# ------------------------------------------------------------------------ # OWASP CRS ver.4.24.0-dev # Copyright (c) 2006-2020 Trustwave and contributors. All rights reserved. # Copyright (c) 2021-2026 CRS project. All rights reserved. # # The OWASP CRS is distributed under # Apache Software License (ASL) version 2 # Please see the enclosed LICENSE file for full details. # ------------------------------------------------------------------------ # We reused paranoia level skip rules 950010, 950011, and 950018. # These rule identifiers were in use in CRSv2, so we used different # identifiers in CRSv3 to avoid conflicts (950020, 950021 and 950022). # In CRSv4, for the sake of a consistent structure, we use these # identifiers again, so that the skip rules of PL can be defined in the # same way for all files. # Rule id 950130 has been kept - this ID also was introduced at first # rule to avoid the collision. # # -= Paranoia Level 0 (empty) =- (apply unconditionally) # # Skip all rules if TX:crs_skip_response_analysis is set. SecRule TX:crs_skip_response_analysis "@eq 1" \ "id:950021,\ phase:3,\ pass,\ nolog,\ tag:'OWASP_CRS',\ tag:'OWASP_CRS/DATA-LEAKAGES',\ ver:'OWASP_CRS/4.24.0-dev',\ skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION" # Skip all rules if RESPONSE_BODY is compressed. SecRule RESPONSE_HEADERS:Content-Encoding "@pm gzip compress deflate br zstd" \ "id:950010,\ phase:4,\ pass,\ nolog,\ tag:'OWASP_CRS',\ tag:'OWASP_CRS/DATA-LEAKAGES',\ ver:'OWASP_CRS/4.24.0-dev',\ skipAfter:END-RESPONSE-950-DATA-LEAKAGES" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 1" "id:950011,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 1" "id:950012,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" # # -= Paranoia Level 1 (default) =- (apply only when tx.detection_paranoia_level is sufficiently high: 1 or higher) # # # -=[ Directory Listing ]=- # SecRule RESPONSE_BODY "@rx (?:<(?:TITLE>Index of.*?Index of.*?Index of|>\[To Parent Directory\]
)" \ "id:950130,\ phase:4,\ block,\ capture,\ t:none,\ msg:'Directory Listing',\ logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}',\ tag:'application-multi',\ tag:'language-multi',\ tag:'platform-multi',\ tag:'attack-disclosure',\ tag:'paranoia-level/1',\ tag:'OWASP_CRS',\ tag:'OWASP_CRS/DATA-LEAKAGES',\ tag:'capec/1000/118/116/54/127',\ ver:'OWASP_CRS/4.24.0-dev',\ severity:'ERROR',\ setvar:'tx.outbound_anomaly_score_pl1=+%{tx.error_anomaly_score}'" # # -=[ CGI Source Code Leakage ]=- # # A CGI script begins normally with #! and the interpreter, # for example: # # #!/usr/bin/perl # #!/usr/bin/python # #!/usr/bin/ruby # # If the CGI script processors or MIME type handlers are misconfigured, # the script's source code could be erroneously returned to the client. SecRule RESPONSE_BODY "@rx ^#\!\s?/" \ "id:950140,\ phase:4,\ block,\ capture,\ t:none,\ msg:'CGI source code leakage',\ logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}',\ tag:'application-multi',\ tag:'language-multi',\ tag:'platform-multi',\ tag:'attack-disclosure',\ tag:'paranoia-level/1',\ tag:'OWASP_CRS',\ tag:'OWASP_CRS/DATA-LEAKAGES',\ tag:'capec/1000/118/116',\ ver:'OWASP_CRS/4.24.0-dev',\ severity:'ERROR',\ setvar:'tx.outbound_anomaly_score_pl1=+%{tx.error_anomaly_score}'" # # -=[ ASP.NET Errors ]=- # SecRule RESPONSE_BODY "@pmFromFile asp-dotnet-errors.data" \ "id:950150,\ phase:4,\ block,\ capture,\ t:none,\ msg:'ASP.NET exception leakage',\ logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}',\ tag:'application-multi',\ tag:'language-aspnet',\ tag:'platform-multi',\ tag:'attack-disclosure',\ tag:'paranoia-level/1',\ tag:'OWASP_CRS',\ tag:'OWASP_CRS/DATA-LEAKAGES',\ tag:'capec/1000/118/116/54/127',\ ver:'OWASP_CRS/4.24.0-dev',\ severity:'ERROR',\ setvar:'tx.outbound_anomaly_score_pl1=+%{tx.error_anomaly_score}'" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 2" "id:950013,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 2" "id:950014,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" # # -= Paranoia Level 2 =- (apply only when tx.detection_paranoia_level is sufficiently high: 2 or higher) # # # -=[ The application is not available - 5xx level status code ]=- # SecRule RESPONSE_STATUS "@rx ^5\d{2}$" \ "id:950100,\ phase:3,\ block,\ capture,\ t:none,\ msg:'The Application Returned a 500-Level Status Code',\ logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}',\ tag:'application-multi',\ tag:'language-multi',\ tag:'platform-multi',\ tag:'attack-disclosure',\ tag:'paranoia-level/2',\ tag:'OWASP_CRS',\ tag:'OWASP_CRS/DATA-LEAKAGES',\ tag:'capec/1000/152',\ ver:'OWASP_CRS/4.24.0-dev',\ severity:'ERROR',\ setvar:'tx.outbound_anomaly_score_pl2=+%{tx.error_anomaly_score}'" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 3" "id:950015,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 3" "id:950016,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" # # -= Paranoia Level 3 =- (apply only when tx.detection_paranoia_level is sufficiently high: 3 or higher) # SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 4" "id:950017,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 4" "id:950018,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.24.0-dev',skipAfter:END-RESPONSE-950-DATA-LEAKAGES" # # -= Paranoia Level 4 =- (apply only when tx.detection_paranoia_level is sufficiently high: 4 or higher) # # # -= Paranoia Levels Finished =- # SecMarker "END-RESPONSE-950-DATA-LEAKAGES"