OpenSSL    
 Newsflash |  State |  Release Notes |  ChangeLog |  Vulnerabilities 
 
Title
FAQ
About
News
Documents
Source
Support
Related
Security

 

OpenSSL vulnerabilities

Reporting a security vulnerability

If you think you have found a security vulnerability then please send it to the OpenSSL security team using the private security list openssl-security@openssl.org. Encrypting your report is not necessary, but if you wish to do so please use the keys of the core team members. Any email sent to the security team that does not relate to a security vulnerability will be ignored.

Note that bugs only present in the openssl utility are not in general considered to be security issues.

Notification of security vulnerabilities

To get notified when an OpenSSL update addresses a security vulnerability please subscribe to the openssl-announce mailing list

Security vulnerabilities and advisories

This section lists all security vulnerabilities fixed in released versions of OpenSSL since 0.9.6a was released on 5th April 2001.

Note: OpenSSL 0.9.6 versions and 0.9.7 versions are no longer supported and will not receive security updates

2014

CVE-2014-0224: 5th June 2014

An attacker can force the use of weak keying material in OpenSSL SSL/TLS clients and servers. This can be exploited by a Man-in-the-middle (MITM) attack where the attacker can decrypt and modify traffic from the attacked client and server. (original advisory). Reported by KIKUCHI Masashi (Lepidum Co. Ltd.).

Fixed in OpenSSL 1.0.1h (Affected 1.0.1g, 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8za (Affected 0.9.8y, 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2014-0221: 5th June 2014

By sending an invalid DTLS handshake to an OpenSSL DTLS client the code can be made to recurse eventually crashing in a DoS attack. Only applications using OpenSSL as a DTLS client are affected.(original advisory). Reported by Imre Rad (Search-Lab Ltd.).

Fixed in OpenSSL 1.0.1h (Affected 1.0.1g, 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8za (Affected 0.9.8y, 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2014-0195: 5th June 2014

A buffer overrun attack can be triggered by sending invalid DTLS fragments to an OpenSSL DTLS client or server. This is potentially exploitable to run arbitrary code on a vulnerable client or server. Only applications using OpenSSL as a DTLS client or server affected. (original advisory). Reported by Jüri Aedla.

Fixed in OpenSSL 1.0.1h (Affected 1.0.1g, 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8za (Affected 0.9.8y, 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o)

CVE-2014-3470: 30th May 2014

OpenSSL TLS clients enabling anonymous ECDH ciphersuites are subject to a denial of service attack.(original advisory). Reported by Felix Gröbert and Ivan Fratrić (Google).

Fixed in OpenSSL 1.0.1h (Affected 1.0.1g, 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8za (Affected 0.9.8y, 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2014-0198: 21st April 2014

A flaw in the do_ssl3_write function can allow remote attackers to cause a denial of service via a NULL pointer dereference. This flaw only affects OpenSSL 1.0.0 and 1.0.1 where SSL_MODE_RELEASE_BUFFERS is enabled, which is not the default and not common.(original advisory).

Fixed in OpenSSL 1.0.1h (Affected 1.0.1g, 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)

CVE-2010-5298: 8th April 2014

A race condition in the ssl3_read_bytes function can allow remote attackers to inject data across sessions or cause a denial of service. This flaw only affects multithreaded applications using OpenSSL 1.0.0 and 1.0.1, where SSL_MODE_RELEASE_BUFFERS is enabled, which is not the default and not common.(original advisory).

Fixed in OpenSSL 1.0.1h (Affected 1.0.1g, 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)

CVE-2014-0160: 7th April 2014

A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64kB of memory to a connected client or server (a.k.a. Heartbleed). This issue did not affect versions of OpenSSL prior to 1.0.1. (original advisory). Reported by Neel Mehta.

Fixed in OpenSSL 1.0.1g (Affected 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)

CVE-2014-0076: 14th February 2014

Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" Reported by Yuval Yarom and Naomi Benger.

Fixed in OpenSSL 1.0.1g (git commit) (Affected 1.0.1f, 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0m (git commit) (Affected 1.0.0l, 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8za (Affected 0.9.8y, 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2013-4353: 6th January 2014

A carefully crafted invalid TLS handshake could crash OpenSSL with a NULL pointer exception. A malicious server could use this flaw to crash a connecting client. This issue only affected OpenSSL 1.0.1 versions. Reported by Anton Johansson.

