What’s Vulnerable › Vulnerabilities

CVE-2022-21716: Buffer Overflow in Twisted

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.

Affected products

How to fix

Upgrade to a fixed version: twisted 22.2.0. Check the vendor advisory for mitigations.

References

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