NSFOCUS Security Advisory (SA2006-05)
Microsoft Excel SELECTION Record Memory Corruption Vulnerability
Release Date: 2006-07-12
CVE ID: CVE-2006-1302
Affected systems & software
Microsoft Excel 2000
Microsoft Excel 2002
Microsoft Excel 2003
Unaffected systems & software
NSFocus Security Team discovered a memory corruption vulnerability in Microsoft
Excel's processing of SELECTION record, which allows remote attackers to run
arbitrary via carefully crafted Excel files.
Excel does not perform sufficient check for certain field when processing
SELECTION record. During some data copying operation the user-supplied data
might be used for the copying, resulting in memory corruption and arbitrary
Attackers can craft an Excel file with malformed SELECTION record and allure
users to open it via instant messaging tools, e-mail or other vectors, resulting
in arbitrary code execution with the privilege of the user. If the user is
the administrator, then attackers might take complete control over the system.
Do not open any Excel file from untrusted sources.
2006.03.30 Informed the vendor
2006.04.03 Vendor confirmed the vulnerability
2006.07.11 Microsoft has released a security bulletin (MS06-037) and related
For more details about the security bulletin, please refer to:
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-1302 to this issue. This is a candidate for inclusion in the
CVE list (http://cve.mitre.org), which standardizes names for security problems.
Candidates may change significantly before they become official CVE entries.
Wen Yujie of NSFocus Security Team found the vulnerability.
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NSFOCUS INFORMATION TECHNOLOGY CO.,LTD
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