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Microsoft Excel BIFF File Format Cell Record Parsing Memory Corruption
Vulnerability
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SUMMARY
A 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.
DETAILS
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:
<http://www.microsoft.com/technet/security/Bulletin/MS08-016.mspx>
http://www.microsoft.com/technet/security/Bulletin/MS08-016.mspx
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0113>
CVE-2008-0113
Disclosure Timeline:
2007-05-22 - Vulnerability reported to vendor
2008-03-11 - Coordinated public release of advisory
ADDITIONAL INFORMATION
The information has been provided by <mailto:zdi-disclosures@3com.com>
The Zero Day Initiative (ZDI).
The original article can be found at:
<http://www.zerodayinitiative.com/advisories/ZDI-08-008/>
http://www.zerodayinitiative.com/advisories/ZDI-08-008/
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