今だからこそ振り返る register_globals / PHPerKaigi 2020

by Wataru MIYAGUNI

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ࠓ͔ͩΒͦ͜ৼΓฦΔ register_globals 1)1FS,BJHJ 5VF ٶᅳ౉@gongoZ

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@gongoZ github.com/gongo SmartHR, Inc. ࣗݾ঺հ

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͋ΒΏΔ΋ͷΛ&NBDTͰ࠶ݱ͢Δͷ͕झຯͰ͢ w "/&4&NVMBUPSXSJUUFOJO&NBDT-JTQ w ϑΝϛίϯΤϛϡϨʔλʔ w IUUQTHJUIVCDPNHPOHPFNBDTOFT w *NQMFNFOU+7.CZ&NBDT w &NBDT͕+7.ʹͳΔ w IUUQTHJUIVCDPNHPOHPFNBDTKWN ࣗݾ঺հ (Con’t)

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SFHJTUFS@HMPCBMTͱ͸Կͳͷ͔ SFHJTUFS@HMPCBMTͷੜ֔Λ௥ͬͯΈͨ SFHJTUFS@HMPCBMTແ͖ੈΛͲ͏ੜ͖Δ͔ ΞδΣϯμ

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SFHJTUFS@HMPCBMTͱ͸

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1)1ʙʹଘࡏ͍ͯͨ͠QIQJOJσΟϨΫςΟϒ register_globals ͱ͸? https://www.php.net/manual/ja/ini.core.php#ini.register-globals

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register_globalsಈ࡞ྫ SFHJTUFS@HMPCBMT0⒎

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register_globalsಈ࡞ྫ SFHJTUFS@HMPCBMT0O

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register_globalsಈ࡞ྫ ϑΥʔϜͷ໊લ͕ ͦͷ··ม਺໊ʹ

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register_globals ͷޭ੷ https://www.youtube.com/watch?v=wCZ5TJCBWMg&t=1339 QIQ%BZͷΩʔϊʔτl:FBSTPG1)1zͰ 3BTNVT͕SFHJTUFS@HMPCBMTʹ͍ͭͯݴٴ ʮSFHJTUFS@HMPCBMT͕ແ͚Ε͹  ɹɹࠓͷ1)1ͷൃల͸ແ͔ͬͨʯ ʮಈతͳ8FCϖʔδͷߏஙʹ׳Ε͍ͯͳ͍ ɹɹϢʔβ͕ଟ͍࣌୅ɺϑΥʔϜ໊ͦͷ··ͷ ɹɹม਺ΛࢀরͰ͖Δͷ͸ըظతͩͬͨʯ

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1)1ϚχϡΞϧηΩϡϦςΟάϩʔόϧม਺ͷొ࿥ػೳͷ࢖༻๏ ޫ͕͋Ε͹ҋ΋͋Δ https://www.php.net/manual/ja/security.globals.php

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҆શͰͳ͍ίʔυྫ SFHJTUFS@HMPCBMT0⒎ https://www.php.net/manual/ja/security.globals.php

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҆શͰͳ͍ίʔυྫ https://www.php.net/manual/ja/security.globals.php SFHJTUFS@HMPCBMT0O

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PHP ʹؔ͢Δ༗໊ͳݴ༿ (WebArchive) IPA ηΩϡΞϓϩάϥϛϯάߨ࠲ ୈ1ষ ΑΓྑ͍WebΞϓϦέʔγϣϯઃܭͷώϯτ

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w ✨͍͢͝ػೳ w ྑ͘΋ѱ͘΋1)1Λൃలཱͤͨ͞໾ऀ ·ͱΊ register_globals ͱ͸? ཱ໾ऀͷҰੜΛ ௥͍͔͚ͯΈ͍ͨʂʂ

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register_globals ͷҰੜ

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register_globalsͷҰੜ

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C w SFHJTUFS@HMPCBMT͕࣮૷ w ͜ͷ࣌͸·ͩHQD@HMPCBMTͱ͍͏໊લͩͬͨ w (&5 1045 $00,*&͚ͩΛର৅ w ͦΕҎ֎ 4&44*0/ͱ͔ ΋ѻ͏͜ͱʹͳͬͨ ͷͰ1)1CFUBͰϦωʔϜ https://github.com/php/php-src/commit/ab16816e PHP 4.0 beta 3

