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AUSCERT External Security Bulletin Redistribution
Important: mod_auth_mellon security update
6 November 2014
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Existing Account
CVE Names: CVE-2014-8567 CVE-2014-8566
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running mod_auth_mellon check for an updated version of the software
for their operating system.
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Red Hat Security Advisory
Synopsis: Important: mod_auth_mellon security update
Advisory ID: RHSA-2014:1803-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1803.html
Issue date: 2014-11-05
CVE Names: CVE-2014-8566 CVE-2014-8567
An updated mod_auth_mellon package that fixes two security issues is now
available for Red Hat Enterprise Linux 6.
Red Hat Product Security has rated this update as having Important 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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
mod_auth_mellon provides a SAML 2.0 authentication module for the Apache
An information disclosure flaw was found in mod_auth_mellon's session
handling that could lead to sessions overlapping in memory. A remote
attacker could potentially use this flaw to obtain data from another user's
It was found that uninitialized data could be read when processing a user's
logout request. By attempting to log out, a user could possibly cause the
Apache HTTP Server to crash. (CVE-2014-8567)
Red Hat would like to thank the mod_auth_mellon team for reporting these
issues. Upstream acknowledges Matthew Slowe as the original reporter of
All users of mod_auth_mellon are advised to upgrade to this updated
package, which contains a backported patch to correct these issues.
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 (https://bugzilla.redhat.com/):
1157281 - CVE-2014-8566 mod_auth_mellon: remote memory disclosure flaw
1157954 - CVE-2014-8567 mod_auth_mellon: logout processing leads to denial of service
6. Package List:
Red Hat Enterprise Linux Server (v. 6):
Red Hat Enterprise Linux Workstation (v. 6):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2014 Red Hat, Inc.
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