6.8 - RHSA-2009:1066

Problem Description:

An updated squirrelmail package that fixes multiple security issues is now available for Red Hat Enterprise Linux 3, 4, and 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - noarch Red Hat Desktop version 3 - noarch Red Hat Enterprise Linux ES version 3 - noarch Red Hat Enterprise Linux WS version 3 - noarch Red Hat Enterprise Linux AS version 4 - noarch Red Hat Enterprise Linux Desktop version 4 - noarch Red Hat Enterprise Linux ES version 4 - noarch Red Hat Enterprise Linux WS version 4 - noarch RHEL Desktop Workstation (v. 5 client) - noarch Red Hat Enterprise Linux (v. 5 server) - noarch

3. Description:

SquirrelMail is a standards-based webmail package written in PHP.

A server-side code injection flaw was found in the SquirrelMail "map_yp_alias" function. If SquirrelMail was configured to retrieve a user's IMAP server address from a Network Information Service (NIS) server via the "map_yp_alias" function, an unauthenticated, remote attacker using a specially-crafted username could use this flaw to execute arbitrary code with the privileges of the web server. (CVE-2009-1579)

Multiple cross-site scripting (XSS) flaws were found in SquirrelMail. An attacker could construct a carefully crafted URL, which once visited by an unsuspecting user, could cause the user's web browser to execute malicious script in the context of the visited SquirrelMail web page. (CVE-2009-1578)

It was discovered that SquirrelMail did not properly sanitize Cascading Style Sheets (CSS) directives used in HTML mail. A remote attacker could send a specially-crafted email that could place mail content above SquirrelMail's controls, possibly allowing phishing and cross-site scripting attacks. (CVE-2009-1581)

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

4. Solution:

Before applying this update, make sure that all previously-released errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

500356 - CVE-2009-1581 SquirrelMail: CSS positioning vulnerability 500360 - CVE-2009-1579 SquirrelMail: Server-side code injection in map_yp_alias username map 500363 - CVE-2009-1578 SquirrelMail: Multiple cross site scripting issues