USN-264-1: gnupg vulnerability

4 April 2006

gnupg vulnerability

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

  • Ubuntu 5.10
  • Ubuntu 5.04
  • Ubuntu 4.10

Software Description


Tavis Ormandy discovered a flaw in gnupg’s signature verification. In some cases, certain invalid signature formats could cause gpg to report a ‘good signature’ result for auxiliary unsigned data which was prepended or appended to the checked message part.

Update instructions

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

Ubuntu 5.10
Ubuntu 5.04
Ubuntu 4.10

To update your system, please follow these instructions: