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refactor: create 941400 .ra file #4517

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Merged
fzipi merged 1 commit into from
Mar 3, 2026
Merged

refactor: create 941400 .ra file #4517

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33 changes: 33 additions & 0 deletions regex-assembly/941400.ra
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
##! Please refer to the documentation at
##! https://coreruleset.org/docs/development/regex_assembly/.

##! Please refer to the documentation at
##! https://coreruleset.org/docs/development/regex_assembly/.
##!
##! Rule 941400: XSS JavaScript function without parentheses
##! Detects attempts to invoke JavaScript functions via tagged template literals
##! without parentheses, using Array/Reflect method chaining.
##! e.g. [].sort.call`${alert}1337`
##! e.g. Reflect.apply.call`${navigation.navigate}${navigation}${[name]}`
##! Reference: https://portswigger.net/research/the-seventh-way-to-call-a-javascript-function-without-parentheses

##!> assemble
\[[^\]]*\][^.]*\.
Reflect[^.]*\.
##!=< array-or-reflect
##!<

##!> assemble
map
sort
apply
##!=< js-methods
##!<

##!> assemble
(
##!=> array-or-reflect
).*
##!=> js-methods
[^.]*\..*call[^`]*`.*`
##!<
7 changes: 6 additions & 1 deletion rules/REQUEST-941-APPLICATION-ATTACK-XSS.conf
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Expand Up @@ -809,7 +809,12 @@ SecRule REQUEST_COOKIES|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|REQUEST_FILENAME|X
# [].map.call`${eval}\\u{61}lert\x281337\x29`
# Reflect.apply.call`${navigation.navigate}${navigation}${[name]}`
#
SecRule REQUEST_COOKIES|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|REQUEST_FILENAME|XML:/* "@rx ((?:\[[^\]]*\][^.]*\.)|Reflect[^.]*\.).*(?:map|sort|apply)[^.]*\..*call[^`]*`.*`" \
# Regular expression generated from regex-assembly/941400.ra.
# To update the regular expression run the following shell script
# (consult https://coreruleset.org/docs/development/regex_assembly/ for details):
# crs-toolchain regex update 941400
#
SecRule REQUEST_COOKIES|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|REQUEST_FILENAME|XML:/* "@rx ((?:\[[^\]]*\]|Reflect)[^\.]*\.).*(?:map|sort|apply)[^\.]*\..*call[^`]*`.*`" \
"id:941400,\
phase:2,\
block,\
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