Referenced CVEs:

================================================== ========= Ubuntu Security Notice USN-496-2 August 07, 2007 poppler vulnerability CVE-2007-3387 ================================================== ========= A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libpoppler1 0.5.1-0ubuntu7.2 Ubuntu 6.10: libpoppler1 0.5.4-0ubuntu4.2 Ubuntu 7.04: libpoppler1 0.5.4-0ubuntu8.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: USN-496-1 fixed a vulnerability in koffice. This update provides the corresponding updates for poppler, the library used for PDF handling in Gnome. Original advisory details: Derek Noonburg discovered an integer overflow in the Xpdf function StreamPredictor::StreamPredictor(). By importing a specially crafted PDF file into KWord, this could be exploited to run arbitrary code with the user's privileges.