===================================================================== CERT-Renater Note d'Information No. 2009/VULN322 _____________________________________________________________________ DATE : 07/08/2009 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running XML libraries. ====================================================================== https://www.cert.fi/en/reports/2009/vulnerability2009085.html ______________________________________________________________________ CERT-FI Advisory on XML libraries Target - - servers and server applications - - workstations and end user applications - - network devices - - embedded systems - - mobile devices - - other Access Vector - - remote Impact - - potential code execution - - denial of service Remediation - - fix provided by vendor - - no fix availble Details Several vulnerabilities regarding the parsing of XML data have been found in XML library implementations. CERT-FI coordinated the remediation efforts of these vulnerabilities. The vulnerabilities are related to the parsing of XML elements with unexpected byte values and recursive parentheses, which cause the program to access memory out of bounds, or to loop indefinitely. The effects of the vulnerabilities include denial of service and potentially code execution. The vulnerabilities can be exploited by enticing a user to open a specially modified file, or by submitting it to a server that handles XML content. Vulnerability Coordination Information and Acknowledgements CERT-FI has coordinated the release of this vulnerability between the vulnerability researcher and the affected vendors. CERT-FI would like to thank Jukka Taimisto, Tero Rontti and Rauli Kaksonen from the CROSS project at Codenomicon Ltd for reporting the vulnerability to us, and the vendors for co-operation in the remediation efforts. Vendor Information * Python libexpat * Apache Xerces, all versions * Sun JDK and JRE 6 Update 14 and earlier * Sun JDK and JRE 5.0 Update 19 and earlier Vendor Statements Python We are working on a fix. Remediation Patch the vulnerable software components according to the guidance published by the vendor. Where available, refer to the 'Vendor Information' section of this advisory for platform specific remediation. References * http://sunsolve.sun.com/search/document.do?assetkey=1-66-263489-1 * http://svn.apache.org/viewvc?view=rev&revision=781488 * http://www.codenomicon.com/labs/xml/ * http://www.codenomicon.com/labs/cross/ * CVE-2009-1885 * CVE-2009-2625 Contact Information CERT-FI Vulnerability Coordination can be contacted as follows: Email: vulncoord@ficora.fi Please quote the advisory reference [FICORA #245608] in the subject line Telephone: +358 9 6966 510 Monday - Friday 08:00 - 16:15 (EET: UTC+2) Fax : +358 9 6966 515 Post: Vulnerability Coordination FICORA/CERT-FI P.O. Box 313 FI-00181 Helsinki FINLAND CERT-FI encourages those who wish to communicate via email to make use of our PGP key. The key is available at https://www.cert.fi/en/activities/contact/pgp-keys.html Revision History: 6 August 2009, 00:10 a.m.: Published ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================