Issued:

2013-12-03

Updated:

2013-12-03

RHSA-2013:1779 - Moderate: mod_nss security update

Synopsis

Moderate: mod_nss security update

Type/Severity

Security Advisory Moderate

Topic

An updated mod_nss package that fixes one security issue is now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Description

The mod_nss module provides strong cryptography for the Apache HTTP Server via the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, using the Network Security Services (NSS) security library.

A flaw was found in the way mod_nss handled the NSSVerifyClient setting for the per-directory context. When configured to not require a client certificate for the initial connection and only require it for a specific directory, mod_nss failed to enforce this requirement and allowed a client to access the directory when no valid client certificate was provided. (CVE-2013-4566)

Red Hat would like to thank Albert Smith of OUSD(AT&L) for reporting this issue.

All mod_nss users should upgrade to this updated package, which contains a backported patch to correct this issue. The httpd service must be restarted for this update to take effect.

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

Affected Products

Updated Packages

• mod_nss-1.0.8-19.el6_5.ppc64.rpm
• mod_nss-1.0.8-8.el5_10.i386.rpm
• mod_nss-debuginfo-1.0.8-19.el6_5.ppc64.rpm
• mod_nss-debuginfo-1.0.8-19.el6_5.i686.rpm
• mod_nss-debuginfo-1.0.8-8.el5_10.s390x.rpm
• mod_nss-1.0.8-8.el5_10.s390x.rpm
• mod_nss-debuginfo-1.0.8-8.el5_10.ia64.rpm
• mod_nss-1.0.8-19.el6_5.src.rpm
• mod_nss-debuginfo-1.0.8-8.el5_10.i386.rpm
• mod_nss-1.0.8-8.el5_10.x86_64.rpm
• mod_nss-1.0.8-8.el5_10.ppc.rpm
• mod_nss-1.0.8-8.el5_10.src.rpm
• mod_nss-1.0.8-19.el6_5.x86_64.rpm
• mod_nss-debuginfo-1.0.8-19.el6_5.x86_64.rpm
• mod_nss-1.0.8-8.el5_10.ia64.rpm
• mod_nss-debuginfo-1.0.8-19.el6_5.s390x.rpm
• mod_nss-debuginfo-1.0.8-8.el5_10.x86_64.rpm
• mod_nss-debuginfo-1.0.8-8.el5_10.ppc.rpm
• mod_nss-1.0.8-19.el6_5.i686.rpm
• mod_nss-1.0.8-19.el6_5.s390x.rpm

Fixes

• This content is not included.BZ - 1016832

CVEs

• CVE-2013-4566

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.