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A local file inclusion (LFI) vulnerability exists in openSIS version 7.4 and prior, specifically in the Bottom.php script. The vulnerability is due to improper sanitization of the 'modname' request parameter, which is directly used in a PHP include() call. This allows attackers to include arbitrary local files, potentially leading to the execution of arbitrary PHP code with webserver privileges. The vendor's attempted fix using mysqli_real_escape_string() was inadequate, and as of version 7.4, the issue remains unresolved.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/unix/webapp/opensis_chain_exec.rb) targeting openSIS versions 7.4 and below. The exploit leverages a chain of vulnerabilities (incorrect access control, local file inclusion, and SQL injection leading to unsafe eval usage) to achieve unauthenticated remote code execution. The module is written in Ruby and uses the Metasploit framework's HTTP client to interact with the target web application. The attack is performed in several steps: retrieving a session cookie, injecting a malicious SQL payload via /CpSessionSet.php/index.php, setting session variables via /ForExport.php/index.php, and finally executing arbitrary PHP code through /Bottom.php/index.php. The module supports arbitrary PHP payloads, making it weaponized and suitable for post-exploitation activities. The targeted CVEs are 2020-13381, 2020-13382, and 2020-13383. The exploit is operational and can be used to gain code execution as the webserver user on vulnerable openSIS installations.
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