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PHPerのためのよくわかるCPU脆弱性解説 / What's the Spectre for...
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HASEGAWA Tomoki
July 13, 2018
Technology
0
460
PHPerのためのよくわかるCPU脆弱性解説 / What's the Spectre for PHPers
PHPカンファレンス関西非公式前夜祭の資料です!
HASEGAWA Tomoki
July 13, 2018
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Transcript
୩ஐر 1)1FSͷͨΊͷΑ͘Θ͔Δ $16੬ऑੑղઆ
୩ஐر !UPN[PI
ϥΠϑϫʔΫ ςοΫΧϯϑΝϨϯεӡӦࢀՃ 8FCJ04ΞϓϦ։ൃ Ϗʔϧ ిࢠ࡞ αοΧʔ؍ઓ Ϩϯλ ϧΧʔτϨʔε
ʜ σδλϧαʔΧεגࣜձࣾ ෭ஂ$50 !UPN[PI
None
None
8FC%FWFMPQNFOUXJUI 8&"3&)*3*/( IUUQXXXEHDJSDVTDPN 0NPUFTBOEP 5PLZP
ࠓͷςʔϚ
$16ͷ੬ऑੑ4QFDUSF ε ϖ Ϋ λ ʔ
݄
IUUQTHPPHMFQSPKFDU[FSPCMPHTQPUKQSFBEJOHQSJWJMFHFENFNPSZXJUITJEFIUNM
XJUIBTJEFDIBOOFM ࣙॻӳࣙPOUIF8&# QSJWJMFHFE 3FBEJOH NFNPSZ
XJUIBTJEFDIBOOFM ࣙॻӳࣙPOUIF8&# 3FBEJOH NFNPSZ QSJWJMFHFE
XJUIBTJEFDIBOOFM ࣙॻӳࣙPOUIF8&# 3FBEJOH NFNPSZ QSJWJMFHFE QSJWJMFHFE ʲ໊ʳʬUIFʙʭಛݖ֊ڃʦʧ ʲܗʳಛݖΛ࣋ͭɺಛݖͷ͋Δ QSÍWɾJɾMFHFE
ಛݖྖҬͷϝϞϦΛ αΠυνϟωϧ੬ऑੑΛͬͯಡΈࠐΉ
ͭ·Γ
ಡΊ͍͚ͯͳ͍ϝϞϦྖҬΛ ಡΊͯ͠·͏
ͱͯେ͖ͳʹͳͬͨ
None
None
ͳͥେ͖ͳʹͳ͔ͬͨ
ᶃରʢͱࢥΘΕΔʣ$16͕͘͢͝ଟ͍
7BSJBOUTPGUIJTJTTVFBSFLOPXOUPBGGFDU NBOZNPEFSOQSPDFTTPST JODMVEJOHDFSUBJO QSPDFTTPSTCZ*OUFM ".%BOE"3. ᶃରʢͱࢥΘΕΔʣ$16͕͘͢͝ଟ͍
7BSJBOUTPGUIJTJTTVFBSFLOPXOUPBGGFDU NBOZNPEFSOQSPDFTTPST JODMVEJOHDFSUBJO QSPDFTTPSTCZ*OUFM ".%BOE"3. .BD 8JOEPXTϚγϯ 8FCαʔόͳͲ֤छαʔό ᶃରʢͱࢥΘΕΔʣ$16͕͘͢͝ଟ͍
7BSJBOUTPGUIJTJTTVFBSFLOPXOUPBGGFDU NBOZNPEFSOQSPDFTTPST JODMVEJOHDFSUBJO QSPDFTTPSTCZ*OUFM ".%BOE"3. .BD 8JOEPXTϚγϯ 8FCαʔόͳͲ֤छαʔό J1IPOF "OESPJE
ϧʔλ *P5ػث ᶃରʢͱࢥΘΕΔʣ$16͕͘͢͝ଟ͍
