CWE-565: Reliance on Cookies without Validation and Integrity Checking

What is Reliance on Cookies without Validation and Integrity Checking?

• Overview: This vulnerability occurs when an application relies on cookies for security-critical operations without verifying their validity or ensuring their integrity, potentially allowing unauthorized access or manipulation.

• Exploitation Methods:

• Attackers can exploit this by tampering with cookies to gain unauthorized access or escalate privileges.
• Common techniques include cookie manipulation, session hijacking, and replay attacks, where altered cookies are used to bypass security checks.

• Security Impact:

• Direct consequences include unauthorized access to sensitive data or functions, privilege escalation, and session impersonation.
• Potential cascading effects involve broader access to application resources, data breaches, and compromised user accounts.
• Business impact may include loss of customer trust, legal liabilities, and financial losses due to data breaches.

• Prevention Guidelines:

• Implement server-side validation to ensure the correctness and authenticity of cookie values.
• Use secure cookie attributes such as 'HttpOnly' and 'Secure' to protect cookies from being accessed or transmitted insecurely.
• Employ strong cryptographic techniques to sign and encrypt cookie data, ensuring integrity and confidentiality.
• Regularly rotate session identifiers and invalidate them upon logout or after a set period.
• Use frameworks and tools that offer built-in mechanisms for secure cookie handling and session management.

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Technical Details

Likelihood of Exploit: Not specified

Affected Languages: Not specified

Affected Technologies: Not specified