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CVE-2021-21289

7.4 · HIGH

Mechanize is an open-source ruby library that makes automated web interaction easy.

Published Feb 2, 2021CWE-78EPSS 3.51%

Overview

CVE-2021-21289 is a high-severity vulnerability. It was published on February 2, 2021 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Mechanize is an open-source ruby library that makes automated web interaction easy. In Mechanize from version 2.0.0 and before version 2.7.7 there is a command injection vulnerability. Affected versions of mechanize allow for OS commands to be injected using several classes' methods which implicitly use Ruby's Kernel.open method. Exploitation is possible only if untrusted input is used as a local filename and passed to any of these calls: Mechanize::CookieJar#load, Mechanize::CookieJar#save_as, Mechanize#download, Mechanize::Download#save, Mechanize::File#save, and Mechanize::FileResponse#read_body. This is fixed in version 2.7.7.

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

GitHubgithub.com/sparklemotion/mechanize/commit/66a6a1bfa653a5f13274a396a5e5441238656aa0GitHubgithub.com/sparklemotion/mechanize/releases/tag/v2.7.7GitHubgithub.com/sparklemotion/mechanize/security/advisories/GHSA-qrqm-fpv6-6r8gReflists.debian.org/debian-lts-announce/2021/02/msg00021.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LBVVJUL4P4KCJH4IQTHFZ4ATXY7XXZPV/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNFZ7ROYS6V4J5L5PRAJUG2AWC7VXR2V/Refrubygems.org/gems/mechanize/Refsecurity.gentoo.org/glsa/202107-17GitHubgithub.com/sparklemotion/mechanize/commit/66a6a1bfa653a5f13274a396a5e5441238656aa0GitHubgithub.com/sparklemotion/mechanize/releases/tag/v2.7.7

How CyberStrike helps

Frequently asked questions

What is CVE-2021-21289?

CVE-2021-21289 is a high-severity vulnerability. It was published on February 2, 2021 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2021-21289?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-21289?

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-2021-21289?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-21289 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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