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refactor: create 942220 .ra file #4511

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Merged
fzipi merged 3 commits into from
Mar 10, 2026
+43 −2
Merged

refactor: create 942220 .ra file #4511

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729b2c2
refactor: create 942220 `.ra` file
fzipi Mar 2, 2026
ca977ec
Update regex-assembly/942220.ra
fzipi Mar 9, 2026
4a10913
Merge branch 'main' into regex-assembly/942220
fzipi Mar 9, 2026
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36 changes: 36 additions & 0 deletions regex-assembly/942220.ra
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Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
##! Please refer to the documentation at
##! https://coreruleset.org/docs/development/regex_assembly/.

##! Rule 942220: Integer overflow and PHP magic number crash detection
##!
##! Detects known magic numbers used in integer overflow attacks
##! (from skipfish) and the PHP strtod crash (CVE-2011-0753).
##!
##! Ref: https://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/

##!+ i

##!^ ^
##!$ $

##! 32-bit unsigned integer max / max+1
4294967295
4294967296

##! 32-bit signed integer max / min / (max+1/min-1)
2147483647
2147483648
-2147483648
-2147483649

##! leading-zero padded integers (skipfish probes)
0000012345
0000023456
-0000023456

##! PHP strtod crash: magic floating-point numbers (CVE-2011-0753)
2.2250738585072007e-308
2.2250738585072011e-308

##! infinity trigger
1e309
9 changes: 7 additions & 2 deletions rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf
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Expand Up @@ -226,8 +226,13 @@ SecRule REQUEST_COOKIES|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@rx (?i)[\

# Magic number crash in PHP strtod from 2011:
# https://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/

SecRule REQUEST_COOKIES|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@rx ^(?i:-0000023456|4294967295|4294967296|2147483648|2147483647|0000012345|-2147483648|-2147483649|0000023456|2.2250738585072007e-308|2.2250738585072011e-308|1e309)$" \
#
# Regular expression generated from regex-assembly/942220.ra.
# To update the regular expression run the following shell script
# (consult https://coreruleset.org/docs/development/regex_assembly/ for details):
# crs-toolchain regex update 942220
#
SecRule REQUEST_COOKIES|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@rx (?i)^(?:429496729[56]|2(?:14748364[78]|.22507385850720(?:07|11)e-308)|-(?:214748364[89]|0000023456)|00000(?:12345|23456)|1e309)$" \
"id:942220,\
phase:2,\
block,\
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