Original 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.
Affected software
- OpenSSH ≤ 6.9 exact match
Details
- Published
- 2015-08-24
- Last modified
- 2026-06-17
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H- CWE
- CWE-20
References
- cve.org/CVE-2015-6563
- nvd.nist.gov/vuln/detail/CVE-2015-6563
- lists.apple.com/archives/security-announce/2015/Oct/msg00005.html
- lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html
- lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
- rhn.redhat.com/errata/RHSA-2016-0741.html
- seclists.org/fulldisclosure/2015/Aug/54
- www.openssh.com/txt/release-7.0
- www.openwall.com/lists/oss-security/2015/08/22/1
- www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- www.securityfocus.com/bid/76317
- cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
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