CVE-2006-6611 in Barman
Summary
by MITRE
PHP remote file inclusion vulnerability in interface.php in Barman 0.0.1r3 allows remote attackers to execute arbitrary PHP code via a URL in the basepath parameter.
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Analysis
by VulDB Data Team • 08/11/2024
The vulnerability identified as CVE-2006-6611 represents a critical remote file inclusion flaw in the Barman web application version 0.0.1r3. This vulnerability specifically affects the interface.php file which processes user input through the basepath parameter without adequate validation or sanitization. The flaw enables malicious actors to inject and execute arbitrary PHP code on the target system by manipulating the basepath parameter with a malicious URL. This type of vulnerability falls under the category of insecure direct object references and remote code execution threats that have been consistently documented in cybersecurity frameworks and threat models.
The technical implementation of this vulnerability stems from the application's failure to properly validate user-supplied input before using it in file inclusion operations. When the basepath parameter is passed to interface.php, the application directly incorporates this value into file inclusion directives without performing sufficient input validation or sanitization checks. This creates an opportunity for attackers to inject malicious URLs that point to remote servers hosting malicious PHP scripts. The vulnerability is particularly dangerous because it allows remote code execution, which can lead to complete system compromise and unauthorized access to sensitive data. This flaw aligns with CWE-98 and CWE-88 categories that specifically address insecure file inclusion practices and command injection vulnerabilities.
The operational impact of this vulnerability extends beyond simple code execution to encompass potential data breaches, system compromise, and unauthorized access to sensitive information. Attackers can leverage this vulnerability to establish persistent access to the affected system, deploy additional malware, or exfiltrate confidential data. The remote nature of this vulnerability means that attackers do not require physical access to the system or local network privileges to exploit it. This makes the vulnerability particularly attractive to threat actors and aligns with attack patterns documented in the MITRE ATT&CK framework under the T1190 and T1059 techniques for exploiting remote services and executing code. Organizations running vulnerable versions of Barman face significant risk of unauthorized system access and potential data loss.
Mitigation strategies for this vulnerability should focus on immediate patching and input validation implementation. The most effective solution involves applying the vendor-supplied security patches or upgrading to a patched version of Barman that addresses this specific vulnerability. In the interim, administrators should implement input validation measures that reject any non-numeric or non-expected input values for the basepath parameter. Network-level protections such as web application firewalls can also help detect and block malicious requests attempting to exploit this vulnerability. Additionally, implementing proper access controls and limiting the functionality of the affected application can reduce the potential impact of exploitation. Security monitoring should include detection of unusual file inclusion patterns and attempts to access external resources through the vulnerable parameter. The vulnerability demonstrates the critical importance of input validation and the principle of least privilege in web application security, as outlined in industry standards and best practices for secure coding practices.