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WAFのルールである OWASP ModSecurity Core Rule Set (CRS...
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delphinz
September 21, 2018
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WAFのルールである OWASP ModSecurity Core Rule Set (CRS)を 使った可視化までの苦労話/20180921_owasp_connect_crs
delphinz
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Transcript
WAFͷϧʔϧͰ͋Δ OWASP ModSecurity Core Rule Set (CRS)Λ ͬͨՄࢹԽ·Ͱͷۤ࿑ !EFMQIJO[ 08"41$POOFDU!'PMJP
໊લɿ Masahiro Tabataʢ@delphinzʣ ࣄɿγεςϜίϯαϧλϯτ ηΩϡϦςΟͨ͠ͳΈఔ झຯओʹङྌ࠾ूɻ BBQͰϚάϩͦͯ͠ಲΛ͖͞·͢ɻ MINI
Hardening ӡӦϝϯόʔ(ϑΝγ Ϧςʔγϣϯʣͬͯ·͢♫ ࣗݾհ ʹ+"84%":Ͱ08"41ͱ .*/*IBSEFOJOHΛએதͷ༷ࢠ
.*/*IBSEFOJOHͰฉ͍ͨ ʢݫ͍͠ʣ͝ҙݟɾཁ ɾΠϚυΩ"QBDIFͱ͔Θͳ͍͠ʔʂ ɾ8"'ͱ͔ೖͬͯͳ͍αʔϏε͋Γ·͔͢ʔʁ
ΑΖ͍͠ ͳΒOHJOY NPETFDVSJUZͩʂ
NPETFDVSJUZʹ$34Λఴ͑ͯ .PETFDVSJUZ w .PE4FDVSJUZΦʔϓϯιʔεͷ8FCΞϓϦέʔγϣϯϑΝΠΞΥʔ ϧ 8"' Ͱɺ"QBDIFɺOHJOYɺ**4ͷϞδϡʔϧͱͯ͠ಈ࡞͢Δɻ ։ൃ4QJEFS-BCT͕ߦ͍ͬͯΔɻ IUUQTHJUIVCDPN4QJEFS-BCT.PE4FDVSJUZ 08"41NPETFDVSJUZ$PSF3VMF4FU
w 08"41͕ఏڙ͢ΔNPETFDVSJUZ༻ͷ߈ܸΛݕ͢Δجຊతͳϧʔϧ ηοτ IUUQTXXXPXBTQPSHJOEFYQIQ$BUFHPSZ08"
[email protected]
@$PSF@3VMF@4FU@1SPKFDU
OHJOY NPETFDVSJZͷ᠘ w "QBDIFͷ߹΄ͱΜͲͷMJOVYύοέʔδͰެࣜఏڙ͞ Ε͍ͯΔɻ OHJOYιʔε͔ΒͷϏϧυ͕ඞཁʂ w ެࣜͲ͏ΓʹͬͯઈରʹೖΒͳ͍ʂ CVJME࣌ͷϢʔβʔࢦఆ͕ඞཁ
ύοέʔδ͕Γͳ͍ͱಈ͔ͳ͍ɻ ΤϥʔΛు͔ͳ͍ʢٽʣ
