Title: WEBgais Remote Command Execution Vulnerability
Severity: HIGH
Description:
WEBgais is a script that provides a web interface to the "gais" (Global Area Intelligent Search) search engine tool. All versions up to 1.0B2 are vulnerable. The vulnerable script is /cgi-bin/webgais: due to improper input checking it allows a remote attacker to execute commands at the privilege level of the web server. A specifically formatted query allows the vulnerable code to be executed; this query must include the parameters output=subject and domain=paragraph. These two parameters must be included, otherwise the vulnerable code is not executed. The problem lies in an improperly protected Perl "system" command that can be circumvented by encapsulating the malicious command in single quotes and using the unix shell command separation metacharacter ";". See exploit for an example.
Affected Products:
- WebGAIS Development Team WebGAIS 1.0.0
- WebGAIS Development Team WebGAIS 1.0.0B1
- WebGAIS Development Team WebGAIS 1.0.0B2
References:
- WebGAIS: WebGAIS
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