USN-3795-3: libssh regression
libssh regression
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
USN-3795-1 and USN-3795-2 introduced a regression in libssh.
Software Description
- libssh – A tiny C SSH library
Details
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.
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 18.10
- libssh-4 – 0.8.1-1ubuntu0.3
- Ubuntu 18.04 LTS
- libssh-4 – 0.8.0~20170825.94fa1e38-1ubuntu0.2
- Ubuntu 16.04 LTS
- libssh-4 – 0.6.3-4.3ubuntu0.2
- Ubuntu 14.04 LTS
- libssh-4 – 0.6.1-0ubuntu3.5
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
Source: USN-3795-3: libssh regression
