Off-by-one Error Affecting glibc package, versions <2.33-4


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-GLIBC-2340909
  • published14 Jan 2022
  • disclosed24 Aug 2022

Introduced: 14 Jan 2022

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

How to fix?

Upgrade Debian:unstable glibc to version 2.33-4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Debian. See How to fix? for Debian:unstable 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