Advisory Published

USN-6598-1: Paramiko vulnerability

First published: Thu Jan 25 2024(Updated: )

Fabian Bäumer, Marcus Brinkmann, Jörg Schwenk discovered that the SSH protocol was vulnerable to a prefix truncation attack. If a remote attacker was able to intercept SSH communications, extension negotiation messages could be truncated, possibly leading to certain algorithms and features being downgraded. This issue is known as the Terrapin attack. This update adds protocol extensions to mitigate this issue.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/python3-paramiko<2.12.0-2ubuntu1.23.10.2
2.12.0-2ubuntu1.23.10.2
Ubuntu Ubuntu=23.10
All of
ubuntu/python3-paramiko<2.9.3-0ubuntu1.2
2.9.3-0ubuntu1.2
Ubuntu Ubuntu=22.04
All of
ubuntu/python3-paramiko<2.6.0-2ubuntu0.3
2.6.0-2ubuntu0.3
Ubuntu Ubuntu=20.04

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