CVE-2008-2297 in Rantx
Summary
by MITRE
The admin.php file in Rantx allows remote attackers to bypass authentication and gain privileges by setting the logininfo cookie to "<?php" or "?>", which is present in the password file and probably passes an insufficient comparison.
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Analysis
by VulDB Data Team • 10/23/2024
The vulnerability described in CVE-2008-2297 represents a critical authentication bypass flaw within the Rantx web application's administrative interface. This issue stems from a fundamental flaw in how the system processes authentication cookies, specifically the logininfo cookie parameter that is manipulated to circumvent security controls. The vulnerability exists in the admin.php file where the application fails to properly validate or sanitize user input before processing authentication requests, creating a pathway for unauthorized access to administrative functions.
The technical exploitation of this vulnerability relies on the manipulation of the logininfo cookie value to contain PHP tag sequences such as "<?php" or "?>". These sequences are typically found within the password file and are likely being processed through a comparison function that does not adequately validate the input. The flaw manifests when the application's authentication routine performs a comparison operation that is insufficiently secure, allowing the malicious cookie value to pass through validation checks. This type of vulnerability falls under the category of improper input validation and weak authentication mechanisms, which are commonly classified as CWE-284 for improper access control and CWE-20 for improper input validation.
From an operational perspective, this vulnerability presents a severe risk to the security posture of any system running the affected Rantx application. An attacker capable of setting arbitrary cookie values can bypass authentication entirely and gain full administrative privileges without requiring legitimate credentials. This allows for complete system compromise including but not limited to data exfiltration, system modification, user account manipulation, and potential lateral movement within the network. The vulnerability is particularly dangerous because it requires minimal technical skill to exploit and can be implemented through simple cookie manipulation techniques.
The security implications extend beyond immediate unauthorized access to include potential persistence mechanisms and long-term system compromise. Attackers can leverage this vulnerability to establish backdoors, modify system configurations, or deploy additional malicious software. This authentication bypass creates a persistent threat vector that remains active until the underlying code is patched or the system is properly secured. The vulnerability also demonstrates poor security design principles where input validation occurs at inappropriate layers within the application architecture, violating fundamental security practices outlined in the OWASP Top Ten and NIST cybersecurity frameworks.
Mitigation strategies should include immediate patching of the affected application to properly validate and sanitize all cookie input, particularly the logininfo parameter. Organizations should implement proper input sanitization routines that prevent PHP tag sequences from being processed as valid authentication parameters. Additionally, the application should enforce secure cookie handling practices including proper encoding, validation, and secure transmission mechanisms. Network segmentation and monitoring solutions should be deployed to detect suspicious cookie manipulation attempts, while regular security audits should verify that authentication mechanisms properly validate all inputs. The implementation of multi-factor authentication and additional access controls should also be considered to reduce the impact of potential authentication bypasses. This vulnerability highlights the importance of proper security testing and code review processes to identify and remediate authentication-related flaws before they can be exploited by malicious actors.