CVE-2013-4548

Impact:
Moderate
Public Date:
2013-11-07
Bugzilla:
1028418: CVE-2013-4548 openssh: post-auth memory corruption when using AES-GCM cipher

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2013-4548 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

Not vulnerable. This issue did not affect the versions of openssh as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include support for AES-GCM cipher suites.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.5
Base Metrics AV:N/AC:L/Au:S/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 openssh Not affected
Red Hat Enterprise Linux 6 openssh Not affected
Red Hat Enterprise Linux 5 openssh Not affected

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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