CWE-834: Excessive Iteration
Learn about CWE-834 (Excessive Iteration), its security impact, exploitation methods, and prevention guidelines.
What is Excessive Iteration?
• Overview: Excessive Iteration (CWE-834) occurs when a program executes a loop without adequately restricting the number of iterations, potentially leading to resource exhaustion.
• Exploitation Methods:
- Attackers can manipulate input to increase the number of loop iterations beyond intended limits.
- Common techniques include sending large or crafted data that causes the loop to execute excessively.
• Security Impact:
- Direct consequences include high CPU and memory usage, leading to degraded performance or denial of service.
- Potential cascading effects include system crashes or rendering the application unresponsive.
- Business impact involves service downtime, increased operational costs, and potential loss of customer trust.
• Prevention Guidelines:
- Implement limits on loop iterations, particularly for loops influenced by user input.
- Use input validation and sanitization to prevent malicious input from controlling loop behavior.
- Employ tools and frameworks that help detect and mitigate excessive iteration vulnerabilities, such as static analysis tools.
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Technical Details
Likelihood of Exploit: Not specified
Affected Languages: Not specified
Affected Technologies: Not specified