high
8.1
CWE
125
Advisory Published
Updated

CVE-2021-33644

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_longname, 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-2021-33644?

    CVE-2021-33644 has a medium severity rating due to the potential for an out-of-bounds read.

  • How do I fix CVE-2021-33644?

    To fix CVE-2021-33644, update to the latest version of libtar that addresses this vulnerability.

  • Which software is affected by CVE-2021-33644?

    CVE-2021-33644 affects various versions of libtar and specific releases of Huawei's openEuler and Fedora.

  • Can CVE-2021-33644 be exploited remotely?

    Yes, CVE-2021-33644 can potentially be exploited by an attacker submitting a crafted tar file.

  • What type of vulnerability is CVE-2021-33644?

    CVE-2021-33644 is classified as a memory corruption vulnerability due to an out-of-bounds read issue.

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