critical
9.1
CWE
125
Advisory Published
Updated

CVE-2021-33643

First published: Tue Aug 09 2022(Updated: )

An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.

Credit: securities@openeuler.org

Affected SoftwareAffected VersionHow to fix
CentOS Libtar<1.2.21
openEuler=20.03-sp1
openEuler=20.03-sp3
openEuler=22.03
Fedora=35
Fedora=36
Fedora=37

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-33643?

    The severity of CVE-2021-33643 is classified as a medium vulnerability due to the potential for an out-of-bounds read.

  • How do I fix CVE-2021-33643?

    To fix CVE-2021-33643, upgrade to a patched version of libtar that addresses this vulnerability.

  • Which versions of libtar are affected by CVE-2021-33643?

    CVE-2021-33643 affects libtar versions prior to 1.2.21.

  • What types of systems are vulnerable to CVE-2021-33643?

    CVE-2021-33643 impacts systems running vulnerable versions of Huawei openEuler and Fedora.

  • What could happen if CVE-2021-33643 is exploited?

    If exploited, CVE-2021-33643 could lead to unintended memory access, potentially resulting in information leakage.

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