National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2013-4548 Detail

Current Description

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.

Source:  MITRE
Description Last Modified:  11/08/2013
View Analysis Description

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 6.0 MEDIUM
Vector: (AV:N/AC:M/Au:S/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 6.8

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): Single
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
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 Vendor Advisory
http://www.ubuntu.com/usn/USN-2014-1

Technical Details

Vulnerability Type (View All)

  • Permissions, Privileges, and Access Control (CWE-264)

Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2013-4548
NVD Published Date:
11/08/2013
NVD Last Modified:
11/20/2015