Use After Free Affecting openssh package, versions <0:5.3p1-117.el6


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.6% (45th percentile)

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  • Snyk IDSNYK-RHEL6-OPENSSH-1505972
  • published26 Jul 2021
  • disclosed11 Aug 2015

Introduced: 11 Aug 2015

CVE-2015-6564  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:6 openssh to version 0:5.3p1-117.el6 or higher.
This issue was patched in RHSA-2016:0741.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by RHEL. See How to fix? for RHEL:6 relevant fixed versions and status.

Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.

CVSS Base Scores

version 3.1