Use After Free Affecting bash-doc package, versions <0:4.2.46-28.el7


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-RHEL7-BASHDOC-5159611
  • published26 Jul 2021
  • disclosed17 Nov 2016

Introduced: 17 Nov 2016

CVE-2016-9401  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:7 bash-doc to version 0:4.2.46-28.el7 or higher.
This issue was patched in RHSA-2017:1931.

NVD Description

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

popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.

CVSS Scores

version 3.1