A protocol flaw was fixed in AsyncSSH.. ========================================================================== Ubuntu Security Notice USN-7051-1 October 02, 2024 python-asyncssh vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: A protocol flaw was fixed in AsyncSSH. Software Description: - python-asyncssh: asyncio-based client and server implementation of SSHv2 protocol Details: 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. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS python3-asyncssh 2.10.1-2ubuntu0.1 Ubuntu 22.04 LTS python3-asyncssh 2.5.0-1ubuntu0.1~esm1 Available with Ubuntu Pro Ubuntu 20.04 LTS python3-asyncssh 1.12.2-1ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-7051-1 CVE-2023-48795 Package Information: . An issue related to a protocol vulnerability in python-asyncssh has been rectified in Ubuntu versions 24.04, 22.04, and 20.04 LTS. Discover details regarding the recent security modification.. protocol flaw, asyncssh, ubuntu, security update, SSH communications. . Severity: Medium. LinuxSecurity.com Team
AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python 3.4+ asyncio framework. It has been discovered that it is vulnerable to . ------------------------------------------------------------------------- Debian LTS Advisory DLA-3899-1
Support for the "strict kex" SSH extension has been backported to AsyncSSH (a Python implementation of the SSHv2 protocol) as hardening against the Terrapin attack. . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-5750-1
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