CWE-606: Unchecked Input for Loop Condition

What is Unchecked Input for Loop Condition?

• Overview: Unchecked Input for Loop Condition occurs when software fails to validate inputs used to control loop execution, leading to potential excessive looping and resource exhaustion.

• Exploitation Methods:

• Attackers can provide malicious or malformed input to trigger infinite or excessively long loops.
• Common techniques include inputting large values or crafted inputs that create unintended loop execution paths.

• Security Impact:

• Direct consequences include denial of service due to system unresponsiveness.
• Potential cascading effects involve resource depletion, affecting other processes or services.
• Business impact includes reduced service availability, potential loss of revenue, and damage to reputation.

• Prevention Guidelines:

• Implement input validation to ensure loop control variables fall within expected and safe ranges.
• Use security best practices such as input sanitization and bounds checking.
• Recommended tools and frameworks include static analysis tools to detect improper input handling and modern language features that enforce safe loop constructs.

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Technical Details

Likelihood of Exploit: Not specified

Affected Languages: Not specified

Affected Technologies: Not specified