CVE-2022-21716

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.

References

https://www.oracle.com/security-alerts/cpuapr2022.html

https://twistedmatrix.com/trac/ticket/10284

https://security.gentoo.org/glsa/202301-02

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/

https://lists.debian.org/debian-lts-announce/2022/03/msg00009.html

https://github.com/twisted/twisted/security/advisories/GHSA-rv6r-3f5q-9rgx

https://github.com/twisted/twisted/releases/tag/twisted-22.2.0

https://github.com/twisted/twisted/commit/89c395ee794e85a9657b112c4351417850330ef9

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3