CVE-2015-6564
high
CVSS v3
7.0
CVSS v4 NEW
—
VIR risk
7.0
Description
Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
Predictions
Exploit likelihood
69%
Patch ETA
—
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 | 1:6.9p1-1 |
| debian | bullseye | fixed | 1:6.9p1-1 |
| debian | forky | fixed | 1:6.9p1-1 |
| debian | sid | fixed | 1:6.9p1-1 |
| debian | trixie | fixed | 1:6.9p1-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| openbsd | openssh | {"endIncluding":"6.9"} | |
References
- http://www.openwall.com/lists/oss-security/2015/08/22/1
- http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html
- http://www.securityfocus.com/bid/76317
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- https://security.gentoo.org/glsa/201512-04
- https://kc.mcafee.com/corporate/index?page=content&id=SB10136
- http://www.openssh.com/txt/release-7.0
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- https://github.com/openssh/openssh-portable/commit/5e75f5198769056089fb06c4d738ab0e5abc66f7
- http://rhn.redhat.com/errata/RHSA-2016-0741.html
- http://seclists.org/fulldisclosure/2015/Aug/54
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-764
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://security-tracker.debian.org/tracker/CVE-2015-6564
CWEs
CWE-264 CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.