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Merged
EsadCetiner merged 3 commits into from
Nov 11, 2025
Merged

feat(920440): add new restricted file extensions #4322

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bb0919b
feat(920440): add new restricted file extensions
touchweb-vincent Nov 7, 2025
5803abd
Update REQUEST-901-INITIALIZATION.conf
touchweb-vincent Nov 7, 2025
7fd8781
Update REQUEST-901-INITIALIZATION.conf
touchweb-vincent Nov 7, 2025
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4 changes: 2 additions & 2 deletions crs-setup.conf.example
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Original file line number Diff line number Diff line change
Expand Up @@ -556,7 +556,7 @@ SecDefaultAction "phase:2,log,auditlog,pass"

# Forbidden file extensions.
# Guards against unintended exposure of development/configuration files.
# Default: .ani/ .asa/ .asax/ .ascx/ .backup/ .bak/ .bat/ .cdx/ .cer/ .cfg/ .cmd/ .cnf/ .com/ .compositefont/ .config/ .conf/ .copy/ .crt/ .cs/ .csproj/ .csr/ .dat/ .db/ .dbf/ .dist/ .dll/ .dos/ .dpkg-dist/ .drv/ .gadget/ .hta/ .htr/ .htw/ .ida/ .idc/ .idq/ .inc/ .inf/ .ini/ .jse/ .key/ .licx/ .lnk/ .log/ .mdb/ .msc/ .ocx/ .old/ .pass/ .pdb/ .pfx/ .pif/ .pem/ .pol/ .prf/ .printer/ .pwd/ .rdb/ .rdp/ .reg/ .resources/ .resx/ .save/ .scr/ .sct/ .shs/ .sql/ .sqlite/ .sqlite3/ .swp/ .sys/ .temp/ .tlb/ .tmp/ .vb/ .vbe/ .vbs/ .vbproj/ .vsdisco/ .vxd/ .webinfo/ .ws/ .wsc/ .wsf/ .wsh/ .xsd/ .xsx/
# Default: .ani/ .asa/ .asax/ .ascx/ .back/ .backup/ .bak/ .bck/ .bk/ .bkp/ .bat/ .cdx/ .cer/ .cfg/ .cmd/ .cnf/ .com/ .compositefont/ .config/ .conf/ .copy/ .crt/ .cs/ .csproj/ .csr/ .dat/ .db/ .dbf/ .dist/ .dll/ .dos/ .dpkg-dist/ .drv/ .gadget/ .hta/ .htr/ .htw/ .ida/ .idc/ .idq/ .inc/ .inf/ .ini/ .jse/ .key/ .licx/ .lnk/ .log/ .mdb/ .msc/ .ocx/ .old/ .pass/ .pdb/ .pfx/ .pif/ .pem/ .pol/ .prf/ .printer/ .pwd/ .rdb/ .rdp/ .reg/ .resources/ .resx/ .sav/ .save/ .scr/ .sct/ .sh/ .shs/ .sql/ .sqlite/ .sqlite3/ .swp/ .sys/ .temp/ .tlb/ .tmp/ .vb/ .vbe/ .vbs/ .vbproj/ .vsdisco/ .vxd/ .webinfo/ .ws/ .wsc/ .wsf/ .wsh/ .xsd/ .xsx/
# Example: .bak/ .config/ .conf/ .db/ .ini/ .log/ .old/ .pass/ .pdb/ .rdb/ .sql/
# Note that .axd was removed due to false positives (see PR 1925).
#
Expand All @@ -576,7 +576,7 @@ SecDefaultAction "phase:2,log,auditlog,pass"
# nolog,\
# tag:'OWASP_CRS',\
# ver:'OWASP_CRS/4.21.0-dev',\
# setvar:'tx.restricted_extensions=.ani/ .asa/ .asax/ .ascx/ .backup/ .bak/ .bat/ .cdx/ .cer/ .cfg/ .cmd/ .cnf/ .com/ .compositefont/ .config/ .conf/ .copy/ .crt/ .cs/ .csproj/ .csr/ .dat/ .db/ .dbf/ .dist/ .dll/ .dos/ .dpkg-dist/ .drv/ .gadget/ .hta/ .htr/ .htw/ .ida/ .idc/ .idq/ .inc/ .inf/ .ini/ .jse/ .key/ .licx/ .lnk/ .log/ .mdb/ .msc/ .ocx/ .old/ .pass/ .pdb/ .pfx/ .pif/ .pem/ .pol/ .prf/ .printer/ .pwd/ .rdb/ .rdp/ .reg/ .resources/ .resx/ .save/ .scr/ .sct/ .shs/ .sql/ .sqlite/ .sqlite3/ .swp/ .sys/ .temp/ .tlb/ .tmp/ .vb/ .vbe/ .vbs/ .vbproj/ .vsdisco/ .vxd/ .webinfo/ .ws/ .wsc/ .wsf/ .wsh/ .xsd/ .xsx/'"
# setvar:'tx.restricted_extensions=.ani/ .asa/ .asax/ .ascx/ .back/ .backup/ .bak/ .bck/ .bk/ .bkp/ .bat/ .cdx/ .cer/ .cfg/ .cmd/ .cnf/ .com/ .compositefont/ .config/ .conf/ .copy/ .crt/ .cs/ .csproj/ .csr/ .dat/ .db/ .dbf/ .dist/ .dll/ .dos/ .dpkg-dist/ .drv/ .gadget/ .hta/ .htr/ .htw/ .ida/ .idc/ .idq/ .inc/ .inf/ .ini/ .jse/ .key/ .licx/ .lnk/ .log/ .mdb/ .msc/ .ocx/ .old/ .pass/ .pdb/ .pfx/ .pif/ .pem/ .pol/ .prf/ .printer/ .pwd/ .rdb/ .rdp/ .reg/ .resources/ .resx/ .sav/ .save/ .scr/ .sct/ .sh/ .shs/ .sql/ .sqlite/ .sqlite3/ .swp/ .sys/ .temp/ .tlb/ .tmp/ .vb/ .vbe/ .vbs/ .vbproj/ .vsdisco/ .vxd/ .webinfo/ .ws/ .wsc/ .wsf/ .wsh/ .xsd/ .xsx/'"

