Sentinel: [HIGH] Fix ReDoS vulnerability in matchPatternToRegExp #61
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🚨 Severity: HIGH 💡 Vulnerability: The `matchPatternToRegExp` function was vulnerable to Regular Expression Denial of Service (ReDoS). It converted glob patterns (specifically the path component) into regex by replacing `*` with `.*`. A pattern like `*a*a*a...` would generate a regex with exponential backtracking complexity on mismatch. 🎯 Impact: An attacker who can influence the `exclude` settings (via sync storage or social engineering) could provide a malicious pattern that hangs the background service worker, effectively disabling the extension and potentially freezing the browser process. 🔧 Fix: Replaced the regex-based matching with a custom `matchesPattern` function. This function parses the URL using the `URL` API and implements a linear-time O(N) matching algorithm for the path component, ensuring safe execution regardless of input. ✅ Verification: Verified using a reproduction script that the original code took >250s for a malicious input, while the new code executes in <1ms. Correctness was also verified against standard match patterns.
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Sentinel: [HIGH] Fix ReDoS vulnerability in matchPatternToRegExp
🚨 Severity: HIGH
💡 Vulnerability: The
matchPatternToRegExpfunction was vulnerable to Regular Expression Denial of Service (ReDoS). It converted glob patterns (specifically the path component) into regex by replacing*with.*. A pattern like*a*a*a...would generate a regex with exponential backtracking complexity on mismatch.🎯 Impact: An attacker who can influence the
excludesettings (via sync storage or social engineering) could provide a malicious pattern that hangs the background service worker, effectively disabling the extension and potentially freezing the browser process.🔧 Fix: Replaced the regex-based matching with a custom
matchesPatternfunction. This function parses the URL using theURLAPI and implements a linear-time O(N) matching algorithm for the path component, ensuring safe execution regardless of input.✅ Verification: Verified using a reproduction script that the original code took >250s for a malicious input, while the new code executes in <1ms. Correctness was also verified against standard match patterns.
PR created automatically by Jules for task 7758767739022378649 started by @NDevTK