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Adding more WAF friendly fingerprinting payloads

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This commit is contained in:
Miroslav Štampar
2026-08-17 14:25:46 +02:00
parent 76ddd7a1b9
commit cbe892410c
10 changed files with 44 additions and 38 deletions
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lib/controller/action.py
+11 -8
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@@ -42,17 +42,19 @@ def action():
# First of all we have to identify the back-end database management
# system to be able to go ahead with the injection
# automatic WAF-bypass: if a WAF/IPS is present and the back-end DBMS is already indicated by the error
# page or the heuristic checks, skip active fingerprinting (the WAF would just block its payloads
# and flood the run with 403s) and assume that DBMS, so the user gets a usable result
if kb.wafBypass and not conf.forceDbms:
setHandler()
# automatic WAF-bypass: fingerprinting probes are kept off the WAF/IPS blacklists, so it is tried
# first even behind a protection. Only if it comes back empty the back-end DBMS is assumed from
# the error page or the heuristic checks, so that the user still gets a usable result
if kb.wafBypass and not conf.forceDbms and not Backend.getIdentifiedDbms():
fallback = Backend.getErrorParsedDBMSes() or ([kb.heuristicDbms] if kb.heuristicDbms else [])
fallback = next((_ for _ in fallback if _ and _.lower() in SUPPORTED_DBMS), None)
if fallback:
logger.warning("skipping active back-end DBMS fingerprinting behind the WAF/IPS and assuming '%s' from error/heuristic detection" % fallback)
logger.warning("active back-end DBMS fingerprinting did not get through the WAF/IPS. Assuming '%s' from error/heuristic detection" % fallback)
conf.forceDbms = fallback
setHandler()
setHandler()
# multi-bit blind ('--multi-bit'): the back-end is known now, so its bit arithmetic can be checked
# before nudging the user towards a channel that reads several characters per request (no requests)
@@ -64,8 +66,9 @@ def action():
# automatic WAF-bypass: with MySQL behind the WAF, make data retrieval AND table enumeration survive a
# libinjection-class WAF (e.g. OWASP CRS), verified end-to-end through ModSecurity/CRS:
# * fingerprinting was skipped, so flag has_information_schema (modern MySQL >=5.0 always has it) -
# otherwise enumeration wrongly assumes 'MySQL < 5.0' and bails with "no tables";
# * flag has_information_schema (modern MySQL >=5.0 always has it) in case the DBMS was assumed
# rather than fingerprinted, otherwise enumeration wrongly assumes 'MySQL < 5.0' and bails
# with "no tables",
# * 'blindbinary' reshapes the single-character read ORD(MID())->RIGHT(LEFT())>BINARY 0x.. (sheds the
# ORD/MID function names scored by 942151/942190);
# * 'infoschema2innodb' moves table enumeration off 'information_schema' (scored by 942140) onto