CVE-2013-4548
EPSS 0.30%
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.
How to fix CVE-2013-4548
To remediate CVE-2013-4548, upgrade the affected package to a fixed version below.
- Debian/openssh—upgrade to 1:6.4p1-1 or later
Is CVE-2013-4548 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:6.4p1-1