CVE-2013-4351 Information

Description

GnuPG 1.4.x 2.0.x and 2.1.x treats a key flags subpacket with all bits cleared (no usage permitted) as if it has all bits set (all usage permitted) which might allow remote attackers to bypass intended cryptographic protection mechanisms by leveraging the subkey.

Reference

http://lists.opensuse.org/opensuse-updates/2013-10/msg00003.html http://lists.opensuse.org/opensuse-updates/2013-10/msg00006.html http://rhn.redhat.com/errata/RHSA-2013-1459.html http://thread.gmane.org/gmane.comp.encryption.gpg.devel/17712/focus=18138 http://ubuntu.com/usn/usn-1987-1 http://www.debian.org/security/2013/dsa-2773 http://www.debian.org/security/2013/dsa-2774 http://www.openwall.com/lists/oss-security/2013/09/13/4 https://bugzilla.redhat.com/show_bug.cgi?id=1010137