CVE-2013-0798
Mozilla Firefox before 20.0 on Android uses world-writable and world-readable permissions for the app_tmp installation directory in the local filesystem, which allows attackers to modify add-ons before installation via an application that leverages the time window during which app_tmp is used.
Date published : 2013-04-03
http://www.mozilla.org/security/announce/2013/mfsa2013-33.html