͓Αͦਓྨͷखʹෛ͑ͳ͍ ϩάग़ྗܗࣜ
ՄࢹԽπʔϧΛࢼͯ͠ΈΔ w "VEJU$POTPMF NPETFDVSJUZͷϩάΛཧ͢ΔͨΊʹ࡞ΒΕͨ+BWBΞϓ Ϧέʔγϣϯ 5PNDBU্ʹల։͞Εͯ8&#ϒϥβ͔Βϩάͷऩूɺ อଘɺϑΟϧλϦϯάͳͲͷػೳΛఏڙ͢Δɻ IUUQXXXKXBMMPSHXFCBVEJUDPOTPMFJOEFYKTQ
͜Ε"VEJU$POTPMFͷ᠘͔ w +BWBܾΊଧͪɺެࣜͲ͓Γͩͱ͕ೖΓಈ͔ͳ͍ w SPPUҎԼʹஔ͠ͳ͍ͱϦΞϧλΠϜϩάऔࠐෆՄ w ϦΞϧλΠϜग़ྗʹඞཁͳNMPHDʢNPETFDVSJUZͷϩάग़ ྗπʔϧʣBQBDIF൛ͷΈରԠɺOHJOYඇରԠ w όονܗࣜͷସπʔϧ
QFSM OHJOY൛Ͱಈ͔ͳ͍ w BVEJUDPOTPMF͕ఏڙ͢Δϩάૹ৴πʔϧͰ༻ ʢͨͩ͠ɺҰׅૹ৴Ͱࠩૹ৴Ͱ͖ͳ͍ʣ
ແࣄʹՄࢹԽʹޭ͠·ͨ͠ʂ w ͱΓ͋͑ͣ.*/*IBSEFOJOHͰൃੜͨ͠NPETFDVSJZϩά ΛҰׅͰऔΓࠐΜͰΈΔͱ͜Μͳײ͡
͓·͚ɿ$34࡞ऀͷϫφ w 08"41ެࣜͷ$34ͷઆ໌ʹʮϥΠΞϯɾόʔωοτʯͷه ࡌ͋Γ w ʮϥΠΞϯɾόʔωοτʯͱ͍͑%%04ରࡦͷαʔϏεͰ ༗໊ͳ1SPMFYJDࣾʢͷͪʹ"LBNBJ͕ങऩʣͷۀऀ ʢৄࡉॻ੶ʮαΠόʔɾΫϥΠϜʯΛࢀরʣ
͡Όɺͳ͍ਓͩͬͨʂ
͓·͚ɿ$34࡞ऀͷϫφ w ޡΓʮ-ZPOʯਖ਼͘͠ʮ3ZBOʯͰͨ͠ɻ ϥΠΞϯɾόʔωοτͷ௲Γʹҙʂ ޡɿ ਖ਼ɿ ͪ͜Β͕$34ͷ࡞ऀͰͨ͠ʂ
݁ɿPTTͷΈͰͷ8"'ೖ ਏ͍ɺֶ͕ͼ͋ͬͨ w 8"'ͷΈΛΔ͜ͱ͕Ͱ͖ͨɻ ༻8"'Λ͑ͳ͍ਓPTT͔ΒॳΊͯྑ͍͔ɻ w ݕઐ༻ͷઃఆʹͯ͠ΒΕαʔόΛ͍͡ΔͱͲΜͳΞΫηε͕ 8"'ʹҾ͔͔ͬΔ͔ݟΕΔɻ w ଞͷPTT8"'࣌ؒ
ͱϞνϕʔγϣϯ ͕͋Εࢼͯ͠Έ͍ͨɻ w 7BHSBOU BOTJCMFͰॻ͍ͨͷͰHJUެ։͍ͨ͠ ͔ w ਖ਼͍͠࡞ऀ͕Θ͔ͬͨʂ
ͪΐͬͱࠂ .*/*IBSEFOJOH։࠵༧ఆ w ੈքॳʂʁɹςʔϚʮԾ௨՟ࢢΛकΓ͖Εʂʯ w ౦ژ!:BIPPͰ։࠵ɺͦͷޙෳճ։࠵༧ఆ ౦ژҎ֎Ͱ໊ݹɺେࡕͰͷ։࠵Λௐத ଞͷҬͰͷ։࠵ཁΛ͓͓ͪͯ͠Γ·͢ʂ w ࢀՃرͷํ$POOQBTTΛνΣοΫ͍ͯͩ͘͠͞ɻ
IUUQTNJOJIBSEFOJOHDPOOQBTTDPN
"QQFOEJY w 8FC"QQMJDBUJPO'JSFXBMM 8"' ಡຊվగୈ̎൛ IUUQTXXXJQBHPKQpMFTQEG w 08"41.PE4FDVSJUZ$PSF3VMF4FU3ZBO#BSOFUUQQU IUUQTXXXPXBTQPSHJOEFYQIQ 'JMF08"
[email protected]
@$PSF@3VMF@4FU3ZBO@#BSOFUUQQU