Issued:

2010-12-13

Updated:

2010-12-13

RHSA-2010:0977 - Moderate: openssl security update

Synopsis

Moderate: openssl security update

Type/Severity

Security Advisory Moderate

Topic

Updated openssl packages that fix three 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.

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, CVE-2008-7270)

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.

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 possibly crash an application using the OpenSSL library and its UBSEC hardware engine support. (CVE-2009-3245)

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.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

Updated Packages

• openssl-devel-0.9.7a-43.17.el4_8.6.x86_64.rpm
• openssl-devel-0.9.7a-43.17.el4_8.6.ia64.rpm
• openssl-perl-0.9.7a-43.17.el4_8.6.s390x.rpm
• openssl-0.9.7a-43.17.el4_8.6.ppc.rpm
• openssl-devel-0.9.7a-43.17.el4_8.6.s390x.rpm
• openssl-0.9.7a-43.17.el4_8.6.ia64.rpm
• openssl-perl-0.9.7a-43.17.el4_8.6.ppc.rpm
• openssl-perl-0.9.7a-43.17.el4_8.6.ia64.rpm
• openssl-devel-0.9.7a-43.17.el4_8.6.ppc64.rpm
• openssl-0.9.7a-43.17.el4_8.6.i686.rpm
• openssl-perl-0.9.7a-43.17.el4_8.6.x86_64.rpm
• openssl-0.9.7a-43.17.el4_8.6.i386.rpm
• openssl-devel-0.9.7a-43.17.el4_8.6.ppc.rpm
• openssl-devel-0.9.7a-43.17.el4_8.6.i386.rpm
• openssl-0.9.7a-43.17.el4_8.6.src.rpm
• openssl-perl-0.9.7a-43.17.el4_8.6.i386.rpm
• openssl-0.9.7a-43.17.el4_8.6.ppc64.rpm
• openssl-devel-0.9.7a-43.17.el4_8.6.s390.rpm
• openssl-perl-0.9.7a-43.17.el4_8.6.s390.rpm
• openssl-0.9.7a-43.17.el4_8.6.x86_64.rpm
• openssl-0.9.7a-43.17.el4_8.6.s390.rpm
• openssl-0.9.7a-43.17.el4_8.6.s390x.rpm

Fixes

• This content is not included.BZ - 570924
• This content is not included.BZ - 659462
• This content is not included.BZ - 660650

CVEs

• CVE-2009-3245
• CVE-2010-4180
• CVE-2008-7270

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.