Unchecked Buffer in Content Management Server New

Three security vulnerabilities have been discovered in Microsoft Content Management Server the most serious of which could enable an attacker to gain full control over the server.

Issue

Microsoft Content Management Server (MCMS) 2001 is a .Net Enterprise Server product that simplifies developing and managing e-business web sites. Microsoft has learned of three security vulnerabilities affecting it:

• A buffer overrun in a low-level function that performs user authentication. At least one web page included with MCMS 2001 passes inputs directly to the function, thereby potentially providing a way for an attacker to overrun the buffer. The result of exploiting the vulnerability would be to either cause MCMS to fail, or run code in the context of the MCMS service (which runs as Local System).
• A vulnerability resulting from the confluence of two flaws affecting a function that allows files to be uploaded to the server. The first flaw lies in how the function authenticates requests, and would allow any user to submit an upload request. The second results because it is possible to override the upload location; where the function should upload files to a folder that only privileged users can access, it can be overridden to upload it to a temporary folder that does allow unprivileged users to call it. By exploiting the two flaws in tandem, an attacker could upload an .ASP or other file to the server, in a location from which it could be executed.
• A SQL injection vulnerability affecting a function that services requests for image files and other resources. Exploiting the vulnerability could enable an attacker to run SQL commands on the server, which would not only allow data in the MCMS database to be added, changed or deleted, but also would enable the attacker to run operating system commands on the server.

Affected Products

• Microsoft Content Management Server 2001

Download

Software patches are available from the following locations:

• Microsoft Content Management Server 2001

Further Details

Source: Microsoft Corporation

Reference: Microsoft Corporation

Updated: August 7, 2002

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