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ʙ PHP 4.0.6 ʙ೥લ൒ w ηΩϡϦςΟʹؔ͢Δ໰͍߹Θ͕ͤࡴ౸ ʮSFHJTUFS@HMPCBMT͕શ෦ѱ͍ةݥʯ ʮ໰୊ʹͳ͍ͬͯΔίʔυ͸  ɹɹม਺ͷॳظԽ࿙ΕͳͲ؆୯ͳ΋ͷ΋͋Γɺ  ɹɹ͜ͷઃఆΛແ͚ͩ͘͢Ͱ͸ղܾ͠ͳ͍ʯ w ͦͷޙ΋͍Ζ͍Ζ͋Γɻɻ ϝʔϦϯάϦετͷ౤ߘ 3BTNVT

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ʙ PHP 4.0.6 (Con’t) https://marc.info/?l=php-internals&m=99638397319055&w=2 w 1)1Ҏ߱ͷ1SPQPTBMΛ3BTNVT͕ ։ൃऀϝʔϦϯάϦετʹ౤ߘ ҎԼɺཁ໿ ɹʮσϑΥϧτ͸P⒎ʹ͠·͠ΐ͏ʯ ɹʮ(&5΍1045ʹରͯ͠ ҆શ͸౰વͱͯ͠   ɹɹɹखܰʹΞΫηεͰ͖Δ࢓૊Έ͸࢒͓͖͍ͯͨ͠ʯ

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ʙ PHP 4.0.6 (Con’t) https://marc.info/?l=php-internals&m=99638397319055&w=2 w ✍1)1Ҏ߱ͷ1SPQPTBMΛ3BTNVT͕ ։ൃऀϝʔϦϯάϦετʹ౤ߘ ͜ΜͳจষͰ࢝·͍ͬͯ·ͨ͠ 5IFCFTUUIJOHBCPVU1)1JTUIBUJUIBTTVDIB TIBMMPXMFBSOJOHDVSWFUIBUOPOQSPHSBNNFST DBOXSJUFXFCBQQT 5IFXPSTUUIJOHBCPVU1)1JTUIBUJUIBTTVDI BTIBMMPXMFBSOJOHDVSWFUIBUOPO QSPHSBNNFSTXSJUFXFCBQQT WJB1SPQPTBMͷ๯಄

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PHP 4.1.0 w ⚙εʔύʔάϩʔόϧม਺͕࣮૷ w @(&5΍@1045ͳͲ w ैདྷͷ)551@YYY@7"34ͱҧ͍ɺHMPCBMએݴͤͣʹ͢ ͙࢖͑ͯखܰ w ⚙JNQPSU@SFRVFTU@WBSJBCMFT ͕࣮૷ w SFHJTUFS@HMPCBMTͷػೳΛͪΐͬͱ҆શʹͨ͠ܗͰ࠶ݱ ͢Δؔ਺ https://www.php.net/releases/4_1_0.php

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PHP 4.2.0 w ⚙SFHJTUFS@HMPCBMT͕σϑΥϧτͰ0''ʹ https://www.php.net/releases/4_2_0.php

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PHP 5.3.0 w ⚙SFHJTUFS@HMPCBMT͕%FQSFDBUFEʹ https://www.php.net/releases/5_3_0.php

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PHP 5.4.0 w (PPECZFSFHJTUFS@HMPCBMT w Ұॹʹফ͑ͨػೳ w NBHJD@RVPUFT w TBGF@NPEF https://www.php.net/releases/5_4_0.php ⚰

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register_globals ͸ҰੜΛऴ͕͑ͨ… C ⚰

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register_globals ͸ҰੜΛऴ͕͑ͨ… Y ʜ ⚰ SFHJTUFS@HMPCBMT͕࢖ΘΕ͍ͯͨ ΞϓϦͷਓੜ͸ଓ͘ʂʂ

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register_globals ͷͳ͍ ੈքͰੜ͖͍ͯͨ͘Ίʹ

