[USN-5354-2] Twisted vulnerability


========================================================================== Ubuntu Security Notice USN-5354-2 May 05, 2022
twisted vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 22.04 LTS – Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
Summary:
Twisted could be made to crash if it received specially crafted network traffic.
Software Description: – twisted: Event-based framework for internet applications
Details:
USN-5354-1 fixed vulnerabilities in Twisted. This update provides the corresponding updates for Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 22.04 LTS.
Original advisory details:  It was discovered that Twisted incorrectly processed SSH handshake data on  connection establishments. A remote attacker could use this issue to cause  Twisted to crash, resulting in a denial of service. (CVE-2022-21716)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04 LTS: python3-twisted 22.1.0-2ubuntu2.1
Ubuntu 16.04 ESM: python-twisted 16.0.0-1ubuntu0.4+esm1 python-twisted-bin 16.0.0-1ubuntu0.4+esm1 python-twisted-web 16.0.0-1ubuntu0.4+esm1 python3-twisted 16.0.0-1ubuntu0.4+esm1
Ubuntu 14.04 ESM: python-twisted 13.2.0-1ubuntu1.2+esm2 python-twisted-bin 13.2.0-1ubuntu1.2+esm2 python-twisted-web 13.2.0-1ubuntu1.2+esm2
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5354-2 ubuntu.com/security/notices/USN-5354-1 CVE-2022-21716
Package Information: launchpad.net/ubuntu/+source/twisted/22.1.0-2ubuntu2.1