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RE2 compatibility for 920120 #1663

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RE2 compatibility for 920120 #1663

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337f740
RE2 compatibility for 920120
allanrbo Jan 10, 2020
1e84125
Script to generate alternative to negative lookbehinds
allanrbo Jan 14, 2020
2b7ea5b
quotes issue in test
allanrbo Jan 14, 2020
7e9bc8b
Removed test that doesnt work on Apache
allanrbo Jan 14, 2020
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11 changes: 7 additions & 4 deletions rules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,12 @@ SecRule REQUEST_LINE "!@rx ^(?i:(?:[a-z]{3,10}\s+(?:\w{3,7}?://[\w\-\./]*(?::\d+
# These rules check for the existence of the ' " ; = meta-characters in
# either the file or file name variables.
# HTML entities may lead to false positives, why they are allowed on PL1.
# Negative look behind assertions allow frequently used entities &_;
# Frequently used HTML entities such as ä are allowed.
#
# To be compatible with non-PCRE regex engines, negative lookbehinds are
# avoided. Instead the script in util/regexp-negativelookbehind was used to
# generate an alternative equivalent regex:
# ./negativelookbehind.py negativelookbehind-920120.data
#
# -=[ Targets, characters and html entities ]=-
#
Expand All @@ -90,13 +95,11 @@ SecRule REQUEST_LINE "!@rx ^(?i:(?:[a-z]{3,10}\s+(?:\w{3,7}?://[\w\-\./]*(?::\d+
# 920121: PL2 : FILES_NAMES, FILES
# ['\";=] : ' " ; = meta-characters
#
# Not supported by re2 (?<!re).
#
# -=[ References ]=-
# https://www.owasp.org/index.php/ModSecurity_CRS_RuleID-960000
# http://www.ietf.org/rfc/rfc2183.txt
#
SecRule FILES_NAMES|FILES "@rx (?<!&(?:[aAoOuUyY]uml)|&(?:[aAeEiIoOuU]circ)|&(?:[eEiIoOuUyY]acute)|&(?:[aAeEiIoOuU]grave)|&(?:[cC]cedil)|&(?:[aAnNoO]tilde)|&(?:amp)|&(?:apos));|['\"=]" \
SecRule FILES_NAMES|FILES "@rx (?:(?:^|[^lceps])|(?:^|[^mi])l|(?:^|[^r])c|(?:^|[^tvd])e|(?:^|[^m])p|(?:^|[^o])s|(?:^|[^u])ml|(?:^|[^i])rc|(?:^|[^u])te|(?:^|[^a])ve|(?:^|[^d])il|(?:^|[^l])de|(?:^|[^a])mp|(?:^|[^p])os|(?:^|[^aAoOuUyY])uml|(?:^|[^c])irc|(?:^|[^c])ute|(?:^|[^r])ave|(?:^|[^e])dil|(?:^|[^i])lde|(?:^|[^&])amp|(?:^|[^a])pos|(?:^|[^&])[aAoOuUyY]uml|(?:^|[^aAeEiIoOuU])circ|(?:^|[^a])cute|(?:^|[^g])rave|(?:^|[^c])edil|(?:^|[^t])ilde|(?:^|[^&])apos|(?:^|[^&])[aAeEiIoOuU]circ|(?:^|[^eEiIoOuUyY])acute|(?:^|[^aAeEiIoOuU])grave|(?:^|[^cC])cedil|(?:^|[^aAnNoO])tilde|(?:^|[^&])[eEiIoOuUyY]acute|(?:^|[^&])[aAeEiIoOuU]grave|(?:^|[^&])[cC]cedil|(?:^|[^&])[aAnNoO]tilde);|['\"=]" \
"id:920120,\
phase:2,\
block,\
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