USN-3205-1: tcpdump vulnerabilities

21 February 2017

tcpdump vulnerabilities

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

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


tcpdump could be made to crash or run programs if it received specially crafted network traffic.

Software Description

  • tcpdump - command-line network traffic analyzer


It was discovered that tcpdump incorrectly handled certain packets. A remote attacker could use this issue to cause tcpdump to crash, resulting in a denial of service, or possibly execute arbitrary code.

In the default installation, attackers would be isolated by the tcpdump AppArmor profile.

Update instructions

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

Ubuntu 16.10
tcpdump - 4.9.0-1ubuntu1~ubuntu16.10.1
Ubuntu 16.04 LTS
tcpdump - 4.9.0-1ubuntu1~ubuntu16.04.1
Ubuntu 14.04 LTS
tcpdump - 4.9.0-1ubuntu1~ubuntu14.04.1
Ubuntu 12.04 LTS
tcpdump - 4.9.0-1ubuntu1~ubuntu12.04.1

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.