About Ubuntu

=========================================================== Ubuntu Security Notice USN-252-1 February 17, 2006 gnupg vulnerability CVE-2006-0455 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 4.10 (Warty Warthog) Ubuntu 5.04 (Hoary Hedgehog) Ubuntu 5.10 (Breezy Badger) The following packages are affected: gnupg The problem can be corrected by upgrading the affected package to version 1.2.4-4ubuntu2.2 (for ubuntu 4.10), 1.2.5-3ubuntu5.2 (for Ubuntu 5.04), or 1.4.1-1ubuntu1.1 (for Ubuntu 5.10). In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Tavis Ormandy discovered a potential weakness in the signature verification of gnupg. gpgv and gpg --verify returned a successful exit code even if the checked file did not have any signature at all. The recommended way of checking the result is to evaluate the status messages, but some third party applications might just check the exit code for determining whether or not a signature is valid. These applications could be tricked into erroneously reporting a valid signature. Please note that this does not affect the Ubuntu package signature checks.