Title: Microsoft IIS 5.0 In-Process Table Privelege Elevation Vulnerability
Severity: MODERATE
Description:
For performance reasons, Microsoft Internet Information Server 5.0 supports the ability to run certain executables 'in-process' when requested remotely.
When executables run 'in-process', they run as part of the main IIS process. It is important to restrict which executables can run 'in-process', because as part of the main IIS process they execute in the Local System security context.
IIS 5.0 ships with a table of executables that will run 'in-process' when requested by remote web clients. While all of these binaries are shipped with IIS, they are listed in the table using relative paths. A user who can create files on an IIS server can place an executable on the webroot filesystem with a relative path and filename that matches an entry in the table. When the executable is requested, it's path and filename will cause it to be executed 'in-process'. The executable may provide administrative access for the attacker.
By default unprivileged users do not have the permission to upload content to an IIS server.
Affected Products:
- Avaya DefinityOne Media Servers
- Avaya IP600 Media Servers
- Avaya S3400 Message Application Server
- Avaya S8100 Media Servers
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Professional SP1
- Microsoft Windows 2000 Professional SP2
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
References:
- Microsoft: Microsoft Security Bulletin MS01-044
- Microsoft: Microsoft Technet Security
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