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脅威モデリングにおける失敗とは
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Maakkie
March 19, 2025
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脅威モデリングにおける失敗とは
2025/3/18 脅威モデリングナイト#7 発表資料
Maakkie
March 19, 2025
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Transcript
!.BBLLJF ڴҖϞσϦϯάʹ͓͚Δࣦഊͱ ڴҖϞσϦϯάφΠτJO5PLZP
ຊͷΞδΣϯμ ڴҖϞσϦϯάʹ͓͚Δࣦഊͱ ࣗݾհ ڴҖϞσϦϯά֓ཁ ڴҖϞσϦϯάͷཧܥ ڴҖϞσϦϯάʹ͓͚Δࣦഊͱ
w ࣦഊʹܨ͕Δཁૉ ·ͱΊ
ࣗݾհ w ηΩϡϦςΟϕϯμʔͰηΩϡϦςΟίϯαϧλϯτ w ސ٬ͷʮηΩϡϦςΟࠔͬͨʯΛղܾ͢Δ෦ॺ w 8FCܥ։ൃʴηΩϡϦςΟϕϯμʔ w झຯɿϨίʔυऩूɺΠεΩʔɾϫΠϯɺಡॻʢٕज़ॻɾ4'FUDʣ
ࣗݾհ w ηΩϡϦςΟϕϯμʔͰηΩϡϦςΟίϯαϧλϯτ w ސ٬ͷʮηΩϡϦςΟࠔͬͨʯΛղܾ͢Δ෦ॺ w μϯαʔ׆ಈʴ8FCܥ։ൃʴηΩϡϦςΟϕϯμʔ w झຯɿϨίʔυऩूɺΠεΩʔɾϫΠϯɺಡॻʢٕज़ॻɾ4'FUDʣ
ڴҖϞσϦϯάྺ w ڴҖϞσϦϯάϫʔΫγϣοϓJO5PLZPʢʣ w 5.$5PLZP.FFUVQY;"/4*/ʢʣ w 5ISFBU.PEFMJOH/JHIU4QFDJBM4FTTJPOʢʣ w ۀʹ͓͚Δઃܭੳ
ڴҖϞσϦϯά֓ཁ ڴҖϞσϦϯάରબఆ తɾείʔϓ໌֬Խ Ϟσϧߏங w %'%ʢ%BUB'MPX %JBHSBNʣ࡞
w ৴པڥքఆٛ w ڴҖੳϞσϧͷબఆ ڴҖϞσϦϯά࣮ࢪ w ڴҖΛϦετΞοϓ w ڴҖͷϦεΫධՁ w ڴҖʹର͢Δରࡦݕ౼ ʹର͢ΔৼΓฦΓɾϑΟ ʔυόοΫ w ্ख࣮͘ߦͰ͖͍͔ͯͨʁ w ࣍ճʹ͚ͯͷվળ
ڴҖϞσϦϯάʹ͓͚Δࣦഊͱʁ wࣦഊΛఆٛ͢ΔͨΊʹ·ͣతΛ໌֬Խ͢Δඞཁ wˠత͕ୡͰ͖ͳ͔ͬͨʹࣦഊͱఆٛՄೳ wڴҖϞσϦϯάͷతʁ wγεςϜʹର͢ΔڴҖͷಛఆɺηΩϡΞԽ wηΩϡϦςΟจԽͷৢ wνʔϜϏϧσΟϯά ˞తʹਖ਼ղͳ͘ɺ՝ɾഎܠʹΑͬͯҟͳΔ
ڴҖϞσϦϯάͷཧܥɿ॥ ڴҖϞσϦϯά ৼฦΓ ੳ ධՁ ରࡦ ࣮
ڴҖϞσϦϯάͷཧܥɿ॥ ਓࡐɾεΩϧ ͷ॥ ϓϩηεͷ ॥ ڴҖ ϞσϦϯά ܧଓతվળ ࣝͷ॥ ࢿ࢈ͷ॥
Ձͷ॥ w ࣝڞ༗ w ଟ༷ͳࢹ w ೳྗ։ൃ w ܧଓత࣮ࢪ w ϑΟʔυόοΫ w ϓϩηεվળ w ϏδωεՁ w ϦεΫݮ w ސ٬৴པ w ࢿ࢈࠶ར༻ w πʔϧਐԽ w ίʔυࢿ࢈ w φϨοδϕʔε w ڴҖใ w ϕεϓϥ ʢ΅͘ͷ͔Μ͕͍͖͑ͨ͞ΐ͏ͷʣڴҖϞσϦϯά
