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Red Hat Enterprise Linux 6: RHSA-2010:0979-01 Moderate OpenSSL Cipher Issue

red hat
Calendar Grey December 13, 2010
Dist Redhat Esm H88
Recent updates for OpenSSL packages have been released for Red Hat Enterprise Linux 6 to mitigate a moderate vulnerability associated with ciphersuite configurations.
Updated openssl packages that fix one security issue are now available for Red Hat Enterprise Linux 6

Solution

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at

Summary

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 ciphersuite downgrade flaw was found in the OpenSSL SSL/TLS server code. A remote attacker could possibly use this flaw to change the ciphersuite associated with a cached session stored on the server, if the server enabled the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG option, possibly forcing the client to use a weaker ciphersuite after resuming the session. (CVE-2010-4180)
Note: With this update, setting the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG option has no effect and this bug workaround can no longer be enabled.
All OpenSSL users should upgrade to these updated packages, which contain a backported patch to resolve this issue. For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat Enterprise Linux openssl network attack ciphersuite

References

https://access.redhat.com/security/cve/CVE-2010-4180 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: openssl-1.0.0-4.el6_0.2.i686.rpm openssl-debuginfo-1.0.0-4.el6_0.2.i686.rpm
x86_64: openssl-1.0.0-4.el6_0.2.i686.rpm openssl-1.0.0-4.el6_0.2.x86_64.rpm openssl-debuginfo-1.0.0-4.el6_0.2.i686.rpm openssl-debuginfo-1.0.0-4.el6_0.2.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386: openssl-debuginfo-1.0.0-4.el6_0.2.i686.rpm openssl-devel-1.0.0-4.el6_0.2.i686.rpm openssl-perl-1.0.0-4.el6_0.2.i686.rpm openssl-static-1.0.0-4.el6_0.2.i686.rpm
x86_64: openssl-debuginfo-1.0.0-4.el6_0.2.i686.rpm openssl-debuginfo-1.0.0-4.el6_0.2.x86_64.rpm openssl-devel-1.0.0-4.el6_0.2.i686.rpm openssl-devel-1.0.0-4.el6_0.2.x86_64.rpm openssl-perl-1.0.0-4.el6_0.2.x86_64.rpm openssl-static-1.0.0-4.el6_0.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: openssl-1.0.0-4.el6_0.2.i686.rpm openssl-1.0.0-4.el6_0.2.x86_64.rpm openssl-debuginfo-1.0.0-4.el6_0.2.i686.rpm openssl-debuginfo-1.0.0-4.el6_0.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64: openssl-debuginfo-1.0.0-4.el6_0.2.i686.rpm openssl-debuginfo-1.0.0-4.el6_0.2.x86_64.rpm openssl-devel-1.0.0-4.el6_0.2.i686.rpm openssl-devel-1.0.0-4.el6_0.2.x86_64.rpm openssl-perl-1.0.0-4.el6_0.2.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2010:0979-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2010:0979.html
Issue date: 2010-12-13

Topic

Updated openssl packages that fix one security issue are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat Enterprise Linux openssl network attack ciphersuite

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

659462 - CVE-2010-4180 openssl: NETSCAPE_REUSE_CIPHER_CHANGE_BUG ciphersuite downgrade attack

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