Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openbsd | Openssh | <= 6.9 |
Related Weaknesses (CWE)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.htm
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
- http://rhn.redhat.com/errata/RHSA-2016-0741.html
- http://seclists.org/fulldisclosure/2015/Aug/54
- http://www.openssh.com/txt/release-7.0Vendor Advisory
- http://www.openwall.com/lists/oss-security/2015/08/22/1
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.h
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.h
- http://www.securityfocus.com/bid/76317
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://github.com/openssh/openssh-portable/commit/5e75f5198769056089fb06c4d738a
- https://kc.mcafee.com/corporate/index?page=content&id=SB10136
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://security.gentoo.org/glsa/201512-04
FAQ
What is CVE-2015-6564?
CVE-2015-6564 is a vulnerability with a CVSS score of 6.9 (MEDIUM). 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...
How severe is CVE-2015-6564?
CVE-2015-6564 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-6564?
Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openssh.