Fixed in OpenSSL 1.0.1f (git commit) (Affected 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)

2013

CVE-2013-6449: 14th December 2013

A flaw in OpenSSL can cause an application using OpenSSL to crash when using TLS version 1.2. This issue only affected OpenSSL 1.0.1 versions. Reported by Ron Barber.

Fixed in OpenSSL 1.0.1f (git commit) (Affected 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)

CVE-2013-6450: 13th December 2013

A flaw in DTLS handling can cause an application using OpenSSL and DTLS to crash. This is not a vulnerability for OpenSSL prior to 1.0.0. Reported by Dmitry Sobinov.

Fixed in OpenSSL 1.0.1f (git commit) (Affected 1.0.1e, 1.0.1d, 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0l (Affected 1.0.0k, 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)

CVE-2012-2686: 5th February 2013

A flaw in the OpenSSL handling of CBC ciphersuites in TLS 1.1 and TLS 1.2 on AES-NI supporting platforms can be exploited in a DoS attack. (original advisory). Reported by Adam Langley and Wolfgang Ettlinger.

Fixed in OpenSSL 1.0.1d (Affected 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)

CVE-2013-0166: 5th February 2013

A flaw in the OpenSSL handling of OCSP response verification can be exploited in a denial of service attack. (original advisory). Reported by Stephen Henson.

Fixed in OpenSSL 1.0.1d (Affected 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0k (Affected 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8y (Affected 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2013-0169: 4th February 2013

A weakness in the handling of CBC ciphersuites in SSL, TLS and DTLS which could lead to plaintext recovery by exploiting timing differences arising during MAC processing. (original advisory). Reported by Nadhem J. AlFardan and Kenneth G. Paterson of the Information Security Group Royal Holloway, University of London.

Fixed in OpenSSL 1.0.1d (Affected 1.0.1c, 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0k (Affected 1.0.0j, 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8y (Affected 0.9.8x, 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

2012

CVE-2012-2333: 10th May 2012

An integer underflow flaw, leading to a buffer over-read, was found in the way OpenSSL handled TLS 1.1, TLS 1.2, and DTLS (Datagram Transport Layer Security) application data record lengths when using a block cipher in CBC (cipher-block chaining) mode. A malicious TLS 1.1, TLS 1.2, or DTLS client or server could use this flaw to crash its connection peer. (original advisory). Reported by Codenomicon.

Fixed in OpenSSL 1.0.1c (Affected 1.0.1b, 1.0.1a, 1.0.1)
Fixed in OpenSSL 1.0.0j (Affected 1.0.0i, 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8x (Affected 0.9.8w, 0.9.8v, 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2012-2131: 24th April 2012

It was discovered that the fix for CVE-2012-2110 released on 19 Apr 2012 was not sufficient to correct the issue for OpenSSL 0.9.8. This issue only affects OpenSSL 0.9.8v. OpenSSL 1.0.1a and 1.0.0i already contain a patch sufficient to correct CVE-2012-2110. (original advisory). Reported by Red Hat.

Fixed in OpenSSL 0.9.8w (Affected 0.9.8v)

CVE-2012-2110: 19th April 2012

Multiple numeric conversion errors, leading to a buffer overflow, were found in the way OpenSSL parsed ASN.1 (Abstract Syntax Notation One) data from BIO (OpenSSL's I/O abstraction) inputs. Specially-crafted DER (Distinguished Encoding Rules) encoded data read from a file or other BIO input could cause an application using the OpenSSL library to crash or, potentially, execute arbitrary code. (original advisory). Reported by Tavis Ormandy.

Fixed in OpenSSL 1.0.1a (Affected 1.0.1)
Fixed in OpenSSL 1.0.0i (Affected 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8v (Affected 0.9.8u, 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2012-0884: 12th March 2012

A weakness in the OpenSSL CMS and PKCS #7 code can be exploited using Bleichenbacher's attack on PKCS #1 v1.5 RSA padding also known as the million message attack (MMA). Only users of CMS, PKCS #7, or S/MIME decryption operations are affected, SSL/TLS applications are not affected by this issue. (original advisory). Reported by Ivan Nestlerode.

