USN-370-1: screen vulnerability

1 November 2006

screen vulnerability

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10
  • Ubuntu 5.04

Software Description


cstone and Rich Felker discovered a programming error in the UTF8 string handling code of “screen” leading to a denial of service. If a crafted string was displayed within a screen session, screen would crash or possibly execute arbitrary code.

Update instructions

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

Ubuntu 6.10
screen - 4.0.2-4.1ubuntu5.6.10
Ubuntu 6.06 LTS
screen - 4.0.2-4.1ubuntu5.6.06
Ubuntu 5.10
screen - 4.0.2-4.1ubuntu2.5.10
Ubuntu 5.04
screen - 4.0.2-4.1ubuntu2.5.04

To update your system, please follow these instructions:

After a standard system upgrade you need to restart any running screen sessions to effect the necessary changes.