windows/powershell: fix regexp constraints in event 800 parameter detail processing #3495
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Pinging @elastic/security-external-integrations (Team:Security-External Integrations) |
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andrewkroh
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Jun 9, 2022
andrewkroh
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Jun 9, 2022
| @@ -229,7 +229,7 @@ processors: | |||
| field: param3 | |||
| source: |- | |||
| def parseRawDetail(String raw) { | |||
| Pattern detailRegex = /^(.+)\((.+)\)\:\s*(.+)?$/; | |||
| Pattern detailRegex = /^([^:(]+)\((.+)\)\:\s*(.+)?$/; | |||
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I don't know the answer, but I'm wondering if these are compiled on each function invocation. If they were outside the function maybe they would only be compiled once per processor execution. No need to change anything.
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I just tried that and it fails to compile if they are outside the function definition.
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What does this PR do?
This tightens constraints in the regular expression to prevent greedy consumption of the input and regexp complexity explosion.
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