[Full-disclosure] ZDI-08-008: Microsoft Excel BIFF File Format Cell Record Parsing Memory Corruption Vulnerability
zdi-disclosures at 3com.com
zdi-disclosures at 3com.com
Tue Mar 11 21:16:48 GMT 2008
ZDI-08-008: Microsoft Excel BIFF File Format Cell Record Parsing Memory
March 11, 2008
-- CVE ID:
-- Affected Vendors:
-- Affected Products:
Microsoft Office Excel Viewer
-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 5338.
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-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Office. Exploitation requires that
the attacker coerce the target into opening a malicious .XLS file.
The specific flaw exists within the parsing of malformed cell comments.
When Excel encounters a malformed record it attempts to rebuild the
broken meta-data. A flaw in this rebuilding process allows the user to
specify critical data offsets eventually leading to code execution under
the logged in users credentials.
-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:
-- Disclosure Timeline:
2007-05-22 - Vulnerability reported to vendor
2008-03-11 - Coordinated public release of advisory
This vulnerability was discovered by:
* Arnaud Dovi - ad at heapoverflow.com
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