Jenkins Webhook Secret Credentials Provider Plugin Bearer Token Comparison Weakness

Executive Summary

The Jenkins Webhook Secret Credentials Provider Plugin versions 16.v0cfa_f0215cf5 and earlier have a security flaw where the comparison of webhook bearer tokens is not done using a constant-time function. This could allow attackers to use timing analysis to guess a valid token.

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Detection Guidance

This vulnerability involves a timing attack due to non-constant-time comparison of webhook bearer tokens in Jenkins Webhook Secret Credentials Provider Plugin. Detection requires checking plugin versions and analyzing network traffic for timing discrepancies during token validation.

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Impact Analysis

An attacker could exploit this to gain unauthorized access to Jenkins webhooks by guessing valid bearer tokens through timing attacks, potentially leading to data breaches or unauthorized actions in the system.

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Compliance Impact

This vulnerability could potentially expose webhook bearer tokens, which may lead to unauthorized access to sensitive data. If exploited, it might violate data protection requirements under GDPR or HIPAA by enabling unauthorized disclosure of personal or health information.

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Mitigation Strategies

Update Jenkins Webhook Secret Credentials Provider Plugin to the latest version to ensure it uses a constant-time comparison function for webhook bearer token validation.

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