mxcl/homebrew — pull request #23063 by jvz (2013-10-05 18:16:43+00:00)
Title: GPG and GPG2 security updates

What's New in 2.0.22
====================

* Fixed possible infinite recursion in the compressed packet
parser. [CVE-2013-4402]

* Improved support for some card readers.

* Prepared building with the forthcoming Libgcrypt 1.6.

* Protect against rogue keyservers sending secret keys.

What's New in 1.4.15
===========

* Fixed possible infinite recursion in the compressed packet
parser. [CVE-2013-4402]

* Protect against rogue keyservers sending secret keys.

* Use 2048 bit also as default for batch key generation.

* Minor bug fixes.

Impact of the security problem
==============================

Special crafted input data may be used to cause a denial of service
against GPG (GnuPG's OpenPGP part) and some other OpenPGP
implementations. All systems using GPG to process incoming data are
affected.

Taylor R. Campbell invented a neat trick to generate OpenPGP packages
to force GPG to recursively parse certain parts of OpenPGP messages ad
infinitum. As a workaround a tight "ulimit -v" setting may be used to
mitigate the problem. Sample input data to trigger this problem has
not yet been seen in the wild. Details of the attack will eventually
be published by its inventor.