Title: Microsoft JET Text I-ISAM Vulnerability
Severity: HIGH
Description:
Microsoft's JET database engine includes functionality referred to as Text I-ISAM. This allows the JET driver to write to a text file for another application to read later. This was implemented to allow data sharing between JET applications and other applications that don't support Dynamic Data Exchange.
A vulnerability exists in Text I-ISAM functionality that can result in any text file being written to, including system files. To exploit this issue, a database query could be created that adds destructive commands to a startup file or script.
Affected Products:
- Microsoft Access 2000
- Microsoft Access 95 0.0.0
- Microsoft Access 97
- Microsoft Excel 95 0.0.0
- Microsoft Excel 97 0.0.0
- Microsoft JET 3.5.0
- Microsoft JET 3.51.0
- Microsoft JET 4.0.0
References:
- Microsoft: Frequently Asked Questions: Microsoft Security Bulletin (MS99-030)
- Microsoft: OFF: Patch Available That Eliminates Security Vulnerabilities in the Microsoft J
- Microsoft: Q141796: How to Identify the Jet Database Engine Components
- Microsoft: Q172733: Updated Version of Microsoft Jet 3.5 Available on MSL
- Microsoft: Q239105: ACC97: Text I-ISAM Allows Users to Append Lines Into System Files
- Microsoft: Q239114: ACC2000: Updated Version of Microsoft Jet 4.0 Available on MS
- Microsoft: Q239471: ACC2000: Text I-ISAM Allows Users to Append Lines Into System Files
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