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

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

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

͋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)

[email protected]ͱ͸Կͳͷ͔ [email protected]ͷੜ֔Λ௥ͬͯΈͨ [email protected]ແ͖ੈΛͲ͏ੜ͖Δ͔ ΞδΣϯμ

[email protected]ͱ͸

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

register_globalsಈ࡞ྫ [email protected]0⒎

register_globalsಈ࡞ྫ [email protected]0O

register_globalsಈ࡞ྫ ϑΥʔϜͷ໊લ͕ ͦͷ··ม਺໊ʹ

register_globals ͷޭ੷ https://www.youtube.com/watch?v=wCZ5TJCBWMg&t=1339 QIQ%BZͷΩʔϊʔτl:FBSTPG1)1zͰ 3BTNVT͕[email protected]ʹ͍ͭͯݴٴ ʮ[email protected]͕ແ͚Ε͹  ɹɹࠓͷ1)1ͷൃల͸ແ͔ͬͨʯ ʮಈతͳ8FCϖʔδͷߏஙʹ׳Ε͍ͯͳ͍ ɹɹϢʔβ͕ଟ͍࣌୅ɺϑΥʔϜ໊ͦͷ··ͷ ɹɹม਺ΛࢀরͰ͖Δͷ͸ըظతͩͬͨʯ

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

҆શͰͳ͍ίʔυྫ [email protected]0⒎ https://www.php.net/manual/ja/security.globals.php

҆શͰͳ͍ίʔυྫ https://www.php.net/manual/ja/security.globals.php [email protected]0O

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

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

register_globals ͷҰੜ

register_globalsͷҰੜ

C w [email protected]͕࣮૷ w
͜ͷ࣌͸·ͩ[email protected]ͱ͍͏໊લͩͬͨ 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

ʙ PHP 4.0.6 ʙ೥લ൒ w
ηΩϡϦςΟʹؔ͢Δ໰͍߹Θ͕ͤࡴ౸ ʮ[email protected]͕શ෦ѱ͍ةݥʯ ʮ໰୊ʹͳ͍ͬͯΔίʔυ͸  ɹɹม਺ͷॳظԽ࿙ΕͳͲ؆୯ͳ΋ͷ΋͋Γɺ  ɹɹ͜ͷઃఆΛແ͚ͩ͘͢Ͱ͸ղܾ͠ͳ͍ʯ w ͦͷޙ΋͍Ζ͍Ζ͋Γɻɻ ϝʔϦϯάϦετͷ౤ߘ 3BTNVT

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

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๯಄

PHP 4.1.0 w
⚙εʔύʔάϩʔόϧม਺͕࣮૷ w @(&5΍@1045ͳͲ w ैདྷͷ)[email protected]@7"34ͱҧ͍ɺHMPCBMએݴͤͣʹ͢ ͙࢖͑ͯखܰ w ⚙[email protected]@WBSJBCMFT ͕࣮૷ w [email protected]ͷػೳΛͪΐͬͱ҆શʹͨ͠ܗͰ࠶ݱ ͢Δؔ਺ https://www.php.net/releases/4_1_0.php

PHP 4.1.0 w
⚙εʔύʔάϩʔόϧม਺͕࣮૷ w @(&5΍@1045ͳͲ w ैདྷͷ)[email protected]@7"34ͱҧ͍ɺHMPCBMએݴͤͣʹ͢ ͙࢖͑ͯखܰ w ⚙[email protected]@WBSJBCMFT ͕࣮૷ w [email protected]ͷػೳΛͪΐͬͱ҆શʹͨ͠ܗͰ࠶ݱ ͢Δؔ਺ https://www.php.net/releases/4_1_0.php [email protected]@WBSJBCMFT ͷྫ https://www.php.net/manual/en/function.import-request-variables

PHP 4.2.0 w
⚙[email protected]͕σϑΥϧτͰ0''ʹ https://www.php.net/releases/4_2_0.php

PHP 5.3.0 w
⚙[email protected]͕%FQSFDBUFEʹ https://www.php.net/releases/5_3_0.php

PHP 5.4.0 w
(PPECZF[email protected] w Ұॹʹফ͑ͨػೳ w [email protected] w [email protected] https://www.php.net/releases/5_4_0.php ⚰

register_globals ͸ҰੜΛऴ͕͑ͨ… C
⚰

register_globals ͸ҰੜΛऴ͕͑ͨ… Y ʜ ⚰ [email protected]͕࢖ΘΕ͍ͯͨ
ΞϓϦͷਓੜ͸ଓ͘ʂʂ

register_globals ͷͳ͍ ੈքͰੜ͖͍ͯͨ͘Ίʹ

[email protected]ґଘΛແ͘͠ɺ৽͍͠ਓੜΛ࢝ΊΔ w ਖ਼߈๏ Կ΋͠ͳ͍ 1)1·ͰͷΞοϓσʔτʹཹΊΔ w [email protected]Ҏ֎ͷ੬ऑੑʹ΋ରԠͰ͖ͳ͍
[email protected]Λ࠶ݱ͢ΔίʔυΛॻ͍ͯɺ1)1ͷόʔ δϣϯΛ্͛Δ w ⚔मཏͷಓ register_globals Λ࢖͍ͬͯͨ ΞϓϦ͸Ͳ͏ੜ͖࢒Ε͹͍͍͔? ͬͪ͜ͷ࿩Λ͠·͢

