USN-3809-1: OpenSSH vulnerabilities

6 November 2018

openssh vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in OpenSSH.

Software Description

  • openssh - secure shell (SSH) for secure access to remote machines

Details

Robert Swiecki discovered that OpenSSH incorrectly handled certain messages. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10708)

It was discovered that OpenSSH incorrectly handled certain requests. An attacker could possibly use this issue to access sensitive information. (CVE-2018-15473)

Update instructions

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

Ubuntu 18.04 LTS
openssh-server - 1:7.6p1-4ubuntu0.1
Ubuntu 16.04 LTS
openssh-server - 1:7.2p2-4ubuntu2.6
Ubuntu 14.04 LTS
openssh-server - 1:6.6p1-2ubuntu2.11

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References