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Ubuntu 7108-2: AsyncSSH Security Advisory Updates

ubuntu
Calendar Grey December 12, 2024
Dist Ubuntu Esm H88
Fixes for critical AsyncSSH vulnerabilities found in Ubuntu 18.04 LTS ensure system authentication is secure.
Several issues were fixed in AsyncSSH.

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)

Topics%20covered

Topics Covered

No topics assigned

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7108-2

Topics%20covered

Topics Covered

No topics assigned

Package Information

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