Topic

An updated mailman package that fixes multiple security issues is now
available for Red Hat Enterprise Linux 6.

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

Mailman is a program used to help manage email discussion lists.

Multiple input sanitization flaws were found in the way Mailman displayed
usernames of subscribed users on certain pages. If a user who is subscribed
to a mailing list were able to trick a victim into visiting one of those
pages, they could perform a cross-site scripting (XSS) attack against the
victim. (CVE-2011-0707)

Multiple input sanitization flaws were found in the way Mailman displayed
mailing list information. A mailing list administrator could use this flaw
to conduct a cross-site scripting (XSS) attack against victims viewing a
list's "listinfo" page. (CVE-2010-3089)

Red Hat would like to thank Mark Sapiro for reporting these issues.

Users of mailman should upgrade to this updated package, which contains
backported patches to correct these issues.

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/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 631881 - CVE-2010-3089 mailman: Multiple security flaws leading to cross-site scripting (XSS) attacks
• BZ - 677375 - CVE-2011-0707 Mailman: Three XSS flaws due improper escaping of the full name of the member

CVEs

• CVE-2010-3089
• CVE-2011-0707

References

• https://access.redhat.com/security/updates/classification/#moderate