__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN CSS Cursor Image Buffer Overflow (Windows Only) [Mozilla Foundation Security Advisory 2006-69] December 20, 2006 18:00 GMT Number R-084 [REVISED 5 Mar 2007] ______________________________________________________________________________ PROBLEM: There is a vulnerability when using the CSS cursor property to sest the cursor to certain images on Windows. PLATFORM: Firefox 2 and Firefox 1.5 but not the earlier Firefox 1.0 or Mozilla Suite Firefox prior to version 1.5.0.9 running on HP-UX B.11.11 and B.11.23 DAMAGE: Can result in a heap buffer overflow which could be used to compromise the victim's computer. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A miscalculated size during conversion of ASSESSMENT: the image to a Windows bitmap can result in a heap buffer overflow which could be used to compromise the victim's computer. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-084.shtml ORIGINAL BULLETIN: Mozilla Foundation Security Advisory 2006-69 http://www.mozilla.org/security/announce/2006/mfsa2006-69.html ADDITIONAL LINKS: Red Hat RHSA-2006:0760-2 http://rhn.redhat.com/errate/RHSA-2006-0760.html Red Hat RHSA-2006:0759-5 http://rhn.redhat.com/errate/RHSA-2006-0759.html Red Hat RHSA-2006:0758-2 http://rhn.redhat.com/errate/RHSA-2006-0758.html Visit Hewlett-Packard's Subscription Service for: HPSBUX02153 SSRT061181 rev. 3 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2006-6500 ______________________________________________________________________________ REVISION HISTORY: 03/05/2007 - revised R-084 to add a link to Hewlett-Packard HPSBUX02153 SSRT061181 rev. 3 for Firefox prior to version 1.5.0.9 running on HP-UX B.11.11 and B.11.23. [***** Start Mozilla Foundation Security Advisory 2006-69 *****] Mozilla Foundation Security Advisory 2006-69 Title: CSS cursor image buffer overflow (Windows only) Impact: Critical Announced: December 19, 2006 Reporter: Frederik Reiss Products: Firefox, Thunderbird, SeaMonkey Fixed in: Firefox 2.0.0.1 Firefox 1.5.0.9 Thunderbird 1.5.0.9 SeaMonkey 1.0.7 Description Frederik Reiss reported a crash when using the CSS cursor property to set the cursor to certain images on Windows. A miscalculated size during conversion of the image to a Windows bitmap can result in a heap buffer overflow which could be used to compromise the victim's computer. This flaw affects both Firefox 2 and Firefox 1.5 but not the earlier Firefox 1.0 or Mozilla Suite Workaround Upgrade to a fixed version. References https://bugzilla.mozilla.org/show_bug.cgi?id=353553 CVE-2006-6500 -------------------------------------------------------------------------------- [***** End Mozilla Foundation Security Advisory 2006-69 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Mozilla for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. 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