ᶄରࡦ͕औΓͮΒ͍
ᶄରࡦ͕औΓͮΒ͍ ৄࡉޙड़
ͲΜͳ੬ऑੑ͔
ͷલʹ$16جૅࣝ
جૅࣝΩϟογϡ
Ωϟογϡ
Ωϟογϡ $16ʹଂ͞ΕͨߴͳϝϞϦ
Ωϟογϡ ҰಡΜͩσʔλΩϟογϡʹஔ͘ $16ʹଂ͞ΕͨߴͳϝϞϦ
Ωϟογϡ ߴʹಈ࡞ͤ͞ΔͨΊʢϝϞϦ͍ʣ ҰಡΜͩσʔλΩϟογϡʹஔ͘ $16ʹଂ͞ΕͨߴͳϝϞϦ
Ωϟογϡ ݱͷ$16ΩϟογϡΛଟ༻͢Δ ߴʹಈ࡞ͤ͞ΔͨΊʢϝϞϦ͍ʣ ҰಡΜͩσʔλΩϟογϡʹஔ͘ $16ʹଂ͞ΕͨߴͳϝϞϦ
جૅࣝػత࣮ߦ
զʑ1)1FSͳͷͰ 1)1Ά͍ݴޠͰղઆ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ FDIP1$ FYJU FDIPl8PSME
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ FDIP1$ FYJU FDIPl8PSME ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ FDIP1$ FYJU FDIPl8PSME ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ࣮ߦ͢Δ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ FDIP1$ FYJU FDIPl8PSME ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ࣮ߦ͢Δ ʣͷJGͷ݁ՌʹΑͬͯ ແବʹͳΔ͚Ͳػతʹ࣮ߦ͢Δ
جૅࣝྫ֎
$16 ΞυϨεۭؒ(# ΞυϨεόεCJU G G G G G G
G G GGGGGGGG (#
$16 ΞυϨεۭؒ(# ΞυϨεόεCJU G G G G G G
G G GGGGGGGG (# 04
$16 ΞυϨεۭؒ(# ΞυϨεόεCJU G G G G G G
G G GGGGGGGG (# 04 ϢʔβϓϩάϥϜ ϢʔβϓϩάϥϜ
$16 ΞυϨεۭؒ(# ΞυϨεόεCJU G G G G G G
G G GGGGGGGG (# 04 ϢʔβϓϩάϥϜ ϢʔβϓϩάϥϜ͕ $16͕ڐՄ͠ͳ͍ ྖҬͷϝϞϦʹ ΞΫηε͢Δͱྫ֎ ϢʔβϓϩάϥϜ
IUUQMBCPSBUPSZTVCKQD IUNM
جૅࣝػత࣮ߦ جૅࣝΩϟογϡ جૅࣝྫ֎
جૅࣝػత࣮ߦ جૅࣝΩϟογϡ جૅࣝྫ֎ ҰϝϞϦ͔ΒಡΜͩσʔλΛߴͳϝϞϦʹஔ͍͓ͯ͘
جૅࣝػత࣮ߦ جૅࣝΩϟογϡ جૅࣝྫ֎ ҰϝϞϦ͔ΒಡΜͩσʔλΛߴͳϝϞϦʹஔ͍͓ͯ͘ ઌͷํΛ࣮ߦ͓ͯ͘͠
جૅࣝػత࣮ߦ جૅࣝΩϟογϡ جૅࣝྫ֎ ҰϝϞϦ͔ΒಡΜͩσʔλΛߴͳϝϞϦʹஔ͍͓ͯ͘ ઌͷํΛ࣮ߦ͓ͯ͘͠ $16͕ڐՄ͠ͳ͍ϝϞϦʹΞΫηε͢ΔͱΤϥʔ
$16ͷ੬ऑੑ4QFDUSF ε ϖ Ϋ λ ʔ
ઌʹ֓ཁΛղઆ
4QFDUSF֓ཁ
4QFDUSF֓ཁ wຊདྷΞΫηεͰ͖ͳ͍ྖҬʢ"ʣͷϝϞϦ༰Λ ಡΈࠐΈɺಡΈࠐΜͩΛͬͯผͷΞΫηεͰ͖ ΔྖҬʢ#ʣͷϝϞϦ༰ΛಡΈࠐΉɻ ˠྖҬʢ#ʣͷಛఆΞυϨε͕ΩϟογϡʹΔ
