Title: Microsoft Windows AEDEBUG Registry Key Vulnerability
Severity: HIGH
Description:
The default permissions on some installations of Windows NT allow members of the 'Everyone' group to write to the contents of the value that control what debugger is executed in the event of a system crash.
The registry value in question is:
\HKLM\Software\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger
Also, there is a value that controls whether any prompt is issued to the user before the selected debugger is executed:
\HKLM\Software\Microsoft\Windows NT\CurrentVersion\AeDebug\auto
Therefore, an attacker could specify code to run in the event of a process crash. Note that the code must already be on the target machine.
Affected Products:
- Microsoft Windows NT 4.0
- Microsoft Windows NT 4.0 alpha
- Microsoft Windows NT Enterprise Server 4.0
- Microsoft Windows NT Server 4.0
- Microsoft Windows NT Terminal Server 4.0
- Microsoft Windows NT Workstation 4.0
References:
- Microsoft: Microsoft Security Bulletin MS00-008: Frequently Asked Questions
- Microsoft: Q103861: Choosing the Debugger That the System Will Spawn
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