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Off-by-one Error Affecting glibc package, versions <2.31-13+deb11u4

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
7.8 high
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SUSE
7.4 high
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Red Hat
7.4 high

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  • Snyk ID SNYK-DEBIAN11-GLIBC-2340919
  • published 14 Jan 2022
  • disclosed 24 Aug 2022
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Introduced: 14 Jan 2022

CVE-2021-3999 Open this link in a new tab
CWE-193 Open this link in a new tab

How to fix?

Upgrade Debian:11 glibc to version 2.31-13+deb11u4 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:11 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.