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

medium

Snyk CVSS

    Attack Complexity High
    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-AMZN2-GLIBCCOMMON-3058964
  • published 22 Oct 2022
  • disclosed 24 Aug 2022
Report a new vulnerability Found a mistake?

Introduced: 24 Aug 2022

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

How to fix?

Upgrade Amazon-Linux:2 glibc-common 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-common package and not the glibc-common 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.