high
7.8
CWE
59
Advisory Published
CVE Published
Updated

CVE-2021-23177

First published: Wed Nov 17 2021(Updated: )

An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. 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 change the ACL of a file on the system and gain more privileges.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
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
redhat/libarchive<3.5.2
3.5.2

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2024245

Remedy

https://github.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336bad

Remedy

https://github.com/libarchive/libarchive/issues/1565

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-23177?

    CVE-2021-23177 is an improper link resolution flaw in Libarchive that can lead to changing the access control list (ACL) of the target of the link.

  • How does CVE-2021-23177 affect the software?

    CVE-2021-23177 affects Libarchive with a version up to 3.5.2 and Fedora Project Fedora 35.

  • How can an attacker exploit CVE-2021-23177?

    An attacker may provide a malicious archive to a victim user who would trigger this flaw when trying to extract the archive.

  • What is the severity of CVE-2021-23177?

    CVE-2021-23177 has a severity rating of 7.8 (High).

  • How to fix CVE-2021-23177?

    To fix CVE-2021-23177, users should update Libarchive to version 3.5.2 or newer.

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