Fix ReDoS in previous-map #1567
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Fix Strategy: Replace `(.*)` with `(?:(?!sourceMappingURL=).)*`
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Thanks. Released in 8.2.13. |
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I'm looking at snyk and I don't understand how this would be exploited. Would you somehow need to construct a malicious source map (?) and inject it (?) into someone's build pipeline that uses postcss? |
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@AndrewRayCode yeap. It could be used on services like CodePen, when users use servers to compile user’s CSS. And it is not a real vulnerability. But a way to increase used resources. Even without fixing PostCSS you can add extra timeout check and kill commands which takes too much time. |
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Fix Strategy: Replace
(.*)with(?:(?!sourceMappingURL=).)*