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Date: Wed, 13 Apr 2011 10:29:13 +0200 From: "VUPEN Security Research" <advisories@...en.com> To: <bugtraq@...urityfocus.com> Subject: VUPEN Security Research - Microsoft Office MSO Size Handling Integer Overflow Vulnerability VUPEN Security Research - Microsoft Office MSO Size Handling Integer Overflow Vulnerability http://www.vupen.com/english/research.php I. BACKGROUND --------------------- "Microsoft Office is a proprietary commercial office suite of inter-related desktop applications, servers and services for the Microsoft Windows and Mac OS X" (Wikipedia) II. DESCRIPTION --------------------- VUPEN Vulnerability Research Team discovered a critical vulnerability in Microsoft Office. The vulnerability is caused by an integer overflow error in the MSO component when parsing certain values within an Office document, which could be exploited by attackers to compromise a vulnerable system by tricking a user into opening a malformed Office file (e.g. Word). CVSS Score: 10 (AV:N/AC:L/Au:N/C:C/I:C/A:C) / CVE-2011-0041 III. AFFECTED PRODUCTS --------------------------- Microsoft Office XP Service Pack 3 IV. Binary Analysis & Exploits/PoCs --------------------------------------- In-depth binary analysis of the vulnerability and a proof-of-concept code are available through the VUPEN Binary Analysis & Exploits Service : http://www.vupen.com/english/services/ba-index.php V. VUPEN Threat Protection Program ----------------------------------- To proactively protect critical networks and infrastructures against unpatched vulnerabilities and reduce risks related to zero-day attacks, VUPEN shares its vulnerability research with governments and organizations members of the VUPEN Threat Protection Program (TPP). VUPEN TPP customers receive fully detailed and technical reports about security vulnerabilities discovered by VUPEN and in advance of their public disclosure. http://www.vupen.com/english/services/tpp-index.php VI. SOLUTION ---------------- Apply the MS11-029 security update. VII. CREDIT -------------- This vulnerability was discovered by Nicolas Joly and Chaouki Bekrar of VUPEN Security VIII. ABOUT VUPEN Security --------------------------- VUPEN is a leading IT security research company providing vulnerability management and security intelligence solutions which enable enterprises and institutions to eliminate vulnerabilities before they can be exploited, ensure security policy compliance and meaningfully measure and manage risks. Governmental and federal agencies, and global enterprises in the financial services, insurance, manufacturing and technology industries rely on VUPEN to improve their security, prioritize resources, cut time and costs, and stay ahead of the latest threats. * VUPEN Vulnerability Notification Service (VNS) : http://www.vupen.com/english/services/vns-index.php * VUPEN Binary Analysis & Exploits Service (BAE) : http://www.vupen.com/english/services/ba-index.php * VUPEN Threat Protection Program for Govs (TPP) : http://www.vupen.com/english/services/tpp-index.php * VUPEN Web Application Security Scanner (WASS) : http://www.vupen.com/english/services/wass-index.php IX. REFERENCES ---------------------- http://www.vupen.com/english/research-vuln.php http://www.vupen.com/english/advisories/2011/0947 http://www.microsoft.com/technet/security/Bulletin/MS11-029.mspx X. DISCLOSURE TIMELINE ----------------------------- 2010-05-05 - Vulnerability Discovered by VUPEN 2011-04-12 - MS11-029 security update released
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