Vulnerability Description
The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openbsd | Openssh | <= 6.9 |
| Apple | Mac Os X | <= 10.11.0 |
Related Weaknesses (CWE)
References
- http://lists.apple.com/archives/security-announce/2015/Oct/msg00005.html
- 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/d4697fe9a28dab7255c60433e4dd2
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://security.gentoo.org/glsa/201512-04
FAQ
What is CVE-2015-6563?
CVE-2015-6563 is a vulnerability with a CVSS score of 6.4 (MEDIUM). The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation at...
How severe is CVE-2015-6563?
CVE-2015-6563 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-6563?
Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openssh, Apple Mac Os X.