Red Hat Security Advisory
Synopsis: Moderate: mutt security update
Advisory ID: RHSA-2011:0959-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-0959.html
Issue date: 2011-07-19
CVE Names: CVE-2011-1429
An updated mutt package that fixes one security issue is now available for
Red Hat Enterprise Linux 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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (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
Mutt is a text-mode mail user agent.
A flaw was found in the way Mutt verified SSL certificates. When a server
presented an SSL certificate chain, Mutt could ignore a server hostname
check failure. A remote attacker able to get a certificate from a trusted
Certificate Authority could use this flaw to trick Mutt into accepting a
certificate issued for a different hostname, and perform man-in-the-middle
attacks against Mutt's SSL connections. (CVE-2011-1429)
All Mutt users should upgrade to this updated package, which contains a
backported patch to correct this issue. All running instances of Mutt must
be restarted for this update to take effect.
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
5. Bugs fixed (http://bugzilla.redhat.com/):
688755 - CVE-2011-1429 mutt: SSL host name check may be skipped when verifying certificate chain