CVE-2008-7311 in Spree
Summary
by MITRE
The session cookie store implementation in Spree 0.2.0 uses a hardcoded config.action_controller_session hash value (aka secret key), which makes it easier for remote attackers to bypass cryptographic protection mechanisms by leveraging an application that contains this value within the config/environment.rb file.
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Analysis
by VulDB Data Team • 02/16/2019
The vulnerability identified as CVE-2008-7311 affects Spree e-commerce platforms version 0.2.0 and represents a critical cryptographic weakness in the session management system. This flaw stems from the implementation of session cookie storage that relies on a hardcoded secret key value within the application configuration file. The hardcoded nature of this cryptographic key fundamentally undermines the security posture of the affected system by eliminating the randomness and unpredictability essential for secure session handling. This vulnerability directly violates security best practices outlined in industry standards such as CWE-327, which specifically addresses the use of weak cryptographic algorithms and hardcoded secrets in security-critical components. The implementation in question exposes a fundamental design flaw where the cryptographic protection mechanisms intended to secure user sessions become ineffective due to the predictable nature of the hardcoded value.
The operational impact of this vulnerability extends beyond simple session hijacking to encompass broader cryptographic protection bypass mechanisms that can be leveraged by remote attackers. When an attacker gains access to the hardcoded secret key through the config/environment.rb file, they can generate valid session cookies for arbitrary user accounts, effectively enabling unauthorized access to administrative functions and user data. This weakness creates a pathway for attackers to impersonate legitimate users and potentially escalate privileges within the application. The vulnerability is particularly dangerous because it affects the core session management functionality, which is fundamental to maintaining user authentication state and application security boundaries. According to ATT&CK framework category T1566, this represents a credential access technique that exploits application-level weaknesses to bypass authentication mechanisms. The hardcoded nature of the secret key means that any individual with access to the application configuration files can exploit this vulnerability, making it a significant risk for applications deployed in environments where configuration files might be exposed or accessible to unauthorized parties.
Mitigation strategies for CVE-2008-7311 require immediate attention through configuration changes that eliminate the hardcoded secret key and implement proper cryptographic key management practices. Organizations should replace the hardcoded session secret with a randomly generated value stored in environment variables or secure configuration management systems, ensuring that each deployment has a unique and unpredictable cryptographic key. The recommended approach aligns with NIST SP 800-57 guidelines for cryptographic key management, which emphasize the importance of using strong, randomly generated keys and protecting them through appropriate access controls. Additionally, implementing proper file permissions and access controls on configuration files prevents unauthorized access to sensitive cryptographic information. Security teams should also consider implementing automated monitoring for configuration file changes and regular security audits to detect potential exposure of cryptographic keys. The fix requires updating the application configuration to use dynamic key generation rather than static values, which not only resolves this specific vulnerability but also establishes a more robust foundation for cryptographic security practices within the application. Regular updates and patches to the Spree platform should be implemented to ensure that newer versions contain properly implemented session management mechanisms that do not rely on hardcoded cryptographic values.