=========================================================================Ubuntu Security Notice USN-4173-1
October 30, 2019

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

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS

Summary:

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

Software Description:
- freetds: libraries for connecting to MS SQL and Sybase SQL servers

Details:

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:
  freetds-bin                     1.1.6-1ubuntu0.1
  libct4                          1.1.6-1ubuntu0.1
  libsybdb5                       1.1.6-1ubuntu0.1
  tdsodbc                         1.1.6-1ubuntu0.1

Ubuntu 19.04:
  freetds-bin                     1.00.104-1ubuntu0.1
  libct4                          1.00.104-1ubuntu0.1
  libsybdb5                       1.00.104-1ubuntu0.1
  tdsodbc                         1.00.104-1ubuntu0.1

Ubuntu 18.04 LTS:
  freetds-bin                     1.00.82-2ubuntu0.1
  libct4                          1.00.82-2ubuntu0.1
  libsybdb5                       1.00.82-2ubuntu0.1
  tdsodbc                         1.00.82-2ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-4173-1
  CVE-2019-13508

Package Information:
  https://launchpad.net/ubuntu/+source/freetds/1.1.6-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/freetds/1.00.104-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/freetds/1.00.82-2ubuntu0.1