Fixed in OpenSSL 1.0.0h (Affected 1.0.0g, 1.0.0f, 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8u (Affected 0.9.8t, 0.9.8s, 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2011-4108: 4th January 2012

OpenSSL was susceptable 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 by exploiting timing differences arising during decryption processing. (original advisory). Reported by Nadhem Alfardan and Kenny Paterson.

Fixed in OpenSSL 1.0.0f (Affected 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8s (Affected 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2011-4109: 4th January 2012

If X509_V_FLAG_POLICY_CHECK is set in OpenSSL 0.9.8, then a policy check failure can lead to a double-free. The bug does not occur unless this flag is set. Users of OpenSSL 1.0.0 are not affected (original advisory). Reported by Ben Laurie.

Fixed in OpenSSL 0.9.8s (Affected 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2011-4576: 4th January 2012

OpenSSL failed to clear the bytes used as block cipher padding in SSL 3.0 records which could leak the contents of memory in some circumstances. (original advisory). Reported by Adam Langley.

Fixed in OpenSSL 1.0.0f (Affected 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8s (Affected 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2011-4577: 4th January 2012

RFC 3779 data can be included in certificates, and if it is malformed, may trigger an assertion failure. This could be used in a denial-of-service attack. Builds of OpenSSL are only vulnerable if configured with "enable-rfc3779", which is not a default. (original advisory). Reported by Andrew Chi.

Fixed in OpenSSL 1.0.0f (Affected 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8s (Affected 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2011-4619: 4th January 2012

Support for handshake restarts for server gated cryptograpy (SGC) can be used in a denial-of-service attack. (original advisory). Reported by George Kadianakis.

Fixed in OpenSSL 1.0.0f (Affected 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8s (Affected 0.9.8r, 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2012-0027: 4th January 2012

A malicious TLS client can send an invalid set of GOST parameters which will cause the server to crash due to lack of error checking. This could be used in a denial-of-service attack. Only users of the OpenSSL GOST ENGINE are affected by this bug. (original advisory). Reported by Andrey Kulikov.

Fixed in OpenSSL 1.0.0f (Affected 1.0.0e, 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)

CVE-2012-0050: 4th January 2012

A flaw in the fix to CVE-2011-4108 can be exploited in a denial of service attack. Only DTLS applications are affected. (original advisory). Reported by Antonio Martin.

Fixed in OpenSSL 1.0.0g (Affected 1.0.0f)
Fixed in OpenSSL 0.9.8t (Affected 0.9.8s)

2011

CVE-2011-3207: 6th September 2011

Under certain circumstances OpenSSL's internal certificate verification routines can incorrectly accept a CRL whose nextUpdate field is in the past. Applications are only affected by the CRL checking vulnerability if they enable OpenSSL's internal CRL checking which is off by default. Applications which use their own custom CRL checking (such as Apache) are not affected. (original advisory). Reported by Kaspar Brand.

Fixed in OpenSSL 1.0.0e (Affected 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)

CVE-2011-3210: 6th September 2011

OpenSSL server code for ephemeral ECDH ciphersuites is not thread-safe, and furthermore can crash if a client violates the protocol by sending handshake messages in incorrect order. Only server-side applications that specifically support ephemeral ECDH ciphersuites are affected, and only if ephemeral ECDH ciphersuites are enabled in the configuration. (original advisory). Reported by Adam Langley.

Fixed in OpenSSL 1.0.0e (Affected 1.0.0d, 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)

CVE-2011-0014: 8th February 2011

A buffer over-read flaw was discovered in the way OpenSSL parsed the Certificate Status Request TLS extensions in ClientHello TLS handshake messages. A remote attacker could possibly use this flaw to crash an SSL server using the affected OpenSSL functionality. (original advisory). Reported by Neel Mehta.

Fixed in OpenSSL 1.0.0d (Affected 1.0.0c, 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8r (Affected 0.9.8q, 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h)

2010

CVE-2010-4252: 2nd December 2010

An error in OpenSSL's experimental J-PAKE implementation which could lead to successful validation by someone with no knowledge of the shared secret. The OpenSSL Team still consider the implementation of J-PAKE to be experimental and is not compiled by default. (original advisory). Reported by Sebastian Martini.

