Red Hat: 2013:1779-01: mod_nss: Moderate Advisory
Summary
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.
Summary
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
References
https://www.redhat.com/security/data/cve/CVE-2013-4566.html https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386:
mod_nss-1.0.8-8.el5_10.i386.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.i386.rpm
x86_64:
mod_nss-1.0.8-8.el5_10.x86_64.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386:
mod_nss-1.0.8-8.el5_10.i386.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.i386.rpm
ia64:
mod_nss-1.0.8-8.el5_10.ia64.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.ia64.rpm
ppc:
mod_nss-1.0.8-8.el5_10.ppc.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.ppc.rpm
s390x:
mod_nss-1.0.8-8.el5_10.s390x.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.s390x.rpm
x86_64:
mod_nss-1.0.8-8.el5_10.x86_64.rpm
mod_nss-debuginfo-1.0.8-8.el5_10.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386:
mod_nss-1.0.8-19.el6_5.i686.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.i686.rpm
x86_64:
mod_nss-1.0.8-19.el6_5.x86_64.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64:
mod_nss-1.0.8-19.el6_5.x86_64.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
i386:
mod_nss-1.0.8-19.el6_5.i686.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.i686.rpm
ppc64:
mod_nss-1.0.8-19.el6_5.ppc64.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.ppc64.rpm
s390x:
mod_nss-1.0.8-19.el6_5.s390x.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.s390x.rpm
x86_64:
mod_nss-1.0.8-19.el6_5.x86_64.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
i386:
mod_nss-1.0.8-19.el6_5.i686.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.i686.rpm
x86_64:
mod_nss-1.0.8-19.el6_5.x86_64.rpm
mod_nss-debuginfo-1.0.8-19.el6_5.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
Topic
An updated mod_nss package that fixes one security issue is now availablefor Red Hat Enterprise Linux 5 and 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.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, 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 Workstation (v. 6) - i386, x86_64
Bugs Fixed
1016832 - CVE-2013-4566 mod_nss: incorrect handling of NSSVerifyClient in directory context