جزئیات آسیب‌پذیری

RE2JS is the JavaScript port of RE2, a regular expression engine that provides linear time matching. From 2.2.0 until 2.8.7, enabling LOOKBEHINDS and using repeated matching through matcher().find(), matchAll(), split(), or matcher().replaceAll() can cause quadratic total work. Machine.match restarts lookbehind scanning from offset zero for each requested start position, while Matcher-based APIs request capture slots that prevent the early exit used for captureless matching. Dense matches therefore repeatedly rescan the input, allowing attacker-influenced text to monopolize a single-threaded worker and deny service. This issue is fixed in version 2.8.7.

• https://github.com/le0pard/re2js/pull/59 x_refsource_MISC
• https://github.com/le0pard/re2js/commit/dfdd947785dfa113bdc97416375c246a39458395 x_refsource_MISC
• https://github.com/le0pard/re2js/releases/tag/2.8.7 x_refsource_MISC
• https://github.com/le0pard/re2js/security/advisories/GHSA-gg6h-894w-4m9c x_refsource_CONFIRM