Use After Free Affecting glibc-langpack-unm package, versions <0:2.26-37.amzn2


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.11% (47th percentile)

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  • Snyk IDSNYK-AMZN2-GLIBCLANGPACKUNM-5882099
  • published6 Sept 2023
  • disclosed30 Apr 2020

Introduced: 30 Apr 2020

CVE-2020-1752  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 glibc-langpack-unm to version 0:2.26-37.amzn2 or higher.
This issue was patched in ALAS2-2023-2221.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-langpack-unm package and not the glibc-langpack-unm package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

CVSS Scores

version 3.1