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Ubuntu 24.04 LTS USN-7108-1 Critical: AsyncSSH SSH Protocol Issues

Several issues were fixed in AsyncSSH.. ========================================================================== Ubuntu Security Notice USN-7108-1 November 18, 2024 python-asyncssh vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several issues were fixed in AsyncSSH. Software Description: - python-asyncssh: asyncio-based client and server implementation of SSHv2 protocol 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 24.04 LTS python3-asyncssh 2.10.1-2ubuntu0.1+esm1 Available with Ubuntu Pro Ubuntu 22.04 LTS python3-asyncssh 2.5.0-1ubuntu0.1 Ubuntu 20.04 LTS python3-asyncssh 1.12.2-1ubuntu0.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-7108-1 CVE-2023-46445, CVE-2023-46446 Package Information: https://launchpad.net/ubuntu/+source/python-asyncssh/1.12.2-1ubuntu0.2 . Update on python-asyncssh vulnerabilities resolving security concerns for various Ubuntuversions with prompt fixes.. python-asyncssh, Ubuntu security, AsyncSSH update, security issues, algorithm downgrade. . Severity: Critical. LinuxSecurity.com Team

Nov 18, 2024 •Critical Ubuntu