CVE-2007-2707 in Newsfeed
Summary
by MITRE
PHP remote file inclusion vulnerability in linksnet_linkslog_rss.php in Linksnet Newsfeed 1.0 allows remote attackers to execute arbitrary PHP code via a URL in the dirpath_linksnet_newsfeed parameter.
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Analysis
by VulDB Data Team • 09/15/2024
The vulnerability described in CVE-2007-2707 represents a critical remote file inclusion flaw in the Linksnet Newsfeed 1.0 software, specifically within the linksnet_linkslog_rss.php script. This vulnerability falls under the category of insecure direct object reference and remote code execution risks that have been consistently documented in cybersecurity frameworks. The flaw stems from the application's improper validation of user-supplied input parameters, particularly the dirpath_linksnet_newsfeed parameter that is used to construct file paths for RSS feed processing. The vulnerability is classified as a CWE-98 issue, which specifically addresses improper file inclusion vulnerabilities where attacker-controllable input is directly used in file system operations without adequate sanitization or validation.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it through the dirpath_linksnet_newsfeed parameter, which is then processed by the vulnerable PHP script. Since the application does not properly validate or sanitize this input before using it in file inclusion operations, an attacker can manipulate the script to include and execute arbitrary PHP code from remote servers. This type of vulnerability is particularly dangerous because it allows attackers to execute code with the privileges of the web server process, potentially leading to complete system compromise. The vulnerability demonstrates a classic lack of input validation and output encoding practices that are fundamental to secure coding standards and are commonly referenced in the OWASP Top Ten security risks.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a pathway to escalate privileges and potentially gain full control over the affected web server. The vulnerability can be exploited by remote attackers without requiring any authentication, making it particularly dangerous for publicly accessible web applications. Attackers can leverage this vulnerability to install backdoors, steal sensitive data, modify web content, or use the compromised server as a staging point for further attacks within the network. The attack surface is significant since the vulnerability affects the RSS feed functionality of the Linksnet Newsfeed application, which could be accessed by legitimate users or automated tools, making detection difficult and exploitation relatively straightforward.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues in the future. The most effective immediate fix involves implementing proper input validation and sanitization for all user-supplied parameters, particularly those used in file system operations. Developers should employ allowlists of acceptable values rather than denylists, and implement proper parameter validation that rejects any input containing potentially dangerous sequences such as remote URLs or directory traversal attempts. The vulnerability also highlights the importance of following secure coding practices that align with the OWASP Secure Coding Practices and the ATT&CK framework's mitigation strategies for command and control activities. Organizations should implement network-level protections such as web application firewalls and access control measures to limit the impact of such vulnerabilities, while also conducting regular security assessments to identify and remediate similar issues in other applications. The remediation process should include comprehensive code reviews, input validation testing, and the implementation of proper error handling that does not expose sensitive system information to attackers.