CVE-2008-1958 in Tr Script News
Summary
by MITRE
Unrestricted file upload vulnerability in the ajout_cat mode in admin/main.php in Tr Script News 2.1 allows remote authenticated users to execute arbitrary code by uploading a file with a .php extension.
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Analysis
by VulDB Data Team • 10/21/2024
The CVE-2008-1958 vulnerability represents a critical unrestricted file upload flaw in Tr Script News 2.1's administrative interface, specifically within the ajout_cat mode of admin/main.php. This vulnerability arises from insufficient input validation and sanitization mechanisms that fail to properly restrict file type uploads, allowing authenticated attackers to bypass security controls and upload malicious files. The flaw exists in the administrative section of the web application where users with legitimate access credentials can manipulate the file upload functionality to introduce potentially harmful code into the system. The vulnerability is particularly dangerous because it affects a core administrative function that handles content management operations, making it a prime target for exploitation by threat actors seeking to gain persistent access to the system.
The technical exploitation of this vulnerability occurs through a straightforward yet devastating method where authenticated users can upload files with .php extensions directly to the web server's file system. This flaw directly maps to CWE-434, which describes the weakness of unrestricted upload of executable files, and represents a classic example of insecure file handling practices in web applications. The vulnerability enables remote code execution because the uploaded php files can be executed by the web server, allowing attackers to run arbitrary commands on the target system. The unrestricted nature of the upload means that the application does not validate file contents, extensions, or MIME types, creating a pathway for attackers to deploy web shells, backdoors, or other malicious payloads that can be executed within the context of the web server's privileges.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides attackers with a persistent foothold within the target environment. Once successfully exploited, attackers can establish backdoor access, escalate privileges, and potentially move laterally within the network infrastructure. The vulnerability affects not just the immediate web application but also impacts the broader security posture of the organization, as the compromised system can serve as a launching point for further attacks against other internal systems. According to ATT&CK framework, this vulnerability aligns with T1190 (Exploit Public-Facing Application) and T1059 (Command and Scripting Interpreter), as it enables attackers to exploit a public-facing web application and execute code through the command interpreter. The authenticated nature of the vulnerability means that attackers must first obtain legitimate credentials, but once obtained, they can leverage this weakness to achieve persistent access without requiring additional compromise techniques.
Mitigation strategies for CVE-2008-1958 should focus on implementing robust file upload validation mechanisms and restricting file types that can be uploaded to administrative interfaces. Organizations should deploy proper input validation that checks file extensions, content types, and file signatures rather than relying solely on extension-based restrictions. The implementation of secure file upload practices, including storing uploaded files outside the web root directory and using random file names, significantly reduces the risk of exploitation. Additionally, access controls should be strictly enforced to limit administrative privileges to only necessary personnel, and regular security audits should be conducted to identify and remediate similar vulnerabilities in other applications. The vulnerability also highlights the importance of keeping web applications updated with the latest security patches, as Tr Script News 2.1 appears to be an older version that likely lacks modern security features and protections against such exploitation techniques.