Fixed in OpenSSL 1.0.0c (Affected 1.0.0b, 1.0.0a, 1.0.0)

CVE-2010-4180: 2nd December 2010

A flaw in the OpenSSL SSL/TLS server code where an old bug workaround allows malicious clients to modify the stored session cache ciphersuite. In some cases the ciphersuite can be downgraded to a weaker one on subsequent connections. This issue only affects OpenSSL based SSL/TLS server if it uses OpenSSL's internal caching mechanisms and the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG flag (many applications enable this by using the SSL_OP_ALL option). (original advisory). Reported by Martin Rex.

Fixed in OpenSSL 1.0.0c (Affected 1.0.0b, 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8q (Affected 0.9.8p, 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2010-3864: 16th November 2010

A flaw in the OpenSSL TLS server extension code parsing which on affected servers can be exploited in a buffer overrun attack. Any OpenSSL based TLS server is vulnerable if it is multi-threaded and uses OpenSSL's internal caching mechanism. Servers that are multi-process and/or disable internal session caching are NOT affected. (original advisory). Reported by Rob Hulswit.

Fixed in OpenSSL 1.0.0b (Affected 1.0.0a, 1.0.0)
Fixed in OpenSSL 0.9.8p (Affected 0.9.8o, 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2010-0742: 1st June 2010

A flaw in the handling of CMS structures containing OriginatorInfo was found which could lead to a write to invalid memory address or double free. CMS support is disabled by default in OpenSSL 0.9.8 versions. (original advisory). Reported by Ronald Moesbergen.

Fixed in OpenSSL 0.9.8o (Affected 0.9.8n, 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h)
Fixed in OpenSSL 1.0.0a (Affected 1.0.0)

CVE-2010-1633: 1st June 2010

An invalid Return value check in pkey_rsa_verifyrecover was discovered. When verification recovery fails for RSA keys an uninitialised buffer with an undefined length is returned instead of an error code. This could lead to an information leak. (original advisory). Reported by Peter-Michael Hager.

Fixed in OpenSSL 1.0.0a (Affected 1.0.0)

CVE-2010-0740: 24th March 2010

In TLS connections, certain incorrectly formatted records can cause an OpenSSL client or server to crash due to a read attempt at NULL. (original advisory). Reported by Bodo Moeller and Adam Langley (Google).

Fixed in OpenSSL 0.9.8n (Affected 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f)

CVE-2009-3245: 23rd February 2010

It was discovered that OpenSSL did not always check the return value of the bn_wexpand() function. An attacker able to trigger a memory allocation failure in that function could cause an application using the OpenSSL library to crash or, possibly, execute arbitrary code Reported by Martin Olsson, Neel Mehta.

Fixed in OpenSSL 0.9.8m (Affected 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2010-0433: 19th January 2010

A missing return value check flaw was discovered in OpenSSL, that could possibly cause OpenSSL to call a Kerberos library function with invalid arguments, resulting in a NULL pointer dereference crash in the MIT Kerberos library. In certain configurations, a remote attacker could use this flaw to crash a TLS/SSL server using OpenSSL by requesting Kerberos cipher suites during the TLS handshake Reported by Todd Rinaldo, Tomas Hoger (Red Hat).

Fixed in OpenSSL 0.9.8n (Affected 0.9.8m, 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2009-4355: 13th January 2010

A memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c allows remote attackers to cause a denial of service via vectors that trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function. Reported by Michael K Johnson and Andy Grimm (rPath).

Fixed in OpenSSL 0.9.8m (Affected 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

2009

CVE-2009-3555: 5th November 2009

Implement RFC5746 to address vulnerabilities in SSL/TLS renegotiation. (original advisory).

Fixed in OpenSSL 0.9.8m (Affected 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2009-1386: 2nd June 2009

Fix a NULL pointer dereference if a DTLS server recieved ChangeCipherSpec as first record. A remote attacker could use this flaw to cause a DTLS server to crash Reported by Alex Lam.

Fixed in OpenSSL 0.9.8i (Affected 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2009-1377: CVE-2009-1378: CVE-2009-1379: 12th May 2009

Fix denial of service flaws in the DTLS implementation. A remote attacker could use these flaws to cause a DTLS server to use excessive amounts of memory, or crash. Reported by Daniel Mentz, Robin Seggelmann.

Fixed in OpenSSL 0.9.8m (Affected 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2009-0590: 25th March 2009

The function ASN1_STRING_print_ex() when used to print a BMPString or UniversalString will crash with an invalid memory access if the encoded length of the string is illegal. Any OpenSSL application which prints out the contents of a certificate could be affected by this bug, including SSL servers, clients and S/MIME software. (original advisory).

