Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 63.7%
CVSS Severity
CVSS v2 Score 6.0
References
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
- http://marc.info/?l=bugtraq&m=141576985122836&w=2
- http://marc.info/?l=bugtraq&m=141576985122836&w=2
- http://openwall.com/lists/oss-security/2013/11/08/3
- http://www.openssh.com/txt/gcmrekey.adv
- 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
- http://marc.info/?l=bugtraq&m=141576985122836&w=2
- http://openwall.com/lists/oss-security/2013/11/08/3
- http://www.openssh.com/txt/gcmrekey.adv
- http://www.ubuntu.com/usn/USN-2014-1