Summary ======= IrfanView Formats PlugIn is prone to an overflow condition. The JLS Plugin (jpeg_ls.dll) library fails to properly sanitize user-supplied input resulting in a heap-based buffer overflow. With a specially crafted JLS compressed image file, a context-dependent attacker could potentially execute arbitrary code. CVE number: CVE-2012-3585 Impact: high Vendor Homepage: http://www.ifranview.com/ Vendor Notified: 16/06/2012 Found by: Joseph Sheridan of Reaction Information Security href="http://www.reactionpenetrationtesting.co.uk/joseph-sheridan.html This advisory is posted at: http://www.reactionpenetrationtesting.co.uk/Irfanview-JLS-Heap-Overflow.html POC file posted at: http://www.reactionpenetrationtesting.co.uk/vuln.jls Affected Products ================= Irfanview Plugins version 4.33 Details ======= IrfanView Formats PlugIn is prone to an overflow condition. The JLS Plugin (jpeg_ls.dll) library fails to properly sanitize user-supplied input resulting in a heap-based buffer overflow. With a specially crafted JLS compressed image file, a context-dependent attacker could potentially execute arbitrary code. Impact ====== If a user could be enticed to open a malicious JLS file, the attack could result in remote code execution. Solution =========== Upgrade to Irfanview Plugins version 4.34 The following jls dll has been patched: http://www.irfanview.net/plugins/jpeg_ls.zip Distribution ============ In addition to posting on the website, a text version of this notice is posted to the following e-mail and Usenet news recipients. * bugtraq () securityfocus com * full-disclosure () lists grok org uk * oss [dash] security [dash] subscribe [at] lists [dot] openwall [dot] com or Future updates of this advisory, if any, will be placed on the ReactionIS corporate website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the URL below for any updates: http://www.reactionpenetrationtesting.co.uk/Irfanview-JLS-Heap-Overflow.html ============================================================================== Reaction Information Security Lombard House Business Centre, Suite 117, 12-17 Upper Bridge Street, Canterbury, Kent, CT1 2NF Phone: +44 (0)1227 785050 Email: research () reactionis {dot} co {dot} uk Web: http://www.reactionpenetrationtesting.co.uk