Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : libssh regression (USN-3795-3)

High Nessus Plugin ID 119300

Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

USN-3795-1 and USN-3795-2 fixed a vulnerability in libssh. The upstream fix introduced a regression. This update fixes the problem.

Original advisory details :

Peter Winter-Smith discovered that libssh incorrectly handled authentication when being used as a server. A remote attacker could use this issue to bypass authentication without any credentials.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libssh-4 package.

See Also

https://usn.ubuntu.com/3795-3/

Plugin Details

Severity: High

ID: 119300

File Name: ubuntu_USN-3795-3.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2018/11/30

Modified: 2018/11/30

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libssh-4, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 2018/11/29

Reference Information

USN: 3795-3