Off-by-one Error Affecting glibc-langpack-cmn package, versions <0:2.28-164.el8_5.3


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-GLIBCLANGPACKCMN-2336634
  • published12 Jan 2022
  • disclosed11 Jan 2022

Introduced: 11 Jan 2022

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

How to fix?

Upgrade RHEL:8 glibc-langpack-cmn to version 0:2.28-164.el8_5.3 or higher.
This issue was patched in RHSA-2022:0896.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-langpack-cmn package and not the glibc-langpack-cmn package as distributed by RHEL. See How to fix? for RHEL:8 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