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Ubuntu 22.04 LTS USN-5354-2 Critical: Twisted DoS Threat

ubuntu
Calendar Grey May 5, 2022
Dist Ubuntu Esm H88
A vulnerability in Twisted on Ubuntu might trigger a crash from specially designed traffic, causing a Denial of Service; critical patches for impacted versions are released now.
Twisted could be made to crash if it received specially crafted network traffic.

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)

Topics%20covered

Topics Covered

security advisory denial of service critical issue network traffic ubuntu twisted

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

https://ubuntu.com/security/notices/USN-5354-2

CVE-2022-21716

Severity
critical
Lowest
Low
Medium
High
Critical

May 05, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical issue network traffic ubuntu twisted

Package Information

https://launchpad.net/ubuntu/+source/twisted/22.1.0-2ubuntu2.1

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