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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.
Publish Date : 2013-11-08 Last Update Date : 2013-11-30
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- CVSS Scores & Vulnerability Types

CVSS Score
6.0
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 264

- Related OVAL Definitions

Title Definition Id Class Family
AIX OpenSSH Vulnerability oval:org.mitre.oval:def:22458 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2013-4548

# Product Type Vendor Product Version Update Edition Language
1 Application Openbsd Openssh 6.2 Version Details Vulnerabilities
2 Application Openbsd Openssh 6.3 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Openbsd Openssh 2

- References For CVE-2013-4548

http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
SUSE openSUSE-SU-2013:1726
http://www.ubuntu.com/usn/USN-2014-1
UBUNTU USN-2014-1
http://openwall.com/lists/oss-security/2013/11/08/3
MLIST [oss-security] 20131107 Re: CVE Request - OpenSSH
http://www.openssh.com/txt/gcmrekey.adv CONFIRM

- Metasploit Modules Related To CVE-2013-4548

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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