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Microsoft Office Malformed String Parsing Vulnerability

oval:org.mitre.oval:def:639

MSO.DLL in Microsoft Office 2000 Office XP (2002) and Office 2003 allows user-assisted attackers to cause a denial of service and execute arbitrary code via multiple attack vectors as originally demonstrated using a crafted document record with a malformed string as demonstrated by replacing a certain "01 00 00 00" byte sequence with an "FF FF FF FF" byte sequence possibly causing an invalid array index in (1) an Excel .xls document which triggers an access violation in ole32.dll; (2) an Excel .xlw document which triggers an access violation in excel.exe; (3) a Word document which triggers an access violation in mso.dll in winword.exe; and (4) a PowerPoint document which triggers an access violation in powerpnt.txt. NOTE: after the initial disclosure this issue was demonstrated by triggering an integer overflow using an inconsistent size for a Unicode "Sheet Name" string.

Family:
windows
Status:
ACCEPTED
Platform(s):
  • Microsoft Windows XP
  • Microsoft Windows 2000
  • Microsoft Windows Server 2003
Class:
vulnerability
Reference(s):
  • CVE-2006-1540
Product(s):
  • Microsoft Office