CVE-2006-3040 in Amr Talkbox
Summary
by MITRE
** DISPUTED ** PHP remote file inclusion vulnerability in talkbox.php in Amr Talkbox allows remote attackers to execute arbitrary PHP code via a URL in the direct parameter. NOTE: this issue has been disputed by CVE, since the $direct variable is set to a static value just before the include statement.
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Analysis
by VulDB Data Team • 08/07/2024
The vulnerability described in CVE-2006-3040 pertains to a potential remote file inclusion flaw within the Amr Talkbox application's talkbox.php script. This type of vulnerability represents a critical security concern that could enable malicious actors to execute arbitrary code on the affected system. The flaw specifically manifests when the direct parameter contains a URL that gets processed through an include statement, creating an opportunity for code injection attacks. According to the initial description, attackers could exploit this by crafting a malicious URL that would be included and executed on the target server, potentially leading to complete system compromise. The vulnerability falls under the category of insecure input handling and improper validation of user-supplied data, which are fundamental principles that should be addressed in secure software development practices.
The technical implementation of this vulnerability stems from the application's failure to properly sanitize or validate the direct parameter before using it in an include operation. When the $direct variable is processed, it should undergo strict validation to ensure that only legitimate local file paths are accepted. However, the flaw allows remote URLs to be passed through this parameter, which can then be executed by the PHP interpreter. This behavior aligns with CWE-98, which describes improper input validation leading to code inclusion vulnerabilities, and represents a classic example of how insufficient input sanitization can create attack vectors for remote code execution. The vulnerability's classification as a remote file inclusion issue indicates that attackers do not need local access to exploit the flaw, making it particularly dangerous as it can be leveraged from anywhere on the internet.
The operational impact of this vulnerability extends beyond simple code execution to potentially enable full system compromise and unauthorized access to sensitive data. An attacker who successfully exploits this vulnerability could gain control over the web server hosting the Amr Talkbox application, potentially leading to data breaches, service disruption, or further network infiltration. The remote nature of the attack means that defenders must consider the entire attack surface exposed by this vulnerability, including potential lateral movement opportunities and data exfiltration capabilities. This type of vulnerability directly impacts the confidentiality, integrity, and availability of the affected system, as outlined in the CIA triad, and could result in significant business disruption and regulatory compliance violations.
Despite the disputed nature of this CVE as noted in the description, the underlying security principle remains relevant for understanding how input validation failures can create dangerous attack surfaces. The disputed status suggests that the specific conditions required for exploitation may have been misunderstood or that the vulnerability was not properly classified in the original assessment. However, the fundamental issue of inadequate input validation in PHP applications remains a persistent concern that security practitioners must address through proper code review processes and security testing. Organizations should implement comprehensive input validation measures, including whitelisting acceptable inputs, implementing proper access controls, and using secure coding practices to prevent similar vulnerabilities from occurring in their own applications. The ATT&CK framework would categorize this as a code injection technique, specifically involving remote file inclusion, which is a well-documented method for achieving initial access and privilege escalation in web application environments.