USN-4252-1: tcpdump vulnerabilities

27 January 2020

tcpdump vulnerabilities

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

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


Several security issues were fixed in tcpdump.

Software Description

  • tcpdump - command-line network traffic analyzer


Multiple security issues were discovered in tcpdump. A remote attacker could use these issues to cause tcpdump to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 18.04 LTS
tcpdump - 4.9.3-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
tcpdump - 4.9.3-0ubuntu0.16.04.1

To update your system, please follow these instructions:

This update uses a new upstream release, which includes additional bug fixes. In general, a standard system update will make all the necessary changes.