Improper Input Validation Affecting openssh-ldap package, versions <0:6.2p2-8.45.amzn1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-AMZN201803-OPENSSHLDAP-1690291
  • published27 Sept 2021
  • 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 Amazon-Linux:2018.03 openssh-ldap to version 0:6.2p2-8.45.amzn1 or higher.
This issue was patched in ALAS-2015-592.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-ldap package and not the openssh-ldap package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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 Scores

version 3.1