Fixed in OpenSSL 0.9.8k (Affected 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2009-0591: 25th March 2009

The function CMS_verify() does not correctly handle an error condition involving malformed signed attributes. This will cause an invalid set of signed attributes to appear valid and content digests will not be checked. (original advisory). Reported by Ivan Nestlerode, IBM.

Fixed in OpenSSL 0.9.8k (Affected 0.9.8j, 0.9.8i, 0.9.8h)

CVE-2009-0789: 25th March 2009

When a malformed ASN1 structure is received it's contents are freed up and zeroed and an error condition returned. On a small number of platforms where sizeof(long) < sizeof(void *) (for example WIN64) this can cause an invalid memory access later resulting in a crash when some invalid structures are read, for example RSA public keys. (original advisory). Reported by Paolo Ganci.

Fixed in OpenSSL 0.9.8k (Affected 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2009-1387: 5th February 2009

Fix denial of service flaw due in the DTLS implementation. A remote attacker could use this flaw to cause a DTLS server to crash. Reported by Robin Seggelmann.

Fixed in OpenSSL 0.9.8m (Affected 0.9.8l, 0.9.8k, 0.9.8j, 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2008-5077: 7th January 2009

The Google Security Team discovered several functions inside OpenSSL incorrectly checked the result after calling the EVP_VerifyFinal function, allowing a malformed signature to be treated as a good signature rather than as an error. This issue affected the signature checks on DSA and ECDSA keys used with SSL/TLS. One way to exploit this flaw would be for a remote attacker who is in control of a malicious server or who can use a 'man in the middle' attack to present a malformed SSL/TLS signature from a certificate chain to a vulnerable client, bypassing validation. (original advisory). Reported by google.

Fixed in OpenSSL 0.9.8j (Affected 0.9.8i, 0.9.8h, 0.9.8g, 0.9.8f, 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

2008

CVE-2008-0891: 28th May 2008

Testing using the Codenomicon TLS test suite discovered a flaw in the handling of server name extension data in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If OpenSSL has been compiled using the non-default TLS server name extensions, a remote attacker could send a carefully crafted packet to a server application using OpenSSL and cause it to crash. (original advisory). Reported by codenomicon.

Fixed in OpenSSL 0.9.8h (Affected 0.9.8g, 0.9.8f)

CVE-2008-1672: 28th May 2008

Testing using the Codenomicon TLS test suite discovered a flaw if the 'Server Key exchange message' is omitted from a TLS handshake in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If a client connects to a malicious server with particular cipher suites, the server could cause the client to crash. (original advisory). Reported by codenomicon.

Fixed in OpenSSL 0.9.8h (Affected 0.9.8g, 0.9.8f)

2007

CVE-2007-5502: 29th November 2007

The PRNG implementation for the OpenSSL FIPS Object Module 1.1.1 does not perform auto-seeding during the FIPS self-test, which generates random data that is more predictable than expected and makes it easier for attackers to bypass protection mechanisms that rely on the randomness. (original advisory). Reported by Geoff Lowe.

CVE-2007-4995: 12th October 2007

A flaw in DTLS support. An attacker could create a malicious client or server that could trigger a heap overflow. This is possibly exploitable to run arbitrary code, but it has not been verified. (original advisory). Reported by Andy Polyakov.

Fixed in OpenSSL 0.9.8f (Affected 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2007-5135: 12th October 2007

A flaw was found in the SSL_get_shared_ciphers() utility function. An attacker could send a list of ciphers to an application that used this function and overrun a buffer with a single byte. Few applications make use of this vulnerable function and generally it is used only when applications are compiled for debugging. (original advisory). Reported by Moritz Jodeit.

Fixed in OpenSSL 0.9.8f (Affected 0.9.8e, 0.9.8d, 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

2006

CVE-2006-2937: 28th September 2006

During the parsing of certain invalid ASN.1 structures an error condition is mishandled. This can result in an infinite loop which consumes system memory (original advisory). Reported by openssl.

Fixed in OpenSSL 0.9.7l (Affected 0.9.7k, 0.9.7j, 0.9.7i, 0.9.7h, 0.9.7g, 0.9.7f, 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.8d (Affected 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2006-2940: 28th September 2006

Certain types of public key can take disproportionate amounts of time to process. This could be used by an attacker in a denial of service attack. (original advisory). Reported by openssl.