4QFDUSF֓ཁ wຊདྷΞΫηεͰ͖ͳ͍ྖҬʢ"ʣͷϝϞϦ༰Λ ಡΈࠐΈɺಡΈࠐΜͩΛͬͯผͷΞΫηεͰ͖ ΔྖҬʢ#ʣͷϝϞϦ༰ΛಡΈࠐΉɻ ˠྖҬʢ#ʣͷಛఆΞυϨε͕ΩϟογϡʹΔ wྖҬʢ#ʣͷϝϞϦΛ্͔Βॱ൪ʹಡΈࠐΈɺΧॴ ͚ͩಡΈࠐΈ͕͔ͬͨΞυϨεΛݟ͚ͭΔɻ
͜ΜͳϝϞϦϚοϓΛఆ
''' ϢʔβϓϩάϥϜ ϢʔβϓϩάϥϜ ผͷϓϩάϥϜ
͜ΜͳϓϩάϥϜ͕͋ͬͨͱ͢Δ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ͕࣮ߦ͞ΕΔ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ͕࣮ߦ͞ΕΔ ʣͷΛCʹ֨ೲɻ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ͕࣮ߦ͞ΕΔ ʣͷΛCʹ֨ೲɻ ຊདྷྫ֎͕ൃੜ͢ΔΞΫηε ػ࣮ߦதྫ֎ൃੜ͠ͳ͍ ʢൃੜͨ͠ΒࠔΔʣ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ͕࣮ߦ͞ΕΔ ʣͷΛCʹ֨ೲɻ ʣ C ͷΛ Dʹ֨ೲɻ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ͕࣮ߦ͞ΕΔ ʣͷΛCʹ֨ೲɻ ʣ C ͷΛ Dʹ֨ೲɻ w ʙGGͷൣғ w ϢʔβϓϩάϥϜ͔ΒΞΫηεͰ͖ΔྖҬ w ͜ͷΞΫηεͰʙGGͷ Ͳ͔͜ͷόΠτ͕ΩϟογϡʹΔ
ΞυϨε ༰ FDIP)FMMP BSBOE JG B
\HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ΞυϨεʣ ʣ͜͜ΒΜΛ࣮ߦ͍ͯ͠Δ࣌ʹʜ ʣઌߦͯ͜͜͠ΒΜ͕࣮ߦ͞ΕΔ ʣͷΛCʹ֨ೲɻ ʣ C ͷΛ Dʹ֨ೲɻ
ΞυϨε ༰ YY YY YY YY
YY YY YY GG YY ΞυϨε ༰ GPS JJJ \ TUBSUUJNF ESFBE J FOEUJNF JG FOETUBSU \ FDIPͷJͰͨ͠ʂʂ ^ ^ SFUVSO
ΞυϨε ༰ YY YY YY YY
YY YY YY GG YY ΞυϨε ༰ GPS JJJ \ TUBSUUJNF ESFBE J FOEUJNF JG FOETUBSU \ FDIPͷJͰͨ͠ʂʂ ^ ^ SFUVSO ॱ൪ʹಡΈࠐΈ͔͔ͯͬͨ࣌ؒ͠Λଌఆ
ΞυϨε ༰ YY YY YY YY
YY YY YY GG YY ΞυϨε ༰ GPS JJJ \ TUBSUUJNF ESFBE J FOEUJNF JG FOETUBSU \ FDIPͷJͰͨ͠ʂʂ ^ ^ SFUVSO ॱ൪ʹಡΈࠐΈ͔͔ͯͬͨ࣌ؒ͠Λଌఆ ͚ͩ͘͢͝ಡΈࠐΈ͕͔ͬͨ ͕Ωϟογϡʹ͍ͬͯͨ ຊདྷಡΊͳ͍ͷ༰ͩͬͨ
ΞυϨε ༰ YY YY YY YY
YY YY YY GG YY ΞυϨε ༰ GPS JJJ \ TUBSUUJNF ESFBE J FOEUJNF JG FOETUBSU \ FDIPͷJͰͨ͠ʂʂ ^ ^ SFUVSO ॱ൪ʹಡΈࠐΈ͔͔ͯͬͨ࣌ؒ͠Λଌఆ ΞυϨε ༰ FDIP)FMMP BSBOE JG B \HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ʣ ͚ͩ͘͢͝ಡΈࠐΈ͕͔ͬͨ ͕Ωϟογϡʹ͍ͬͯͨ ຊདྷಡΊͳ͍ͷ༰ͩͬͨ
ΞυϨε ༰ YY YY YY YY
