CVE-2013-4548
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1:6.4p1-1 |
| debian | bullseye | fixed | 1:6.4p1-1 |
| debian | forky | fixed | 1:6.4p1-1 |
| debian | sid | fixed | 1:6.4p1-1 |
| debian | trixie | fixed | 1:6.4p1-1 |
References
- 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
- http://www.ubuntu.com/usn/USN-2014-1
- https://security-tracker.debian.org/tracker/CVE-2013-4548
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.