Issued:
2016-03-01
Updated:
2016-03-01

RHSA-2016:0302 - Important: openssl security update

Synopsis

Important: openssl security update

Type/Severity

Security Advisory Important

Topic

Updated openssl packages that fix three security issues are now available for Red Hat Enterprise Linux 5

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) 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 (SSLv2) 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. (CVE-2016-0800)

Note: This issue was addressed by disabling the SSLv2 protocol by default when using the 'SSLv23' connection methods, and removing support for weak SSLv2 cipher suites. It is possible to re-enable the SSLv2 protocol in the 'SSLv23' connection methods by default by setting the OPENSSL_ENABLE_SSL2 environment variable before starting an application that needs to have SSLv2 enabled. For more information, refer to the knowledge base article linked to in the References section.

A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2 ciphers that have been disabled on the server. This could result in weak SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to man-in-the-middle attacks. (CVE-2015-3197)

An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code. (CVE-2016-0797)

Red Hat would like to thank the OpenSSL project for reporting these issues. Upstream acknowledges Nimrod Aviram and Sebastian Schinzel as the original reporters of CVE-2016-0800 and CVE-2015-3197; and Guido Vranken as the original reporter of CVE-2016-0797.

All openssl users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • openssl-debuginfo-0.9.8e-39.el5_11.ia64.rpm
  • openssl-devel-0.9.8e-39.el5_11.x86_64.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.i686.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.i386.rpm
  • openssl-devel-0.9.8e-39.el5_11.s390.rpm
  • openssl-devel-0.9.8e-39.el5_11.i386.rpm
  • openssl-perl-0.9.8e-39.el5_11.ia64.rpm
  • openssl-0.9.8e-39.el5_11.src.rpm
  • openssl-0.9.8e-39.el5_11.i686.rpm
  • openssl-perl-0.9.8e-39.el5_11.x86_64.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.s390x.rpm
  • openssl-0.9.8e-39.el5_11.ia64.rpm
  • openssl-devel-0.9.8e-39.el5_11.ia64.rpm
  • openssl-devel-0.9.8e-39.el5_11.ppc.rpm
  • openssl-perl-0.9.8e-39.el5_11.s390x.rpm
  • openssl-0.9.8e-39.el5_11.x86_64.rpm
  • openssl-0.9.8e-39.el5_11.s390x.rpm
  • openssl-devel-0.9.8e-39.el5_11.s390x.rpm
  • openssl-0.9.8e-39.el5_11.i386.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.s390.rpm
  • openssl-devel-0.9.8e-39.el5_11.ppc64.rpm
  • openssl-perl-0.9.8e-39.el5_11.ppc.rpm
  • openssl-perl-0.9.8e-39.el5_11.i386.rpm
  • openssl-0.9.8e-39.el5_11.s390.rpm
  • openssl-0.9.8e-39.el5_11.ppc64.rpm
  • openssl-0.9.8e-39.el5_11.ppc.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.ppc64.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.x86_64.rpm
  • openssl-debuginfo-0.9.8e-39.el5_11.ppc.rpm

Fixes

CVEs

References

Additional information