Use After Free Affecting bash-doc package, versions <0:4.2.46-28.37.amzn1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-AMZN201803-BASHDOC-1708086
  • published27 Sept 2021
  • disclosed23 Jan 2017

Introduced: 23 Jan 2017

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

How to fix?

Upgrade Amazon-Linux:2018.03 bash-doc to version 0:4.2.46-28.37.amzn1 or higher.
This issue was patched in ALAS-2017-878.

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 Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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 Base Scores

version 3.1