CVE-2015-6563
Publication date 24 August 2015
Last updated 6 June 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openssh | ||
| 14.04 LTS trusty |
Fixed 1:6.6p1-2ubuntu2.2
|
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.4 · Medium
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
References
Other references
- https://anongit.mindrot.org/openssh.git/commit/?id=d4697fe9a28dab7255c60433e4dd23cf7fce8a8b
- http://www.openwall.com/lists/oss-security/2015/08/11/9
- https://github.com/openssh/openssh-portable/commit/d4697fe9a28dab7255c60433e4dd23cf7fce8a8b
- http://www.openwall.com/lists/oss-security/2015/08/22/1
- http://www.openssh.com/txt/release-7.0
- http://seclists.org/fulldisclosure/2015/Aug/54
- https://www.cve.org/CVERecord?id=CVE-2015-6563