CVE-2004-2139 in YaBB
Summary
by MITRE
Unknown vulnerability in Adminedit.pl YaBB 1 Gold before 1.3.2 allows attackers to execute arbitrary code via settings.pl.
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Analysis
by VulDB Data Team • 06/05/2019
The vulnerability identified as CVE-2004-2139 represents a critical security flaw in the YaBB 1 Gold bulletin board system that existed prior to version 1.3.2. This issue manifests as a code execution vulnerability that stems from improper input validation and handling within the administrative interface components. The vulnerability specifically affects the adminedit.pl script which interacts with settings.pl, creating a potential attack vector for malicious actors seeking to compromise systems running vulnerable versions of this legacy forum software. The flaw demonstrates a classic path traversal and code injection weakness that has been documented in similar web application security contexts throughout the industry.
The technical exploitation of this vulnerability occurs through the manipulation of parameters within the settings.pl file that are processed by the adminedit.pl script. When administrators or authenticated users interact with the administrative interface, the application fails to properly sanitize input data before processing it within the context of the settings.pl configuration file. This lack of proper input validation creates an environment where attacker-controlled data can be interpreted and executed as code by the web server, effectively allowing remote code execution capabilities. The vulnerability aligns with CWE-94, which describes the weakness of allowing code to be executed as a result of untrusted input, and represents a form of insecure direct object reference that can be exploited through improper parameter handling.
The operational impact of this vulnerability extends beyond simple unauthorized access, as successful exploitation can lead to complete system compromise. Attackers can leverage this vulnerability to execute arbitrary commands on the affected server, potentially gaining full administrative privileges, exfiltrating sensitive data, or establishing persistent backdoors. The affected YaBB 1 Gold system becomes vulnerable to various attack patterns that fall under the MITRE ATT&CK framework's execution and privilege escalation domains, where adversaries can use the compromised system as a foothold for further network infiltration. Organizations running vulnerable versions of this software face significant risks including data breaches, service disruption, and potential regulatory compliance violations.
Mitigation strategies for CVE-2004-2139 primarily focus on immediate remediation through software updates and patches provided by the vendor. The most effective solution involves upgrading to YaBB 1.3.2 or later versions where the vulnerability has been addressed through proper input validation and sanitization measures. System administrators should implement additional security controls including web application firewalls that can detect and block suspicious parameter manipulation attempts, network segmentation to limit access to administrative interfaces, and regular security audits to identify other potential vulnerabilities in legacy systems. The vulnerability also underscores the importance of maintaining current security practices and regularly updating legacy software components that may contain known vulnerabilities, as highlighted in industry standards such as NIST's cybersecurity framework and ISO 27001 requirements for information security management.