CVE-2006-5147 in VAMP Webmail
Summary
by MITRE
PHP remote file inclusion vulnerability in wamp_dir/setup/yesno.phtml in VAMP Webmail 2.0beta1 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the no_url parameter.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2006-5147 represents a critical remote file inclusion flaw within the VAMP Webmail 2.0beta1 software suite, specifically affecting the wamp_dir/setup/yesno.phtml component. This vulnerability falls under the category of insecure direct object references and remote code execution, with direct implications for web application security. The flaw manifests when the application fails to properly validate or sanitize user-supplied input, particularly within the no_url parameter that is processed during the webmail setup process.
The technical implementation of this vulnerability stems from the application's improper handling of dynamic file inclusion mechanisms. When a remote attacker provides a malicious URL through the no_url parameter, the vulnerable application directly incorporates this input into file inclusion operations without adequate sanitization or validation. This behavior creates an environment where arbitrary PHP code can be executed on the target server, effectively allowing attackers to gain control over the web application's execution environment. The vulnerability is classified as a CWE-98 weakness, representing improper input validation in file inclusion contexts, which aligns with the broader category of CWE-20, weak input validation.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with complete control over the affected webmail system. An attacker could potentially deploy backdoors, exfiltrate sensitive user data, modify webmail configurations, or use the compromised system as a launching point for further attacks within the network. The attack vector is particularly concerning because it requires no authentication to exploit, making it a high-severity threat that can be leveraged by anyone with access to the vulnerable webmail interface. This vulnerability directly maps to ATT&CK technique T1190, leveraging vulnerabilities in web applications to gain initial access, and T1059, executing malicious code through web shells or other remote execution methods.
Mitigation strategies for CVE-2006-5147 must focus on immediate patching of the VAMP Webmail software to version 2.0beta2 or later, which contains the necessary fixes to prevent the insecure file inclusion behavior. Organizations should implement proper input validation and sanitization measures, ensuring that all user-supplied parameters undergo rigorous validation before being processed. Additionally, web application firewalls should be configured to monitor for suspicious URL patterns and parameter manipulation attempts. The implementation of secure coding practices including the use of allowlists for file inclusion operations and disabling dangerous PHP functions such as eval and include can significantly reduce the attack surface. Network segmentation and monitoring solutions should be deployed to detect anomalous behavior patterns that might indicate exploitation attempts. Organizations should also consider implementing principle of least privilege access controls and regular security assessments to identify similar vulnerabilities in other web applications within their infrastructure.