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CVE-2021-23177

7.8 · HIGH

An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link.

Published Aug 23, 2022CWE-59EPSS 0.39%

Overview

CVE-2021-23177 is a high-severity vulnerability. It was published on August 23, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/security/cve/CVE-2021-23177Refbugzilla.redhat.com/show_bug.cgi?id=2024245GitHubgithub.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336badGitHubgithub.com/libarchive/libarchive/issues/1565Reflists.debian.org/debian-lts-announce/2022/11/msg00030.htmlRefaccess.redhat.com/security/cve/CVE-2021-23177Refbugzilla.redhat.com/show_bug.cgi?id=2024245GitHubgithub.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336badGitHubgithub.com/libarchive/libarchive/issues/1565Reflists.debian.org/debian-lts-announce/2022/11/msg00030.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-23177?

CVE-2021-23177 is a high-severity vulnerability. It was published on August 23, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-23177?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-23177?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-23177?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-23177 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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