Microsoft Word Two Code Execution Vulnerabilities

Secunia ID	SA30143
CVE-ID	CVE-2008-1091, CVE-2008-1434
Release Date	13 May 2008
Last Change	14 May 2008
Solution Status	Vendor Patch
Software	Microsoft Office 2000 Microsoft Office 2003 Professional Edition Microsoft Office 2003 Small Business Edition Microsoft Office 2003 Standard Edition Microsoft Office 2003 Student and Teacher Edition Microsoft Office 2004 for Mac Microsoft Office 2007 Microsoft Office 2008 for Mac Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Microsoft Office Word 2007 Microsoft Office XP Microsoft Word 2000 Microsoft Word 2002 Microsoft Word 2003 Microsoft Word Viewer 2003
Where	From remote "From remote" describes other vulnerabilities where the attack vector doesn't require access to the system or a local network. This category covers services that are acceptable to expose to the Internet (e.g. HTTP, HTTPS, SMTP). It also covers client applications used on the Internet and certain vulnerabilities where it is reasonable to assume that a security conscious user can be tricked into performing certain actions.
Impact	System access This covers vulnerabilities where malicious people are able to gain system access and execute arbitrary code with the privileges of a local user.
Description	Two vulnerabilities have been reported in Microsoft Word, which can be exploited by malicious people to compromise a user's system. 1) An error when parsing objects in rich text format (.rtf) files can be exploited to cause a heap-based buffer overflow e.g. when a user opens a specially crafted .rtf file containing malformed strings with Word or previews a specially crafted e-mail containing malformed strings as rich text or HTML. 2) An error exists in the processing of cascading style sheets (CSS) values and can be exploited to corrupt memory when a specially crafted HTML file is opened using Word. Successful exploitation may allow execution of arbitrary code.
Solution	Apply updates. Microsoft Office 2000 SP3: http://www.microsoft.com/downloads/details.aspx?FamilyId=9215ff71-38c0-416a-b89a-fe3474160f41 Microsoft Office XP SP3: http://www.microsoft.com/downloads/details.aspx?FamilyId=b348a518-221e-4567-a797-999715a8b2ef Microsoft Office 2003 SP2/SP3: http://www.microsoft.com/downloads/details.aspx?FamilyId=bc33d144-f917-47b8-961f-744ca847e14c 2007 Microsoft Office System (optionally with SP1): http://www.microsoft.com/downloads/details.aspx?FamilyId=071ceaa2-12e3-4401-9331-2a54a93e2550 Microsoft Word Viewer 2003 (optionally with SP3): http://www.microsoft.com/downloads/details.aspx?FamilyId=bce7ea31-2bf0-4930-aff9-837bcc82a682 x?FamilyId=bce7ea31-2bf0-4930-aff9-837bcc82a682 Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats (optionally with SP1): http://www.microsoft.com/downloads/details.aspx?FamilyId=2d718f37-c5d1-4e15-a7e1-5a15fedef52f Microsoft Office 2004 for Mac: http://www.microsoft.com/downloads/details.aspx?FamilyId=99F54471-CCF9-4D94-A882-A05ECD128ADC Microsoft Office 2008 for Mac: http://www.microsoft.com/downloads/details.aspx?FamilyId=395D1487-A3A6-4106-A0F8-4D6E1D6D89D2
Reported by	1) wushi, team509 via Zero Day Initiative (ZDI). 2) Jun Mao, iDefense Labs.
Original Advisory	MS08-026: http://www.microsoft.com/technet/security/bulletin/ms08-026.mspx iDefense Labs: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=700 ZDI: http://www.zerodayinitiative.com/advisories/ZDI-08-023/