CVE-2008-5497 in BandSite
Summary
by MITRE
BandSite CMS 1.1.4 allows remote attackers to bypass authentication and gain administrative access by setting the login_auth cookie to true.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 11/11/2024
The vulnerability identified as CVE-2008-5497 affects BandSite CMS version 1.1.4 and represents a critical authentication bypass flaw that enables remote attackers to escalate privileges and obtain administrative control over the affected system. This issue stems from improper validation of authentication state within the application's cookie-based session management mechanism. The vulnerability specifically targets the login_auth cookie parameter which is used to determine whether a user has successfully authenticated to the administrative interface. When an attacker manipulates this cookie value to true, the application incorrectly grants administrative privileges without requiring proper authentication credentials, effectively circumventing the entire authentication framework.
From a technical perspective, this vulnerability demonstrates a classic case of insecure authentication implementation where the application relies on client-side cookie manipulation to maintain session state. The flaw occurs because the application does not validate the authenticity of the login_auth cookie value against legitimate authentication records or server-side session data. This represents a violation of the principle of least privilege and demonstrates poor input validation practices. The vulnerability is classified under CWE-287 which addresses improper authentication mechanisms, specifically focusing on authentication bypass through manipulation of authentication tokens. The issue falls within the broader category of weak session management and inadequate access control enforcement, where the application trusts client-side data without proper server-side verification.
The operational impact of this vulnerability is severe as it allows unauthenticated attackers to gain full administrative control over the BandSite CMS instance. Once an attacker successfully sets the login_auth cookie to true, they can perform any administrative function including but not limited to modifying content, adding or removing users, changing configuration settings, uploading malicious files, and potentially using the compromised system as a launch point for further attacks within the network. This vulnerability also aligns with ATT&CK technique T1078 which covers legitimate credentials usage and privilege escalation, as attackers can leverage this flaw to obtain elevated privileges without detection. The remote nature of the attack means that an attacker can exploit this vulnerability from anywhere on the internet without requiring physical access or prior credentials, making it particularly dangerous for web applications.
Mitigation strategies for this vulnerability should focus on implementing robust server-side authentication validation and eliminating reliance on client-side cookie manipulation for privilege decisions. The primary fix involves modifying the application code to verify authentication status through legitimate server-side session management rather than trusting cookie values. This includes implementing proper session handling mechanisms, validating authentication tokens against secure server-side storage, and ensuring that administrative access is only granted after successful authentication through proper credential validation. Organizations should also implement additional security controls such as secure cookie attributes including HttpOnly and Secure flags, implement rate limiting for authentication attempts, and deploy web application firewalls to detect and prevent cookie manipulation attempts. Regular security testing including penetration testing and code reviews should be conducted to identify similar authentication bypass vulnerabilities in other applications. The fix should also include logging and monitoring of authentication-related activities to detect potential exploitation attempts and ensure compliance with security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity frameworks.