Fixed in OpenSSL 0.9.7l (Affected 0.9.7k, 0.9.7j, 0.9.7i, 0.9.7h, 0.9.7g, 0.9.7f, 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.8d (Affected 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2006-3738: 28th September 2006

A buffer overflow was discovered in the SSL_get_shared_ciphers() utility function. An attacker could send a list of ciphers to an application that uses this function and overrun a buffer. (original advisory). Reported by openssl.

Fixed in OpenSSL 0.9.7l (Affected 0.9.7k, 0.9.7j, 0.9.7i, 0.9.7h, 0.9.7g, 0.9.7f, 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.8d (Affected 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2006-4343: 28th September 2006

A flaw in the SSLv2 client code was discovered. When a client application used OpenSSL to create an SSLv2 connection to a malicious server, that server could cause the client to crash. (original advisory). Reported by openssl.

Fixed in OpenSSL 0.9.7l (Affected 0.9.7k, 0.9.7j, 0.9.7i, 0.9.7h, 0.9.7g, 0.9.7f, 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.8d (Affected 0.9.8c, 0.9.8b, 0.9.8a, 0.9.8)

CVE-2006-4339: 5th September 2006

Daniel Bleichenbacher discovered an attack on PKCS #1 v1.5 signatures where under certain circumstances it may be possible for an attacker to forge a PKCS #1 v1.5 signature that would be incorrectly verified by OpenSSL. (original advisory). Reported by openssl.

Fixed in OpenSSL 0.9.7k (Affected 0.9.7j, 0.9.7i, 0.9.7h, 0.9.7g, 0.9.7f, 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.8c (Affected 0.9.8b, 0.9.8a, 0.9.8)

2005

CVE-2005-2969: 11th October 2005

A deprecated option, SSL_OP_MISE_SSLV2_RSA_PADDING, could allow an attacker acting as a "man in the middle" to force a connection to downgrade to SSL 2.0 even if both parties support better protocols. (original advisory). Reported by researcher.

Fixed in OpenSSL 0.9.7h (Affected 0.9.7g, 0.9.7f, 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.8a (Affected 0.9.8)

2004

CVE-2004-0975: 30th September 2004

The der_chop script created temporary files insecurely which could allow local users to overwrite files via a symlink attack on temporary files. Note that it is quite unlikely that a user would be using the redundant der_chop script, and this script was removed from the OpenSSL distribution.

Fixed in OpenSSL 0.9.7f (Affected 0.9.7e, 0.9.7d, 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.6-cvs (Affected 0.9.6m, 0.9.6l, 0.9.6k, 0.9.6j, 0.9.6i, 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)

CVE-2004-0079: 17th March 2004

The Codenomicon TLS Test Tool uncovered a null-pointer assignment in the do_change_cipher_spec() function. A remote attacker could perform a carefully crafted SSL/TLS handshake against a server that used the OpenSSL library in such a way as to cause a crash. (original advisory). Reported by OpenSSL group.

Fixed in OpenSSL 0.9.7d (Affected 0.9.7c, 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.6m (Affected 0.9.6l, 0.9.6k, 0.9.6j, 0.9.6i, 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c)

CVE-2004-0081: 17th March 2004

The Codenomicon TLS Test Tool found that some unknown message types were handled incorrectly, allowing a remote attacker to cause a denial of service (infinite loop). (original advisory). Reported by OpenSSL group.

CVE-2004-0112: 17th March 2004

A flaw in SSL/TLS handshaking code when using Kerberos ciphersuites. A remote attacker could perform a carefully crafted SSL/TLS handshake against a server configured to use Kerberos ciphersuites in such a way as to cause OpenSSL to crash. Most applications have no ability to use Kerberos ciphersuites and will therefore be unaffected. (original advisory). Reported by OpenSSL group (Stephen Henson).

Fixed in OpenSSL 0.9.7d (Affected 0.9.7c, 0.9.7b, 0.9.7a)

2003

CVE-2003-0851: 4th November 2003

A flaw in OpenSSL 0.9.6k (only) would cause certain ASN.1 sequences to trigger a large recursion. On platforms such as Windows this large recursion cannot be handled correctly and so the bug causes OpenSSL to crash. A remote attacker could exploit this flaw if they can send arbitrary ASN.1 sequences which would cause OpenSSL to crash. This could be performed for example by sending a client certificate to a SSL/TLS enabled server which is configured to accept them. (original advisory). Reported by Novell.