ڴҖϞσϦϯάʹ͓͚Δࣦഊ w ڴҖϞσϦϯάͷ݁Ռ͕໌จԽ͞Εͳ͍ɺಛఆͷνʔϜʹཹ·Δ w ৫શମͷφϨοδͱͳΒͳ͍ w ಉ͡ڴҖ͕ݟ͔ͭͬͯաڈͷڭ܇͕׆͔͞Εͳ͍ʢԿʮ࠶ൃݟʯ͢Δʣ w ڴҖಈϕετϓϥΫςΟεΛ৽ͨʹऔΓೖΕͳ͍ w
ڴҖϞσϦϯάޙʹڴҖϞσϧΛอଘͤͣɺকདྷతͳࢀরෆՄ ࣝ໘ ڴҖ ϞσϦϯά ܧଓతվળ ࣝͷ॥
ڴҖϞσϦϯάʹ͓͚Δࣦഊ w ಛఆͷʮηΩϡϦςΟઐՈʯͷҙݟʹϞσϦϯά͕ࠨӈ͞Εͯ͠·͏ w φϨοδҠసɺτϨʔχϯάෆʹΑΓڴҖϞσϦϯά͕Ͱ͖Δਓࡐ͕ҭͨͳ͍ w ։ൃνʔϜͱηΩϡϦςΟνʔϜͷڠྗෆͰޓ͍ͷྖҬͷཧղ͕ਂ·Βͳ͍ w ಉ࣭తͳνʔϜʹΑΔ׆ಈͰಛఆλΠϓͷڴҖʹͷΈϑΥʔΧε͞Εͯ͠·͏ ਓࡐɾεΩϧ໘
ਓࡐɾεΩϧ ͷ॥ ڴҖ ϞσϦϯά ܧଓతվળ
ڴҖϞσϦϯάʹ͓͚Δࣦഊ w ڴҖϞσϦϯάΛ௨ͯ͡ಛఆ͞ΕͨڴҖ͕ίʔυϕʔεʹө͞Εͳ͍ w ڴҖϞσϦϯάπʔϧʹґଘ͠ίϯςΩετཧղυϝΠϯࣝɺϏδωεՁʹجͮ͘அͷܽ w ڞ௨ͷηΩϡϦςΟύλʔϯ͕࠶ར༻͞Εͣɺॏෳͨ͠ରࡦͷ࣮ w ٕज़తෛ࠴ͷແࢹ
w ϨΨγʔγεςϜαʔυύʔςΟιϑτɺݟෆͷྖҬ͕ର͔Βআ֎͞Εଓ͚Δ πʔϧɾࢿ࢈໘ ڴҖ ϞσϦϯά ܧଓతվળ ࢿ࢈ͷ॥
ڴҖϞσϦϯάʹ͓͚Δࣦഊ w ࣮ࢪλΠϛϯάͷ w ઃܭྃޙϦϦʔεલʹڴҖϞσϦϯάΛߦ͍ɺରࡦ͕࣮࣭తʹࠔͳ߹ w ίϯϓϥཁ݅Λຬ͚ͨͩ͢ͷʮνΣοΫϘοΫεʯతͳ࣮ࢪͰɺ࣮࣭తͳՁΛੜ·ͳ ͍ w ڴҖϞσϧͷϑΟʔυόοΫɺվળ͕ߦΘΕͳ͍
w ࣮͞Εͨରࡦͷ༗ޮੑݕূ͕ߦΘΕͣڴҖϞσϧͷਫ਼্͕ͳ͍ w ׆ಈ͕ܧଓతʹߦΘΕͣɺಛఆ࣌ͷΈͷݶఆతͳ׆ಈʹཹ·Δ ϓϩηε໘ ϓϩηεͷ ॥ ڴҖ ϞσϦϯά ܧଓతվળ
ڴҖϞσϦϯάʹ͓͚Δࣦഊ w ڴҖϞσϦϯάͷՁ͕ܦӦͷ্Ґʹཧղ͞Εͳ͍ w ٕज़తϦεΫͱϏδωεϦεΫͷదͳ݁ͼ͖͕ͭͳ͘ɺ༏ઌॱҐΛݟޡΔ w ڴҖϞσϦϯά͕ʮίετʯͱͯ͠ͷΈೝࣝ͞ΕɺޮՌɾՁ͕ධՁ͞Εͳ͍ w ڴҖϞσϦϯάͷ݁Ռͱͯ͠ಋೖ͞Εͨରࡦ͕ސ٬Ձࢢ༏Ґੑʹ݁ͼ͔ͭͳ ͍
w ʮՁͷ॥ʯ͕ͳ͞Εͳ͍͜ͱʹΑͬͯͦͷଞશͯͷ॥ʹର͢ΔѱӨڹΛٴ ΅͢Մೳੑ Ձ໘ ڴҖ ϞσϦϯά ܧଓతվળ Ձͷ॥
ڴҖϞσϦϯάʹ͓͚Δࣦഊ w ʮखஈʯ͕ʮతʯͱͳͬͯ͠·͏ w త͕໌֬Խ͞Εͳ͍··ڴҖϞσϦϯάΛߦͳͬͯ͠·͏ w Ϟσϧߏஙʹ͓͚Δཧղෆɾ࿅ෆ w վળͷϧʔϓ͕ճΒͳ͍ ڴҖϞσϦϯάࣗମ
ڴҖϞσϦϯά ৼฦΓ ੳ ධՁ ରࡦ ࣮
·ͱΊ γεςϜηΩϡΞԽͱڴҖϞσϧվળͷೋॏཐટ γεςϜηΩϡΞԽ ڴҖϞσϧվળ
·ͱΊ γεςϜηΩϡΞԽͱڴҖϞσϧվળͷೋॏཐટ γεςϜηΩϡΞԽ ڴҖϞσϧվળ ͓͚֮͑ͯʂ ͜ͷυϦϧϞσϧɺ͜ͷӉڴҖʹ෩݀Λ։͚Δɻ ͦͷ݀ޙ͔Βଓ͘ऀͷಓͱͳΔɻ ʢڴҖʹʣΕ͍ͯͬͨऀͷئ͍ͱޙ͔Βଓ͘ऀͷرʂ ೋͭͷ͍Λೋॏཐટʹ৫ΓࠐΜͰʂ ໌ͱଓ͘ಓΛ۷Δʂ
ͦΕ͕ఱݩಥഁڴҖʂ ͦΕ͕άϨϯϥΨϯϞσϦϯάʂ ԶͷυϦϧϞσϦϯάʂఱ҆શΛ࡞ΔυϦϧϞσϦϯάͩʂʂ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