Title: SquirrelMail Remote Command Execution Vulnerability
Severity: CRITICAL
Description:
SquirrelMail is a freely available webmail package written in PHP.
An input validation error exists in SquirrelMail that could enable remote users to execute arbitrary commands on a host running the package.
The problem occurs when certain query values are submitted to some of the scripts included with the package. It is possible for a remote user to cause the scripts to fail to load files containing configuration values. This could enable a user to bypass the authentication mechanisms used in the package. Once the authentication is bypassed, it is possible to coerce the scripts into creating a preferences file for a non-existent user. Malicious PHP code injected into this file and will be executed when one of the scripts attempts to load the preferences file for the non-existent user.
As a result, it is possible for remote users to execute arbitrary commands on a host running SquirrelMail with the privileges of the web server.
Affected Products:
- SquirrelMail SquirrelMail 1.0.4
- SquirrelMail SquirrelMail 1.0.5
References:
- XMB: XMB Homepage
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