USN-4173-1: FreeTDS vulnerability

30 October 2019

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



  • freetds - libraries for connecting to MS SQL and Sybase SQL servers


Felix Wilhelm discovered that FreeTDS incorrectly handled certain types
after a protocol downgrade. A remote attacker could use this issue to cause
FreeTDS 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 19.10
Ubuntu 19.04
Ubuntu 18.04

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