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...
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 likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2013-4548- CVSS 2.0
- 6.0 Medium
AV:N/AC:M/Au:S/C:P/I:P/A:P - Weakness
- CWE-264
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2013-4548- Updated
- 2026-11-02
EUVDEUVD-2013-4407 No score
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.
- Record
EUVD-2013-4407- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wg6r-5vgg-89fv No score
The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES...
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.
- Record
GHSA-wg6r-5vgg-89fv- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2013-4548- Updated
- 2026-11-02
OSVDEBIAN-CVE-2013-4548 No score
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.
- Record
DEBIAN-CVE-2013-4548- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2013-4548 is a medium vulnerability (CVSS 6.0) in Openbsd Openssh, published November 8, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.67%, the 85th percentile. Fixed in openssh 1:6.4p1-1.
References
openssh.com/txt/gcmrekey.adv
openwall.com/lists/oss-security/2013/11/08/3
marc.info?l=bugtraq&m=141576985122836&w=2
lists.opensuse.org/opensuse-security-announce/2013-11/msg00017.html
ubuntu.com/usn/USN-2014-1
nvd.nist.gov/vuln/detail/CVE-2013-4548
github.com/advisories/GHSA-wg6r-5vgg-89fv
security-tracker.debian.org/tracker/CVE-2013-4548