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

͜ͷख๏͸ؒҧ͍ͬͯ·͢ Կ͕ؒҧ͍ͬͯΔͷ͔ɺͲ͏͢Ε͹໰୊ͳ͍࠶ݱ ίʔυͳͷ͔Λ w [email protected]ॳڃฤ w [email protected]தڃฤ w [email protected]্ڃฤ Ͱݟ͍͖ͯ·͠ΐ͏

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

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

άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ ͲͬͪʹͳΔ

άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ ඇਪ঑ͷσΟϨΫςΟϒ[email protected]͕ POʹͳ͍ͬͯΔͱɺ[email protected]ͷઃ 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 [email protected]Λߟྀ͢Δඞཁ͕͋Δ

άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ ඇਪ঑ͷσΟϨΫςΟϒ[email protected]͕ POʹͳ͍ͬͯΔͱɺ[email protected]ͷઃ 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 [email protected]Λߟྀ͢Δඞཁ͕͋Δ [email protected]ͷྫ

register_globals ͷػೳ ॳڃฤ w ࢓༷άϩʔόϧม਺ʹϚʔδ͢Δॱ൪ w ରԠ[email protected]ʹै͏ தڃฤ
w ࢓༷ w ରԠ ্ڃฤ w ࢓༷ w ରԠ

w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠ ্ڃฤ w ࢓༷ w ରԠ

@4&44*0/ͱregister_globalsͷؔ܎

@4&44*0/ͱ[email protected]ͷؔ܎

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

w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠϦϑΝϨϯεͰ஥ྑ͘͠Α͏ ্ڃฤ w ࢓༷ w ରԠ

w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠϦϑΝϨϯεͰ஥ྑ͘͠Α͏ ্ڃฤ w ࢓༷@'*-&4ʹ͸ཁ஫ҙ w ରԠ

@'*-&4ͷ͓͞Β͍

@'*-&4͕άϩʔόϧม਺ʹͳΔͱʜ https://gongo.hatenablog.com/entry/2014/10/02/211520

@'*-&4͕άϩʔόϧม਺ʹͳΔͱʜ ͔ͦͬͪʙ https://gongo.hatenablog.com/entry/2014/10/02/211520

༨ஊ https://www.php.net/manual/ja/function.extract.php [email protected]͕POͷঢ়ଶͰ@'*-&4ʹ ରͯ͠FYUSBDU Λ࣮ߦͯ͠&[email protected],*1Λ ࢦఆ͢Δͱɺͦͷ݁Ռʹڻ͘͜ͱͰ͠ΐ͏ɻ FYUSBDU ͷϔϧϓʹॻ͔Ε͍ͯͨϝϞ

༨ஊ https://www.php.net/manual/ja/function.extract.php [email protected]͕POͷঢ়ଶͰ@'*-&4ʹ ରͯ͠FYUSBDU Λ࣮ߦͯ͠&[email protected],*1Λ ࢦఆ͢Δͱɺͦͷ݁Ռʹڻ͘͜ͱͰ͠ΐ͏ɻ FYUSBDU ͷϔϧϓʹॻ͔Ε͍ͯͨϝϞ ڻ͍ͨʙ

w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠϦϑΝϨϯεͰ஥ྑ͘͠Α͏ ্ڃฤ w ࢓༷@'*-&4ʹ͸ཁ஫ҙ w ରԠ͕Μ͹Ζ

w ࢓༷@4&44*0/ʹ͸஫ҙ w ରԠϦϑΝϨϯεͰ஥ྑ͘͠Α͏ ্ڃฤ w ࢓༷@'*-&4ʹ͸ཁ஫ҙ w ରԠ͕Μ͹Ζ w ͜Εશͯߟྀ͢Δͷେม w ΋͔ͨ͠͠Βଞʹ΋͋Δͷ͔ͳ w ࣗྗͰରԠ͢Δͷ͸΋͏ແཧͳΜ͡Ό ͦΜͳ͋ͳͨʹ ͪΐͬͱͨ͠࿕ใ͕

HPOHPNFSDJGVMQPMMVUFS w 1)1Ҏ্Ͱ[email protected]Λ࠶ݱ͢Δ ϥΠϒϥϦ w ೥݄ݱࡏɺ1)1·Ͱಈ࡞֬ೝ w ͓·͚Ͱ[email protected]@HQDʹ΋ରԠ w ௚༁͢Δͱ࣊൵ਂ͍Ԛછ
w ͋͘·Ͱ΋ܨ͗ͱͯ͠ߟ͑Δ΂͖ w 1)1όʔδϣϯΞοϓΛ࠷༏ઌʹʂ https://github.com/gongo/merciful-polluter

·ͱΊ

w [email protected]ͬͯ΍ͬͺ͍͢͝ʂ w ͍ΖΜͳҙຯͰ w [email protected]͕ᐫͱͳ͍ͬͯͯ1)1 ΞοϓσʔτͰ͖ͳ͍ਓɺఘΊͳ͍Ͱʂ w Ͳ͏ʹ͔ͳΓ·͢ ·ͱΊ

w 1)1ϚχϡΞϧ w IUUQTXXXQIQOFUNBOVBMKBJOEFYQIQ w 1)1ιʔείʔυ w IUUQTHJUIVCDPNQIQQIQTSDUSFFQIQ
w 1)1։ൃऀϝʔϦϯάϦετ "SDIJWF w IUUQTNBSDJOGP MQIQJOUFSOBMT ࢀߟจݙ

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

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

More Decks by Wataru MIYAGUNI

Other Decks in Programming

Featured

Transcript