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DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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1 DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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2 DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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Dockerͱ • ίϯςφܕԾԽΛߦ͏ιϑτΣΞ • 2013ʹొ • GoݴޠͰॻ͔Ε͍ͯΔ • ίϯςφͱԾOSͷ͜ͱ • ҰͷϚγϯͰෳͷOS͕ಈ࡞͢Δ • Virtual BoxͳͲͷԾϚγϯͱগ͠ҧ͏ 3
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Dockerͱ 4 ϕου ϕου ϕου τΠϨ ෩࿊ Ω ο ν ϯ ҰݢՈ ཧϚγϯ ିϚϯγϣϯ ԾϚγϯ γΣΞϋε ίϯςφ *ࢀߟ: Docker࣮ઓ׆༻ ΨΠυ(ϚΠφϏग़൛)
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Dockerͱ ίϯςφ ԾϚγϯ OSͷىಈ ͍ ͍ Ϧιʔεফඅ গͳ͍ ଟ͍ OSͷछྨ LinuxͷΈ ͳΜͰ 5 ίϯςφ(Docker)ͱԾϚγϯ(Virtual Box)ͷൺֱ *ࢀߟ: Docker࣮ઓ׆༻ ΨΠυ(ϚΠφϏग़൛)
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6 DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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7 DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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OSίϚϯυΠϯδΣΫγϣϯͱ • Ϣʔβ͔ΒͷೖྗΛड͚͚ΔWebαΠτͰ ϓϩάϥϜͷύϥϝʔλʹOSʹର͢Δ ίϚϯυΛฆΕͤͯ͞ෆਖ਼ૢ࡞͢Δ߈ܸ 8 ෆਖ਼ͳίϚϯυ ΫϥοΧʔ ੬ऑੑͷ͋Δ Webαʔό ෆਖ਼ૢ࡞ ใ࿙Ӯ
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OSίϚϯυΠϯδΣΫγϣϯͱ • ҙίϚϯυΛ࣮ߦ͞ΕΔͷॏେͳ੬ऑੑ • ύεϫʔυͷ࿙Ӯ • cat /etc/passwd • ൿີ伴ͷ࿙Ӯ • cat ~/.ssh/id_rsa • αʔόͷσʔλશফ͠ • rm –rf / 9
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10 DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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11 DockerΛͬͯ OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botΛ࡞ͬͨ
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Slack botͱ • Slackօ͞Μ͓ೃછΈͷνϟοτπʔϧ • botͱػցʹΑΔࣗಈൃݴγεςϜ • αʔϏε͔Βఏڙ͞Ε͍ͯΔAPIΛୟ͍ͯ࡞Δ • ࠓճPythonͷslackhq/python-rtmbotͱ͍͏ FrameworkΛͬͨ 12
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Slack botͱ • ιʔείʔυ • https://github.com/odanado/slackbot-os- command-injection 13 OSίϚϯυΠϯδΣΫγϣϯ͕ ग़དྷΔSlack botͷ͍Β͢ͱ
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શମͷྲྀΕ 14 @͖Ͱ ίϚϯυૹ৴
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σϞ • ͝ҰॹʹͲ͏ͧ • Կͯ͠େৎͰ͢ • ϋοΩϯά͠Α͏ʂʂ 15 ࣮ࡍʹOSίϚϯυΠϯδΣΫγϣϯΛ ߦ͍·͢
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ࠓޙ • bashҎ֎ͷݴޠΛ࣮ߦͰ͖ΔΑ͏ʹͳΔ • Cݴޠ • Java • Python • Ruby • PHP • DockerͷಛੑΛ׆͔ͯ͠෦αʔόΛ෦һ͕ ࣗ༝ʹ͑ΔΑ͏ʹ͠·͢ • ࡞ۀ͕Ε͍ͯͯ͏͠Β͕͔͔࣌ؒ͘Γ·͢ • ͝ΊΜͳ͍͞... 16
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·ͱΊ • DockerίϯςφԾܕԽΛߦ͏πʔϧ • ߴʹىಈ͠ɼϦιʔεͷফඅྔ͕গͳ͍ • ͚ࣗͩͷڥ͕खʹೖΔ • OSίϚϯυΠϯδΣΫγϣϯॏେͳ੬ऑੑ • ύεϫʔυͷ࿙Ӯσʔλվ᜵ͷةݥ • Slack botSlack্Ͱͷࣗಈൃݴπʔϧ • ࠓճPythonͷFrameworkΛͬͨ 17