Common Vulnerabilities and Exposures assigned an identifier CVE-2007-0104 to the following vulnerability: The Adobe PDF specification 1.3, as implemented by (a) xpdf 3.0.1 patch 2, (b) kpdf in KDE before 3.5.5, (c) poppler before 0.5.4, and other products, allows remote attackers to have an unknown impact, possibly including denial of service (infinite loop), arbitrary code execution, or memory corruption, via a PDF file with a (1) crafted catalog dictionary or (2) a crafted Pages attribute that references an invalid page tree node. References: http://www.securityfocus.com/archive/1/archive/1/457055/100/0/threaded http://www.kde.org/info/security/advisory-20070115-1.txt https://issues.rpath.com/browse/RPL-964 http://support.novell.com/techcenter/psdb/44d7cb9b669d58e0ce5aa5d7ab2c7c53.html http://docs.info.apple.com/article.html?artnum=305214 http://www.mandriva.com/security/advisories?name=MDKSA-2007:018 http://www.mandriva.com/security/advisories?name=MDKSA-2007:020 http://www.mandriva.com/security/advisories?name=MDKSA-2007:022 http://www.mandriva.com/security/advisories?name=MDKSA-2007:019 http://www.mandriva.com/security/advisories?name=MDKSA-2007:021 http://www.mandriva.com/security/advisories?name=MDKSA-2007:024 http://www.novell.com/linux/security/advisories/2007_3_sr.html http://www.ubuntu.com/usn/usn-410-1 http://www.ubuntu.com/usn/usn-410-2 http://www.us-cert.gov/cas/techalerts/TA07-072A.html http://www.securityfocus.com/bid/21910 http://projects.info-pull.com/moab/MOAB-06-01-2007.html http://www.frsirt.com/english/advisories/2007/0203 http://www.frsirt.com/english/advisories/2007/0212 http://www.frsirt.com/english/advisories/2007/0244 http://www.frsirt.com/english/advisories/2007/0930 http://securitytracker.com/id?1017514 http://www.securitytracker.com/id?1017749 http://secunia.com/advisories/23799 http://secunia.com/advisories/23791 http://secunia.com/advisories/23808 http://secunia.com/advisories/23813 http://secunia.com/advisories/23815 http://secunia.com/advisories/23844 http://secunia.com/advisories/23839 http://secunia.com/advisories/23876 http://secunia.com/advisories/24204 http://secunia.com/advisories/24479 http://xforce.iss.net/xforce/xfdb/31364
Based on our own research and information from Adobe we believe the description of this issue isn't totally accurate (this isn't a problem with the specification, but with specific implementations of the specification). Basically, some implementations of the PDF spec, including acrobat reader 7.0.8, erroneously allow page tree objects that refer back to themselves. As a result, an infinite loop could be created. As far as we could tell, the worst a malformed file could do is DOS the application. We do not consider a user-assisted DoS of a client application such as xpdf be a security issue.