CVE-2024-5734 in Online Discussion Forum
Summary
by MITRE • 06/07/2024
A vulnerability classified as critical has been found in itsourcecode Online Discussion Forum 1.0. Affected is an unknown function of the file /members/poster.php. The manipulation of the argument image leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-267408.
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Analysis
by VulDB Data Team • 06/08/2024
This critical vulnerability exists within the itsourcecode Online Discussion Forum version 1.0, specifically targeting the image argument handling within the /members/poster.php file. The flaw represents a classic unrestricted file upload vulnerability that allows attackers to bypass security controls and execute malicious code on the target system. The vulnerability has been publicly disclosed and is actively being exploited, making it particularly dangerous for organizations that have not yet patched their installations. The issue stems from inadequate input validation and sanitization mechanisms that fail to properly verify the file type and content before processing user-uploaded images.
The technical implementation of this vulnerability allows remote attackers to upload arbitrary files to the server through the image parameter in the poster.php script. This type of vulnerability falls under CWE-434 which specifically addresses unrestricted file upload flaws where applications accept files from users without proper validation. The attack vector is particularly concerning because it operates entirely over remote network connections, eliminating the need for local system access or physical presence. Attackers can leverage this vulnerability to upload web shells, malicious scripts, or other harmful payloads that can compromise the entire server infrastructure.
The operational impact of this vulnerability extends far beyond simple unauthorized file uploads. Once an attacker successfully exploits this flaw, they gain the ability to execute arbitrary code on the affected server, potentially leading to complete system compromise. This vulnerability enables attackers to establish persistent backdoors, escalate privileges, access sensitive data, and use the compromised system as a launch point for further attacks against internal networks. The implications for organizations using this forum software are severe, as the vulnerability could result in data breaches, service disruption, and regulatory compliance violations. The public availability of exploitation methods means that even organizations without advanced threat intelligence capabilities can potentially exploit this vulnerability.
Mitigation strategies should focus on immediate patching of the affected software version and implementation of comprehensive file upload validation controls. Organizations must ensure that all file uploads are subject to strict type checking, size limitations, and content verification processes. The recommended approach includes implementing whitelisting of allowed file extensions, performing MIME type validation, and storing uploaded files outside the web root directory. Additionally, organizations should consider implementing web application firewalls to detect and block suspicious upload attempts. This vulnerability aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to initial access through web application attacks and privilege escalation through code execution. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components of the system architecture.