Use After Free Affecting bash package, versions <4.3-7ubuntu1.7


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-UBUNTU1404-BASH-351563
  • published23 Jan 2017
  • 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 Ubuntu:14.04 bash to version 4.3-7ubuntu1.7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bash package and not the bash package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 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