========================================================================== Ubuntu Security Notice USN-7108-2 December 12, 2024
python-asyncssh vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS Summary: Several issues were fixed in AsyncSSH. Software Description:- python-asyncssh: asyncio-based client and server implementation of SSHv2 protocol
Details: USN-7108-1 fixed vulnerabilities in AysncSSH. This update provides the corresponding update for Ubuntu 18.04 LTS. Original advisory details: Fabian Bäumer, Marcus Brinkmann, and Jörg Schwenk discovered that AsyncSSH did not properly handle the extension info message. An attacker able to intercept communications could possibly use this issue to downgrade the algorithm used for client authentication. (CVE-2023-46445) Fabian Bäumer, Marcus Brinkmann, and Jörg Schwenk discovered that AsyncSSH did not properly handle the user authentication request message. An attacker could possibly use this issue to control the remote end of an SSH client session via packet injection/removal and shell emulation. (CVE-2023-46446) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS python3-asyncssh 1.11.1-1ubuntu0.1~esm2 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-7108-2 https://ubuntu.com/security/notices/USN-7108-1 CVE-2023-46445, CVE-2023-46446
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