USN-6592-2: libssh vulnerabilities
5 February 2024
Several security issues were fixed in libssh.
Releases
Packages
- libssh - A tiny C SSH library
Details
USN-6592-1 fixed vulnerabilities in libssh. This update provides the
corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory 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)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04
-
libssh-4
-
0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3
Available with Ubuntu Pro
-
libssh-gcrypt-4
-
0.8.0~20170825.94fa1e38-1ubuntu0.7+esm3
Available with Ubuntu Pro
Ubuntu 16.04
-
libssh-4
-
0.6.3-4.3ubuntu0.6+esm1
Available with Ubuntu Pro
-
libssh-gcrypt-4
-
0.6.3-4.3ubuntu0.6+esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-6592-1: libssh-dev, libssh-gcrypt-dev, libssh-doc, libssh, libssh-gcrypt-4, libssh-4