Vulnerability Overview
The issue exists due to improper handling of the modname parameter in Modules.php. By manipulating the parameter with directory traversal sequences, an attacker can include and execute arbitrary files from the server's filesystem.
Vulnerability Details
Exploiting the vulnerability involves crafting a malicious request to Modules.php with a modified modname parameter that includes directory traversal characters (../). This can lead to unauthorized access to sensitive files like /etc/passwd, providing attackers with valuable system information and potentially facilitating further attacks.
Possible Effects
Exploitation of this LFI vulnerability could result in:
- Disclosure of sensitive files and data stored on the server.
- Gaining insights into system configuration and installed software for further targeted attacks.
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References
- Update Immediately: Ensure OpenSIS is updated beyond version 8.0 to mitigate this vulnerability.
- Access Controls: Tighten access controls and permissions to limit file access through the web application.
- Regular Monitoring: Implement monitoring for unusual access patterns or exploitation attempts.
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