Advisory Details

August 22nd, 2012

Microsoft Excel Series Record Parsing Type Mismatch Remote Code Execution Vulnerability

ZDI-12-157
ZDI-CAN-1374

CVE ID CVE-2012-1847
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['12480']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Excel. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of Series records. The code within Excel.exe makes an assumption about the data types within a Series record and can be made to write beyond the bounds of a heap buffer when a specific combination of fields are set to unexpected values. This corruption can be leveraged to achieve code execution under the context of the user running the application.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/en-us/security/bulletin/MS12-030
DISCLOSURE TIMELINE
  • 2012-01-24 - Vulnerability reported to vendor
  • 2012-08-22 - Coordinated public release of advisory
CREDIT Anonymous
BACK TO ADVISORIES