CentOS Errata and Security Advisory CESA-2009:0010
Ivan Markovic discovered a cross-site scripting (XSS) flaw in SquirrelMail caused by insufficient HTML mail sanitization. A remote attacker could send a specially-crafted HTML mail or attachment that could cause a user's Web browser to execute a malicious script in the context of the SquirrelMail session when that email or attachment was opened by the user. (CVE-2008-2379)
It was discovered that SquirrelMail allowed cookies over insecure connections (ie did not restrict cookies to HTTPS connections). An attacker who controlled the communication channel between a user and the SquirrelMail server, or who was able to sniff the user's network communication, could use this flaw to obtain the user's session cookie, if a user made an HTTP request to the server. (CVE-2008-3663)
Note: After applying this update, all session cookies set for SquirrelMail sessions started over HTTPS connections will have the "secure" flag set. That is, browsers will only send such cookies over an HTTPS connection. If needed, you can revert to the previous behavior by setting the configuration option "$only_secure_cookies" to "false" in SquirrelMail's /etc/squirrelmail/config.php configuration file.
Users of squirrelmail should upgrade to this updated package, which contains backported patches to correct these issues.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2009-February/027635.html http://lists.centos.org/pipermail/centos-announce/2009-February/027637.html http://lists.centos.org/pipermail/centos-announce/2009-February/027639.html http://lists.centos.org/pipermail/centos-announce/2009-February/027650.html http://lists.centos.org/pipermail/centos-announce/2009-January/027578.html http://lists.centos.org/pipermail/centos-announce/2009-January/027579.html http://lists.centos.org/pipermail/centos-announce/2009-January/027584.html http://lists.centos.org/pipermail/centos-announce/2009-January/027585.html http://lists.centos.org/pipermail/centos-announce/2009-January/027592.html http://lists.centos.org/pipermail/centos-announce/2009-January/027593.html
Affected packages: squirrelmail
Upstream details at: https://rhn.redhat.com/errata/RHSA-2009-0010.html