Issued:

2012-02-01

Updated:

2012-02-01

RHSA-2012:0086 - Moderate: openssl security update

Synopsis

Moderate: openssl security update

Type/Severity

Security Advisory Moderate

Topic

Updated openssl packages that fix two security issues are now available for Red Hat Enterprise Linux 4.

The Red Hat Security Response Team has rated this update as having moderate 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.

An information leak flaw was found in the SSL 3.0 protocol implementation in OpenSSL. Incorrect initialization of SSL record padding bytes could cause an SSL client or server to send a limited amount of possibly sensitive data to its SSL peer via the encrypted connection. (CVE-2011-4576)

It was discovered that OpenSSL did not limit the number of TLS/SSL handshake restarts required to support Server Gated Cryptography. A remote attacker could use this flaw to make a TLS/SSL server using OpenSSL consume an excessive amount of CPU by continuously restarting the handshake. (CVE-2011-4619)

All OpenSSL users should upgrade to these updated packages, which contain backported patches to resolve 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.

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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• openssl-devel-0.9.7a-43.18.el4.ppc64.rpm
• openssl-0.9.7a-43.18.el4.s390.rpm
• openssl-perl-0.9.7a-43.18.el4.ia64.rpm
• openssl-perl-0.9.7a-43.18.el4.s390x.rpm
• openssl-0.9.7a-43.18.el4.ia64.rpm
• openssl-devel-0.9.7a-43.18.el4.x86_64.rpm
• openssl-0.9.7a-43.18.el4.ppc.rpm
• openssl-devel-0.9.7a-43.18.el4.ia64.rpm
• openssl-devel-0.9.7a-43.18.el4.i386.rpm
• openssl-0.9.7a-43.18.el4.x86_64.rpm
• openssl-perl-0.9.7a-43.18.el4.ppc.rpm
• openssl-0.9.7a-43.18.el4.src.rpm
• openssl-0.9.7a-43.18.el4.i386.rpm
• openssl-0.9.7a-43.18.el4.ppc64.rpm
• openssl-devel-0.9.7a-43.18.el4.s390.rpm
• openssl-perl-0.9.7a-43.18.el4.x86_64.rpm
• openssl-0.9.7a-43.18.el4.s390x.rpm
• openssl-devel-0.9.7a-43.18.el4.s390x.rpm
• openssl-perl-0.9.7a-43.18.el4.i386.rpm
• openssl-perl-0.9.7a-43.18.el4.s390.rpm
• openssl-0.9.7a-43.18.el4.i686.rpm
• openssl-devel-0.9.7a-43.18.el4.ppc.rpm

Fixes

• This content is not included.BZ - 771775
• This content is not included.BZ - 771780

CVEs

• CVE-2011-4576
• CVE-2011-4619

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.