Ubuntu 23.10 USN-6592-1 urgent: remote code execution risk in libssh

ubuntu

January 22, 2024

Several security issues were fixed in libssh.

Summary

Several security issues were fixed in libssh.

Software Description:

- libssh: A tiny C SSH library

Details:

It was discovered that libssh incorrectly handled the ProxyCommand and the

ProxyJump features. A remote attacker could possibly use this issue to

inject malicious code into the command of the features mentioned through

the hostname parameter. (CVE-2023-6004)

It was discovered that libssh incorrectly handled return codes when

performing message digest operations. A remote attacker could possibly use

this issue to cause libssh to crash, obtain sensitive information, or

execute arbitrary code. (CVE-2023-6918)

Topics Covered

security advisory software update remote code ubuntu code injection libssh

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
   libssh-4                        0.10.5-3ubuntu1.2

Ubuntu 23.04:
   libssh-4                        0.10.4-2ubuntu0.3

Ubuntu 22.04 LTS:
   libssh-4                        0.9.6-2ubuntu0.22.04.3

Ubuntu 20.04 LTS:
   libssh-4                        0.9.3-2ubuntu2.5

In general, a standard system update will make all the necessary changes.