Please Install the Updated Packages.
Xpdf is an X Window System-based viewer for Portable Document Format (PDF) files. Kees Cook discovered a flaw in the way xpdf displayed malformed fonts embedded in PDF files. An attacker could create a malicious PDF file that would cause xpdf to crash, or, potentially, execute arbitrary code when opened. (CVE-2008-1693) Users are advised to upgrade to these updated packages, which contain backported patches to resolve this issue.
xpdf on CentOS 4
Updated on 2015-03-25