Improper Input Validation Affecting openssh-keycat package, versions <0:6.6.1p1-22.el7


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.38% (31st percentile)

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  • Snyk IDSNYK-ORACLE7-OPENSSHKEYCAT-2498939
  • published10 Apr 2022
  • disclosed24 Aug 2015

Introduced: 24 Aug 2015

CVE-2015-6563  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Oracle:7 openssh-keycat to version 0:6.6.1p1-22.el7 or higher.
This issue was patched in ELSA-2015-2088.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-keycat package and not the openssh-keycat package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

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 Base Scores

version 3.1