Off-by-one Error Affecting glibc-langpack-fil package, versions <0:2.26-61.amzn2


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-AMZN2-GLIBCLANGPACKFIL-3058948
  • published22 Oct 2022
  • disclosed24 Aug 2022

Introduced: 24 Aug 2022

CVE-2021-3999  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 glibc-langpack-fil to version 0:2.26-61.amzn2 or higher.
This issue was patched in ALAS2-2022-1857.

NVD Description

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

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

CVSS Scores

version 3.1