YY YY YY GG YY ΞυϨε ༰ GPS JJJ \ TUBSUUJNF ESFBE J FOEUJNF JG FOETUBSU \ FDIPͷJͰͨ͠ʂʂ ^ ^ SFUVSO ॱ൪ʹಡΈࠐΈ͔͔ͯͬͨ࣌ؒ͠Λଌఆ ΞυϨε ༰ FDIP)FMMP BSBOE JG B \HPUP^ CSFBE DSFBE C ʢΞΫηεݖͷͳ͍ʣ
$16ͷ੬ऑੑ4QFDUSF ε ϖ Ϋ λ ʔ ʢݫີʹ4QFDUSFͱ.FMUEPXOͷ߹ͤʣ
͜Μͳ͓Ͱͨ͠
͓͠Ζ͍Ͱ͢Ͷʂ
ͱ͜ΖͰʜ
ᶄରࡦ͕औΓͮΒ͍
ᶄରࡦ͕औΓͮΒ͍ wۙͷ$16ɺ໋ྩΛ୯७Խͯ͠$16ͷσό ΠεͰۀͯ͠ॲཧ͢Δ͜ͱͰߴԽ͍ͯ͠Δɻ w$16ͷ֎ͷ͍σόΠεΛͨͩͪͨ͘ͳ͍ɻ $16ʹख͕ۭ͘σόΠεΛ࡞Γͨ͘ͳ͍ɻ wػత࣮ߦͦ͜ߴԽͷΩϞɻ
͓͠·͍ !UPN[PI w ࠙ձ w 1)1ΧϯϑΝϨϯεؔ ٳܜࣨʢʁʣ w 5XJUUFS w
#MPH
ສ͕Ұ͕࣌ؒ༨ͬͨͱ͖ͷͨΊͷ ͓·͚
%ʙ% "ʙ" *OUFM1FOUJVN
%ʙ% "ʙ" *OUFM1FOUJVN ΞυϨεόεϏοτ ʙGGGGGGGGͷ(# "ʙ"ݻఆ όΠτʢϏοτʣ୯ҐͷΞΫηε
ᶄରࡦ͕औΓͮΒ͍ wۙͷ$16ɺ໋ྩΛ୯७Խͯ͠$16ͷσό ΠεͰۀͯ͠ॲཧ͢Δ͜ͱͰߴԽ͍ͯ͠Δɻ w$16ͷ֎ͷ͍σόΠεΛͨͩͪͨ͘ͳ͍ɻ $16ʹख͕ۭ͘σόΠεΛ࡞Γͨ͘ͳ͍ɻ wػత࣮ߦͦ͜ߴԽͷΩϞɻ
Ͳ͏ͬͯରࡦ͍ͯ͠Δ͔
$16 ΞυϨεۭؒ(# ΞυϨεόεCJU G G G G G G
G G GGGGGGGG (# 04 ϢʔβϓϩάϥϜ
ذ༧ଌόοϑΝ
ذ༧ଌόοϑΝ wذΛ༧ଌͰ͖Δͱػ࣮ߦ͕ແବʹͳΓʹ͍͘ɻخ͍͠ɻ wաڈͷذΛهԱ͓͍ͯͯ͠ɺ֬తͳφχͰ༧ଌ͢Δɻ ʢذ༧ଌόοϑΝʣ wϐϯϙΠϯτʹʮ͜ͷذ໋ྩʯͱ͍͏όοϑΝͱɺॴʹ ݶΒͣʮ͜͜ذʯͱ͍͏࣌ؒతͳൣғͰఆΊͨόοϑΝ ͋Δɻ
ذ༧ଌόοϑΝ wذΛ༧ଌͰ͖Δͱػ࣮ߦ͕ແବʹͳΓʹ͍͘ɻخ͍͠ɻ wաڈͷذΛهԱ͓͍ͯͯ͠ɺ֬తͳφχͰ༧ଌ͢Δɻ ʢذ༧ଌόοϑΝʣ wϐϯϙΠϯτʹʮ͜ͷذ໋ྩʯͱ͍͏όοϑΝͱɺॴʹ ݶΒͣʮ͜͜ذʯͱ͍͏࣌ؒతͳൣғͰఆΊͨόοϑΝ ͋Δɻ $16͕ϓϩάϥϚͷบΛಡΜͰ͍Δ ʢͱݴ͑ΔͷͰͳ͍ͩΖ͏͔ʣ
()[ ճTFDԯճTFD ʢʢ5#TFDˠ5#TFDˠ(#TFDʣˠ(#TFDˠ(#TFDʣˠ.#TFD FUIFS ˠ.#TFD JOUFSFOU $16ͷΩϟογϡͱϝϞϦ $16
-.# (#TFD ίΞ -,# 5#TFD -,# 5#TFD ॲཧஔ ϝΠϯϝϞϦ (#(#TFD 44% 5#(#TFD
()[ ճTFDԯճTFD ʢʢ5#TFDˠ5#TFDˠ(#TFDʣˠ(#TFDˠ(#TFDʣˠ.#TFD FUIFS ˠ.#TFD JOUFSFOU $16ͷΩϟογϡͱϝϞϦ $16
-.# (#TFD ίΞ -,# 5#TFD -,# 5#TFD ॲཧஔ ϝΠϯϝϞϦ (#(#TFD 44% 5#(#TFD ഒ
()[ ճTFDԯճTFD ʢʢ5#TFDˠ5#TFDˠ(#TFDʣˠ(#TFDˠ(#TFDʣˠ.#TFD FUIFS ˠ.#TFD JOUFSFOU $16ͷΩϟογϡͱϝϞϦ $16
