix x509_name_ex_d2i memory leak on bad inputs.
- [Bodo Moeller]
-
- *) Add protection against ECDSA timing attacks as mentioned in the paper
- by Billy Bob Brumley and Nicola Tuveri, see:
-
- http://eprint.iacr.org/2011/232.pdf
-
- [Billy Bob Brumley and Nicola Tuveri]
-
- Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
-
- *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
- [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
-
- *) Fix bug in string printing code: if *any* escaping is enabled we must
- escape the escape character (backslash) or the resulting string is
- ambiguous.
- [Steve Henson]
-
- Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
-
- *) Disable code workaround for ancient and obsolete Netscape browsers
- and servers: an attacker can use it in a ciphersuite downgrade attack.
- Thanks to Martin Rex for discovering this bug. CVE-2010-4180
- [Steve Henson]
-
- *) Fixed J-PAKE implementation error, originally discovered by
- Sebastien Martini, further info and confirmation from Stefan
- Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
- [Ben Laurie]
-
- Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
-
- *) Fix extension code to avoid race conditions which can result in a buffer
- overrun vulnerability: resumed sessions must not be modified as they can
- be shared by multiple threads. CVE-2010-3864
- [Steve Henson]
-
- *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
- [Steve Henson]
-
- *) Don't reencode certificate when calculating signature: cache and use
- the original encoding instead. This makes signature verification of
- some broken encodings work correctly.
- [Steve Henson]
-
- *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
- is also one of the inputs.
- [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
-
- *) Don't repeatedly append PBE algorithms to table if they already exist.
- Sort table on each new add. This effectively makes the table read only
- after all algorithms are added and subsequent calls to PKCS12_pbe_add
- etc are non-op.
- [Steve Henson]
-
- Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
-
- [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
- OpenSSL 1.0.0.]
-
- *) Correct a typo in the CMS ASN1 module which can result in invalid memory
- access or freeing data twice (CVE-2010-0742)
- [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
-
- *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
- common in certificates and some applications which only call
- SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
- [Steve Henson]
-
- *) VMS fixes:
- Reduce copying into .apps and .test in makevms.com
- Don't try to use blank CA certificate in CA.com
- Allow use of C files from original directories in maketests.com
- [Steven M. Schweda" <sms@antinode.info>]
-
Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
*) When rejecting SSL/TLS records due to an incorrect version number, never
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