A certain Red Hat patch for SquirrelMail 1.4.8 sets the same SQMSESSID cookie value for all sessions, which allows remote authenticated users to access other users' folder lists and configuration data in opportunistic circumstances by using the standard webmail.php interface. NOTE: this vulnerability exists because of an incorrect fix for CVE-2008-3663.
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00002.html
https://bugzilla.redhat.com/show_bug.cgi?id=480224
https://bugzilla.redhat.com/show_bug.cgi?id=480488
http://secunia.com/advisories/33611
http://securitytracker.com/id?1021611
https://exchange.xforce.ibmcloud.com/vulnerabilities/48115
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10366