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SFHJTUFS@HMPCBMTґଘΛແ͘͠ɺ৽͍͠ਓੜΛ࢝ΊΔ w ਖ਼߈๏ Կ΋͠ͳ͍ 1)1·ͰͷΞοϓσʔτʹཹΊΔ w SFHJTUFS@HMPCBMTҎ֎ͷ੬ऑੑʹ΋ରԠͰ͖ͳ͍ SFHJTUFS@HMPCBMTΛ࠶ݱ͢ΔίʔυΛॻ͍ͯɺ1)1ͷόʔ δϣϯΛ্͛Δ w ⚔मཏͷಓ register_globals Λ࢖͍ͬͯͨ ΞϓϦ͸Ͳ͏ੜ͖࢒Ε͹͍͍͔? ͬͪ͜ͷ࿩Λ͠·͢

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php.net Ͱௐ΂ͯΈ·ͨ͠ https://www.php.net/manual/en/faq.misc.php )PXEP*EFBMXJUIregister_globals

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͜ͷख๏͸ؒҧ͍ͬͯ·͢ Կ͕ؒҧ͍ͬͯΔͷ͔ɺͲ͏͢Ε͹໰୊ͳ͍࠶ݱ ίʔυͳͷ͔Λ w SFHJTUFS@HMPCBMTॳڃฤ w SFHJTUFS@HMPCBMTதڃฤ w SFHJTUFS@HMPCBMT্ڃฤ Ͱݟ͍͖ͯ·͠ΐ͏

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register_globals ͷػೳ ॳڃฤ w ࢓༷ w ରԠ தڃฤ w ࢓༷ w ରԠ ্ڃฤ w ࢓༷ w ରԠ

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register_globals ͷػೳ ॳڃฤ w ࢓༷άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ w ରԠ தڃฤ w ࢓༷ w ରԠ ্ڃฤ w ࢓༷ w ରԠ

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άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ ͲͬͪʹͳΔ

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άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ ඇਪ঑ͷσΟϨΫςΟϒSFHJTUFS@HMPCBMT͕ POʹͳ͍ͬͯΔͱɺWBSJBCMFT@PSEFSͷઃ ఆ͸ɺ&/7ɺ(&5ɺ1045ɺ$00,*&͓Α ͼ4&37&3ͷ֤ม਺͕άϩʔόϧείʔϓ ʹऔΓࠐ·ΕΔॱ൪΋ࠨӈ͠·͢ɻ https://www.php.net/manual/ja/ini.core.php#ini.variables-order WBSJBCMFT@PSEFSΛߟྀ͢Δඞཁ͕͋Δ

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register_globals ͷػೳ ॳڃฤ w ࢓༷άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ w ରԠWBSJBCMFT@PSEFSʹै͏ தڃฤ w ࢓༷ w ରԠ ্ڃฤ w ࢓༷ w ରԠ

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register_globals ͷػೳ ॳڃฤ w ࢓༷άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ w ରԠWBSJBCMFT@PSEFSʹै͏ தڃฤ w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠ ্ڃฤ w ࢓༷ w ରԠ

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@4&44*0/ͱregister_globalsͷؔ܎

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@4&44*0/ͱSFHJTUFS@HMPCBMTͷؔ܎

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ηογϣϯม਺ͷΈࢀর౉͠ https://gongo.hatenablog.com/entry/2014/12/24/132841 w @(&5΍@1045ͳͲͱಉ͘͡ѻͬͯ͸ବ໨ w ͜͏͍͏ΠϝʔδͰ

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register_globals ͷػೳ ॳڃฤ w ࢓༷άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ w ରԠWBSJBCMFT@PSEFSʹै͏ தڃฤ w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠϦϑΝϨϯεͰ஥ྑ͘͠Α͏ ্ڃฤ w ࢓༷ w ରԠ

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register_globals ͷػೳ ॳڃฤ w ࢓༷άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ w ରԠWBSJBCMFT@PSEFSʹै͏ தڃฤ w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠϦϑΝϨϯεͰ஥ྑ͘͠Α͏ ্ڃฤ w ࢓༷@'*-&4ʹ͸ཁ஫ҙ w ରԠ

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