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.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1500-1 openssh security update
EUVD EUVD EUVD-2015-6502 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 27 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-27T16:11:52.468Z

Reserved: 2015-08-21T00:00:00.000Z

Link: CVE-2015-6563

cve-icon Vulnrichment

Updated: 2024-08-06T07:22:22.366Z

cve-icon NVD

Status : Modified

Published: 2015-08-24T01:59:00.127

Modified: 2026-05-27T17:16:22.720

Link: CVE-2015-6563

cve-icon Redhat

Severity : Moderate

Publid Date: 2015-08-11T00:00:00Z

Links: CVE-2015-6563 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses