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CVE-2017-14121

5.5 · MEDIUM

The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive.

Published Sep 3, 2017CWE-476EPSS 1.12%

Overview

CVE-2017-14121 is a medium-severity vulnerability. It was published on September 3, 2017 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.

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

Refwww.openwall.com/lists/oss-security/2017/08/20/1Refbugs.debian.org/874061Reflists.debian.org/debian-lts-announce/2021/02/msg00026.htmlRefwww.openwall.com/lists/oss-security/2017/08/20/1Refbugs.debian.org/874061Reflists.debian.org/debian-lts-announce/2021/02/msg00026.html

How CyberStrike helps

Frequently asked questions

What is CVE-2017-14121?

CVE-2017-14121 is a medium-severity vulnerability. It was published on September 3, 2017 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2017-14121?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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-2017-14121?

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-2017-14121?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-14121 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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