Zarafa WebAccess 4.1 and WebApp uses world-readable permissions for the files in their tmp directory, which allows local users to obtain sensitive information by reading temporary session data.
https://exchange.xforce.ibmcloud.com/vulnerabilities/95453
http://www.securityfocus.com/bid/69369
http://www.mandriva.com/security/advisories?name=MDVSA-2014:182
http://seclists.org/oss-sec/2014/q3/445