USN-432-2: GnuPG2, GPGME vulnerability

13 March 2007

gnupg2, gpgme1.0 vulnerability

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Software Description


USN-432-1 fixed a vulnerability in GnuPG. This update provides the corresponding updates for GnuPG2 and the GPGME library.

Original advisory details:

Gerardo Richarte from Core Security Technologies discovered that when gnupg is used without –status-fd, there is no way to distinguish initial unsigned messages from a following signed message. An attacker could inject an unsigned message, which could fool the user into thinking the message was entirely signed by the original sender.

Update instructions

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

Ubuntu 6.10
gnupg2 - 1.9.21-0ubuntu5.3
libgpgme11 - 1.1.2-2ubuntu0.1
Ubuntu 6.06 LTS
libgpgme11 - 1.1.0-1ubuntu0.1

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.