Fixed in OpenSSL 0.9.6l (Affected 0.9.6k)

CVE-2003-0543: 30th September 2003

An integer overflow could allow remote attackers to cause a denial of service (crash) via an SSL client certificate with certain ASN.1 tag values. (original advisory). Reported by NISCC.

Fixed in OpenSSL 0.9.7c (Affected 0.9.7b, 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.6k (Affected 0.9.6j, 0.9.6i, 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)

CVE-2003-0544: 30th September 2003

Incorrect tracking of the number of characters in certain ASN.1 inputs could allow remote attackers to cause a denial of service (crash) by sending an SSL client certificate that causes OpenSSL to read past the end of a buffer when the long form is used. (original advisory). Reported by NISCC.

Fixed in OpenSSL 0.9.6k (Affected 0.9.6j, 0.9.6i, 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)
Fixed in OpenSSL 0.9.7c (Affected 0.9.7b, 0.9.7a, 0.9.7)

CVE-2003-0545: 30th September 2003

Certain ASN.1 encodings that were rejected as invalid by the parser could trigger a bug in the deallocation of the corresponding data structure, corrupting the stack, leading to a crash. (original advisory). Reported by NISCC.

Fixed in OpenSSL 0.9.7c (Affected 0.9.7b, 0.9.7a, 0.9.7)

CVE-2003-0131: 19th March 2003

The SSL and TLS components allowed remote attackers to perform an unauthorized RSA private key operation via a modified Bleichenbacher attack that uses a large number of SSL or TLS connections using PKCS #1 v1.5 padding that caused OpenSSL to leak information regarding the relationship between ciphertext and the associated plaintext, aka the "Klima-Pokorny-Rosa attack" (original advisory).

Fixed in OpenSSL 0.9.6j (Affected 0.9.6i, 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)
Fixed in OpenSSL 0.9.7b (Affected 0.9.7a, 0.9.7)

CVE-2003-0147: 14th March 2003

RSA blinding was not enabled by default, which could allow local and remote attackers to obtain a server's private key by determining factors using timing differences on (1) the number of extra reductions during Montgomery reduction, and (2) the use of different integer multiplication algorithms ("Karatsuba" and normal). (original advisory).

Fixed in OpenSSL 0.9.7b (Affected 0.9.7a, 0.9.7)
Fixed in OpenSSL 0.9.6j (Affected 0.9.6i, 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)

CVE-2003-0078: 19th February 2003

sl3_get_record in s3_pkt.c did not perform a MAC computation if an incorrect block cipher padding was used, causing an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the "Vaudenay timing attack." (original advisory).

Fixed in OpenSSL 0.9.7a (Affected 0.9.7)
Fixed in OpenSSL 0.9.6i (Affected 0.9.6h, 0.9.6g, 0.9.6f, 0.9.6e, 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)

2002

CVE-2002-0655: 30th July 2002

Inproper handling of ASCII representations of integers on 64 bit platforms allowed remote attackers to cause a denial of service or possibly execute arbitrary code. (original advisory). Reported by OpenSSL Group (A.L. Digital).

Fixed in OpenSSL 0.9.6e (Affected 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)

CVE-2002-0656: 30th July 2002

A buffer overflow allowed remote attackers to execute arbitrary code by sending a large client master key in SSL2 or a large session ID in SSL3. (original advisory). Reported by OpenSSL Group (A.L. Digital).

Fixed in OpenSSL 0.9.6e (Affected 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a, 0.9.6)

CVE-2002-0657: 30th July 2002

A buffer overflow when Kerberos is enabled allowed attackers to execute arbitrary code by sending a long master key. Note that this flaw did not affect any released version of 0.9.6 or 0.9.7 (original advisory). Reported by OpenSSL Group (A.L. Digital).

CVE-2002-0659: 30th July 2002

A flaw in the ASN1 library allowed remote attackers to cause a denial of service by sending invalid encodings.

Fixed in OpenSSL 0.9.6e (Affected 0.9.6d, 0.9.6c, 0.9.6b, 0.9.6a)