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Amazon Linux AMI: CVE-2022-21716: Security patch for python-twisted-conch (ALAS-2022-1592)

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Amazon Linux AMI: CVE-2022-21716: Security patch for python-twisted-conch (ALAS-2022-1592)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
03/03/2022
Created
06/14/2022
Added
06/10/2022
Modified
06/10/2022

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.

Solution(s)

  • amazon-linux-upgrade-python-twisted-conch

References

  • ALAS-2022-1592
  • CVE-2022-21716
  • USN-5354-1
  • USN-5354-2

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