UpHeron
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Servers and applications

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.

Severity
Medium 6.0
Published
8 Nov 2013
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSHServers and applications · cpe:a:openbsd:openssh
  • Version 6.2
  • Version 6.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2013-4548
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2013-4548