high
7.8
CWE
59
Advisory Published
CVE Published
Updated

CVE-2021-31566

First published: Wed Nov 17 2021(Updated: )

An improper link resolution flaw can occur while extracting an archive leading to changing modes, times, access control lists, and flags of a file outside of the archive. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to gain more privileges in a system.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/libarchive<3.5.2
3.5.2
Libarchive Libarchive<3.5.2
Fedoraproject Fedora=35
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.6
Redhat Enterprise Linux For Ibm Z Systems=8.0
Redhat Enterprise Linux For Ibm Z Systems Eus=8.6
Redhat Enterprise Linux For Power Little Endian=8.0
Redhat Enterprise Linux For Power Little Endian Eus=8.6
Redhat Enterprise Linux Server Aus=8.6
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.6
Redhat Enterprise Linux Server Tus=8.6
Redhat Codeready Linux Builder
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.6
Redhat Enterprise Linux For Ibm Z Systems=8.0
Redhat Enterprise Linux For Ibm Z Systems Eus=8.6
Redhat Enterprise Linux For Power Little Endian=8.0
Redhat Enterprise Linux For Power Little Endian Eus=8.6
Debian Debian Linux=10.0
All of
Redhat Codeready Linux Builder
Any of
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.6
Redhat Enterprise Linux For Ibm Z Systems=8.0
Redhat Enterprise Linux For Ibm Z Systems Eus=8.6
Redhat Enterprise Linux For Power Little Endian=8.0
Redhat Enterprise Linux For Power Little Endian Eus=8.6
Splunk Universal Forwarder>=8.2.0<8.2.12
Splunk Universal Forwarder>=9.0.0<9.0.6
Splunk Universal Forwarder=9.1.0

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2024237

Remedy

https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043

Remedy

https://github.com/libarchive/libarchive/issues/1566

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-31566?

    CVE-2021-31566 is a vulnerability in the Libarchive library that allows an attacker to change the modes, times, access control lists, and flags of a file outside of an archive when it is extracted.

  • How does CVE-2021-31566 occur?

    CVE-2021-31566 occurs due to an improper link resolution flaw in the Libarchive library.

  • What is the severity of CVE-2021-31566?

    CVE-2021-31566 has a severity rating of high, with a CVSS score of 7.8.

  • Which software is affected by CVE-2021-31566?

    The Libarchive library version up to exclusive 3.5.2, Fedora 35, and various versions of Redhat Enterprise Linux are affected by CVE-2021-31566.

  • How can I fix CVE-2021-31566?

    To fix CVE-2021-31566, update the Libarchive library to version 3.5.2 or later.

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