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CVE-2016-0705

Status Candidate

Overview

Double free vulnerability in the dsa_priv_decode function in crypto/dsa/dsa_ameth.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a malformed DSA private key.

Related Files

Red Hat Security Advisory 2016-0301-01
Posted Mar 2, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0301-01 - OpenSSL is a toolkit that implements the Secure Sockets Layer and Transport Layer Security protocols, as well as a full-strength, general purpose cryptography library. A padding oracle flaw was found in the Secure Sockets Layer version 2.0 protocol. An attacker can potentially use this flaw to decrypt RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol version, allowing them to decrypt such connections. This cross-protocol attack is publicly referred to as DROWN.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2015-3197, CVE-2016-0702, CVE-2016-0705, CVE-2016-0797, CVE-2016-0800
SHA-256 | 2355a22eadd6bc95f2b7051a23cb14934b794d9459acfd366d78f256e320c291
Ubuntu Security Notice USN-2914-1
Posted Mar 2, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2914-1 - Yuval Yarom, Daniel Genkin, and Nadia Heninger discovered that OpenSSL was vulnerable to a side-channel attack on modular exponentiation. On certain CPUs, a local attacker could possibly use this issue to recover RSA keys. This flaw is known as CacheBleed. Adam Langley discovered that OpenSSL incorrectly handled memory when parsing DSA private keys. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2016-0702, CVE-2016-0705, CVE-2016-0797, CVE-2016-0798, CVE-2016-0799
SHA-256 | b41695e06cd41d2e76d57c53c67028225e7af5f7b366b2f6f536e19119d0ae4b
Debian Security Advisory 3500-1
Posted Mar 2, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3500-1 - Several vulnerabilities were discovered in OpenSSL, a Secure Socket Layer toolkit.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2016-0702, CVE-2016-0705, CVE-2016-0797, CVE-2016-0798, CVE-2016-0799
SHA-256 | 3f9c70f25ffb5429b54fefdf73340747e4caeeb652fd96453dd3848535c499db
OpenSSL Toolkit 1.0.2g
Posted Mar 1, 2016
Site openssl.org

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide.

Changes: Disabled weak ciphers in SSLv3 and up in default builds of OpenSSL. Disabled SSLv2 default build, default negotiation and weak ciphers. Fixed a double-free in DSA code. Various other security issues addressed.
tags | tool, encryption, protocol
systems | unix
advisories | CVE-2016-0702, CVE-2016-0705, CVE-2016-0797, CVE-2016-0798, CVE-2016-0799
SHA-256 | b784b1b3907ce39abf4098702dade6365522a253ad1552e267a9a0e89594aa33
OpenSSL Security Advisory 20160301
Posted Mar 1, 2016
Site openssl.org

OpenSSL Security Advisory 20160301 - A cross-protocol attack was discovered that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. Note that traffic between clients and non-vulnerable servers can be decrypted provided another server supporting SSLv2 and EXPORT ciphers (even with a different protocol such as SMTP, IMAP or POP) shares the RSA keys of the non-vulnerable server. This vulnerability is known as DROWN (CVE-2016-0800). Other issues were also addressed.

tags | advisory, imap, protocol
advisories | CVE-2015-0293, CVE-2015-3197, CVE-2016-0702, CVE-2016-0703, CVE-2016-0704, CVE-2016-0705, CVE-2016-0797, CVE-2016-0798, CVE-2016-0799, CVE-2016-0800
SHA-256 | 01a1884d87908b83b7d1ea8457725884e3808b62f9b3c4b5d54e2a07a55e9dd8
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