Published: 08/11/2013 Updated: 09/10/2019

CVSS v2 Base Score: 6 | Impact Score: 6.4 | Exploitability Score: 6.8

VMScore: 534

Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P

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.

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openbsd openssh 6.3
openbsd openssh 6.2

Debian Bug report logs - #729029 openssh: CVE-2013-4548: Memory corruption in AES-GCM support Package: openssh; Maintainer for openssh is Debian OpenSSH Maintainers <debian-ssh@listsdebianorg>; Reported by: Moritz Muehlenhoff <jmm@inutilorg> Date: Fri, 8 Nov 2013 05:48:02 UTC Severity: grave Tags: fixed-upstream, ...

OpenSSH could be made to run programs if it received specially crafted network traffic from an authenticated user ...

CWE-264 http://www.openssh.com/txt/gcmrekey.adv http://openwall.com/lists/oss-security/2013/11/08/3 http://www.ubuntu.com/usn/USN-2014-1 http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html http://marc.info/?l=bugtraq&m=141576985122836&w=2 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=729029 https://usn.ubuntu.com/2014-1/https://nvd.nist.gov

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CVE-2013-4548

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