# Restricted request headers.
# The HTTP request headers that CRS restricts are split into two categories:
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2 changes: 1 addition & 1 deletion rules/REQUEST-901-INITIALIZATION.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -227,7 +227,7 @@ SecRule &TX:restricted_extensions "@eq 0" \
nolog,\
tag:'OWASP_CRS',\
ver:'OWASP_CRS/4.21.0-dev',\
setvar:'tx.restricted_extensions=.ani/ .asa/ .asax/ .ascx/ .backup/ .bak/ .bat/ .cdx/ .cer/ .cfg/ .cmd/ .cnf/ .com/ .compositefont/ .config/ .conf/ .copy/ .crt/ .cs/ .csproj/ .csr/ .dat/ .db/ .dbf/ .dist/ .dll/ .dos/ .dpkg-dist/ .drv/ .gadget/ .hta/ .htr/ .htw/ .ida/ .idc/ .idq/ .inc/ .inf/ .ini/ .jse/ .key/ .licx/ .lnk/ .log/ .mdb/ .msc/ .ocx/ .old/ .pass/ .pdb/ .pfx/ .pif/ .pem/ .pol/ .prf/ .printer/ .pwd/ .rdb/ .rdp/ .reg/ .resources/ .resx/ .save/ .scr/ .sct/ .shs/ .sql/ .sqlite/ .sqlite3/ .swp/ .sys/ .temp/ .tlb/ .tmp/ .vb/ .vbe/ .vbs/ .vbproj/ .vsdisco/ .vxd/ .webinfo/ .ws/ .wsc/ .wsf/ .wsh/ .xsd/ .xsx/'"
setvar:'tx.restricted_extensions=.ani/ .asa/ .asax/ .ascx/ .back/ .backup/ .bak/ .bck/ .bk/ .bkp/ .bat/ .cdx/ .cer/ .cfg/ .cmd/ .cnf/ .com/ .compositefont/ .config/ .conf/ .copy/ .crt/ .cs/ .csproj/ .csr/ .dat/ .db/ .dbf/ .dist/ .dll/ .dos/ .dpkg-dist/ .drv/ .gadget/ .hta/ .htr/ .htw/ .ida/ .idc/ .idq/ .inc/ .inf/ .ini/ .jse/ .key/ .licx/ .lnk/ .log/ .mdb/ .msc/ .ocx/ .old/ .pass/ .pdb/ .pfx/ .pif/ .pem/ .pol/ .prf/ .printer/ .pwd/ .rdb/ .rdp/ .reg/ .resources/ .resx/ .sav/ .save/ .scr/ .sct/ .sh/ .shs/ .sql/ .sqlite/ .sqlite3/ .swp/ .sys/ .temp/ .tlb/ .tmp/ .vb/ .vbe/ .vbs/ .vbproj/ .vsdisco/ .vxd/ .webinfo/ .ws/ .wsc/ .wsf/ .wsh/ .xsd/ .xsx/'"

# Default HTTP policy: restricted_headers_basic (rule 900250 in crs-setup.conf)
SecRule &TX:restricted_headers_basic "@eq 0" \
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