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CVE-2022-21716

7.5 · HIGH

Twisted is an event-based framework for internet applications, supporting Python 3.6+.

Published Mar 3, 2022CWE-120EPSS 3.51%

Overview

CVE-2022-21716 is a high-severity vulnerability. It was published on March 3, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 < /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.

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/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9GitHubgithub.com/twisted/twisted/releases/tag/twisted-22.2.0GitHubgithub.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgxReflists.debian.org/debian-lts-announce/2022/03/msg00009.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/Refsecurity.gentoo.org/glsa/202301-02Reftwistedmatrix.com/trac/ticket/10284Refwww.oracle.com/security-alerts/cpuapr2022.htmlGitHubgithub.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9

How CyberStrike helps

Frequently asked questions

What is CVE-2022-21716?

CVE-2022-21716 is a high-severity vulnerability. It was published on March 3, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-21716?

This vulnerability has a CVSS 3.1 base score of 7.5, 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-2022-21716?

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-2022-21716?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-21716 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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