-.# (#TFD ίΞ -,# 5#TFD -,# 5#TFD ॲཧஔ ϝΠϯϝϞϦ (#(#TFD 44% 5#(#TFD ഒ ഒ
()[ ճTFDԯճTFD ʢʢ5#TFDˠ5#TFDˠ(#TFDʣˠ(#TFDˠ(#TFDʣˠ.#TFD FUIFS ˠ.#TFD JOUFSFOU $16ͷΩϟογϡͱϝϞϦ $16
-.# (#TFD ίΞ -,# 5#TFD -,# 5#TFD ॲཧஔ ϝΠϯϝϞϦ (#(#TFD 44% 5#(#TFD ഒ ഒ ഒ
()[ ճTFDԯճTFD ʢʢ5#TFDˠ5#TFDˠ(#TFDʣˠ(#TFDˠ(#TFDʣˠ.#TFD FUIFS ˠ.#TFD JOUFSFOU $16ͷΩϟογϡͱϝϞϦ $16
-.# (#TFD ίΞ -,# 5#TFD -,# 5#TFD ॲཧஔ ϝΠϯϝϞϦ (#(#TFD 44% 5#(#TFD ഒ ഒ ഒ ഒ
σʔλͷہॴੑ wϓϩάϥϜ͕σʔλΛΞΫηε͢Δ߹ɺ ͍ۙྖҬʹ࿈ଓͯ͠ΞΫηε͢Δ͜ͱ͕ ଟ͍ɻ w͍ۭۙؒతPS࣌ؒత
QIQ GPS JJJ \ FDIP)FMMP8PSME ^ L2 #0 EXT_STMT
L2 #1 ASSIGN $i 0 L2 #2 JMP J7 L3 #3 EXT_STMT L3 #4 ECHO "Hello World." L2 #5 POST_INC $i ~1 L2 #6 FREE ~1 L2 #7 IS_SMALLER $i 10 ~2 L2 #8 EXT_STMT L2 #9 JMPNZ ~2 J3 L6 #10 RETURN 1
QIQ GPS JJJ \ FDIP)FMMP8PSME ^ L2 #0 EXT_STMT
L2 #1 ASSIGN $i 0 L2 #2 JMP J7 L3 #3 EXT_STMT L3 #4 ECHO "Hello World." L2 #5 POST_INC $i ~1 L2 #6 FREE ~1 L2 #7 IS_SMALLER $i 10 ~2 L2 #8 EXT_STMT L2 #9 JMPNZ ~2 J3 L6 #10 RETURN 1 ۭؒతʹ͍ۙ ಉ͡ͱ͜ΖΛճ͍ͬͯΔ
QIQ GPS JJJ \ FDIP)FMMP8PSME ^ L2 #0 EXT_STMT
L2 #1 ASSIGN $i 0 L2 #2 JMP J7 L3 #3 EXT_STMT L3 #4 ECHO "Hello World." L2 #5 POST_INC $i ~1 L2 #6 FREE ~1 L2 #7 IS_SMALLER $i 10 ~2 L2 #8 EXT_STMT L2 #9 JMPNZ ~2 J3 L6 #10 RETURN 1
QIQ GPS JJJ \ FDIP)FMMP8PSME ^ L2 #0 EXT_STMT
L2 #1 ASSIGN $i 0 L2 #2 JMP J7 L3 #3 EXT_STMT L3 #4 ECHO "Hello World." L2 #5 POST_INC $i ~1 L2 #6 FREE ~1 L2 #7 IS_SMALLER $i 10 ~2 L2 #8 EXT_STMT L2 #9 JMPNZ ~2 J3 L6 #10 RETURN 1 Jʹසൟʹ ΞΫηε ͍ͯ͠Δ
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#MPH