Several remote vulnerabilities have been discovered in Xulrunner, a runtime environment for XUL applications, such as the Iceweasel web browser. The Common Vulnerabilities and Exposures project identifies the following problems: Martijn Wargers, Arno Renevier, Jesse Ruderman, Olli Pettay and Blake Kaplan disocvered several issues in the browser engine that could potentially lead to the execution of arbitrary code. (MFSA 2009-34) monarch2020 reported an integer overflow in a base64 decoding function. (MFSA 2009-34) Christophe Charron reported a possibly exploitable crash occuring when multiple RDF files were loaded in a XUL tree element. (MFSA 2009-34) Yongqian Li reported that an unsafe memory condition could be created by specially crafted document. (MFSA 2009-34) Peter Van der Beken, Mike Shaver, Jesse Ruderman, and Carsten Book discovered several issues in the JavaScript engine that could possibly lead to the execution of arbitrary JavaScript. (MFSA 2009-34) Attila Suszter discovered an issue related to a specially crafted Flash object, which could be used to run arbitrary code. (MFSA 2009-35) PenPal discovered that it is possible to execute arbitrary code via a specially crafted SVG element. (MFSA 2009-37) Blake Kaplan discovered a flaw in the JavaScript engine that might allow an attacker to execute arbitrary JavaScript with chrome privileges. (MFSA 2009-39) moz_bug_r_a4 discovered an issue in the JavaScript engine that could be used to perform cross-site scripting attacks. (MFSA 2009-40)