Log Message:
Update to 4.2.12

Changelog:
This release is a security release which addresses the following
vulnerabilities:

RT 4.0.0 and above are vulnerable to a cross-site scripting (XSS) attack via
the user and group rights management pages.  This vulnerability is assigned
CVE-2015-5475.  It was discovered and reported by Marcin Kopeć at Data \ 
Reliance
Shared Service Center.

RT 4.2.0 and above are vulnerable to a cross-site scripting (XSS) attack
via the cryptography interface.  This vulnerability could allow an attacker
with a carefully-crafted key to inject JavaScript into RT's user interface.
Installations which use neither GnuPG nor S/MIME are unaffected.