CVE-2013-4548

The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.

Date published : 2013-11-08

http://www.openssh.com/txt/gcmrekey.adv

http://marc.info/?l=bugtraq&m=141576985122836&w=2