{"id":1007,"date":"2024-11-10T05:58:53","date_gmt":"2024-11-09T20:58:53","guid":{"rendered":"https:\/\/emeth.jp\/diary\/?p=1007"},"modified":"2024-11-10T07:55:25","modified_gmt":"2024-11-09T22:55:25","slug":"automotive-ctf-2024-writeup","status":"publish","type":"post","link":"https:\/\/emeth.jp\/diary\/2024\/11\/automotive-ctf-2024-writeup\/","title":{"rendered":"Automotive CTF 2024\u30b0\u30ed\u30fc\u30d0\u30eb\u6c7a\u52dd\u306b\u53c2\u52a0\u3057\u305f\uff06writeup"},"content":{"rendered":"\n

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Automotive CTF 2024\u6c7a\u52dd<\/h3>\n\n\n\n

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Automotive CTF 2024\u306e\u30b9\u30b3\u30a2\u30dc\u30fc\u30c9<\/figcaption><\/figure>\n<\/div>\n\n\n

\u611f\u60f3<\/h3>\n\n\n\n

\u4e88\u9078\u304b\u3089\u65e5\u672c\u6c7a\u52dd\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u6c7a\u52dd\u307e\u3067\u53c2\u52a0\u3067\u304d\u3066\u3001\u3068\u3066\u3082\u697d\u3057\u304b\u3063\u305f\u3002\u30aa\u30f3\u30b5\u30a4\u30c8\u306eCTF\u306b\u53c2\u52a0\u3059\u308b\uff08\u3067\u304d\u308b\uff09\u3053\u3068\u306f\u3042\u307e\u308a\u306a\u3044\u306e\u3067\u3044\u3044\u7d4c\u9a13\u306b\u3082\u306a\u3063\u305f\u3002\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u4e3b\u4f53\u306eCTF\u3068\u3044\u3046\u306e\u3082\u73cd\u3057\u304f\u3066\u3088\u304b\u3063\u305f\u3002\u8a98\u3063\u3066\u304f\u308c\u305f\u30c1\u30fc\u30e0\u30ea\u30fc\u30c0\u30fc\u306b\u306f\u611f\u8b1d\u3002CTF\u3092\u958b\u50ac\u3057\u3066\u304f\u308c\u305f\u904b\u55b6\u306b\u3082\u611f\u8b1d\u3002<\/p>\n\n\n\n

\u305b\u3063\u304b\u304f\u5b66\u3093\u3060\u81ea\u52d5\u8eca\u95a2\u4fc2\u306e\u77e5\u8b58\u3092\u3053\u3053\u3060\u3051\u3067\u7d42\u308f\u3089\u305b\u308b\u306e\u306f\u3082\u3063\u305f\u3044\u306a\u3044\u306e\u3067\u3001\u4eca\u5f8c\u3082\u3053\u3046\u3044\u3046\u306e\u306b\u53c2\u52a0\u3059\u308b\u6a5f\u4f1a\u304c\u3042\u308c\u3070\u53c2\u52a0\u3057\u3066\u3044\u304d\u305f\u3044\u3002\u52c9\u5f37\u4f1a\u3068\u304b\u3084\u3063\u3066\u88fe\u91ce\u3092\u5e83\u3052\u308b\u306e\u3082\u3044\u3044\u306d\u3002\u3042\u3068\u306f\u3044\u308d\u3044\u308d\u5b66\u7fd2\u3057\u305f\u308a\u3059\u308b\u306e\u306bRAMN\u3092\u4f5c\u308a\u305f\u3044\u3002<\/p>\n\n\n\n

Writeup<\/h2>\n\n\n\n

Misc \/ OSINT [200pt]<\/h3>\n\n\n\n

\u30b9\u30d4\u30fc\u30c9\u30e1\u30fc\u30bf\u30fc\u304c\u642d\u8f09\u3055\u308c\u3066\u3044\u305f\u8eca\u7a2e\u3092\u5f53\u3066\u308b\u554f\u984c\u3002\u30b9\u30d4\u30fc\u30c9\u30e1\u30fc\u30bf\u30fc\u306e\u88cf\u306e\u5199\u771f\u306f\u3053\u3093\u306a\u611f\u3058\u3002<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

\u300cK1054 speedmeter\u300d\u3067\u30b0\u30b0\u308b\u3068Mazda CX-3\u3068\u51fa\u3066\u304f\u308b\u304c\u3053\u308c\u306f\u9593\u9055\u3044\u3002\u4ed6\u306bMazda 2\u3068\u3044\u3046\u306e\u3082\u51fa\u3066\u304d\u305f\u306e\u3067\u3053\u308c\u3092\u5165\u308c\u305f\u3089\u6b63\u89e3\u3002<\/p>\n\n\n\n

Flag: bh{Mazda 2}<\/code><\/p>\n\n\n\n

RAMN \/ [D] Follow Me [100pt]<\/h3>\n\n\n\n

ECU D\u306eExpansion\u306b\u3042\u308bLED\u306e\u5236\u5fa1\u3092SPI\u3067\u3084\u3063\u3066\u3044\u308b\u306e\u3067\u898b\u3066\u307f\u308d\u3068\u3044\u3046\u554f\u984c\u3002\u3069\u306e\u30d4\u30f3\u304c\u4f7f\u308f\u308c\u3066\u308b\u304b\u306f\u308f\u304b\u3089\u306a\u3044\u3002\u3068\u3044\u3046\u308f\u3051\u3067\u30ed\u30b8\u30a2\u30ca\u306e\u51fa\u756a\u3002Expansion\u30bd\u30b1\u30c3\u30c8\u306e\u30d4\u30f3\u3092\u7247\u3063\u7aef\u304b\u3089\u8a66\u3057\u3066\u3044\u304f\u3068\u5b9a\u671f\u7684\u306a\u4fe1\u53f7\u3092\u51fa\u3057\u3066\u3044\u308b\u3082\u306e\u3068\u3061\u3087\u3063\u3068\u4e71\u308c\u305f\u4fe1\u53f7\u3092\u51fa\u3057\u3066\u3044\u308b\u3082\u306e\u304c\u898b\u3064\u304b\u308b\u3002\u305d\u308c\u3089\u3092SCK\u3068MOSI\u3068\u3057\u3066\u30ed\u30b8\u30a2\u30ca\u3067\u89e3\u91c8\u3055\u305b\u308b\u3068\u30d5\u30e9\u30b0\u304c\u51fa\u3066\u304d\u305f\u3002<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Flag: bh{TREE_FORMS_WIND}<\/code><\/p>\n\n\n\n

\u5f53\u521d\u3001\u3053\u308c\u3092\u4f55\u5ea6\u5165\u308c\u3066\u3082Incorrect\u3060\u3063\u305f\u3002CTFd\u306e\u30d5\u30e9\u30b0\u306e\u8a2d\u5b9a\u304c\u9593\u9055\u3063\u3066\u3044\u305f\u3089\u3057\u304f\u3001\u4fee\u6b63\u3055\u308c\u3066\u300c\u3082\u3046\u4e00\u5ea6\u5165\u308c\u3066\u307f\u3066\u300d\u3068\u30a2\u30ca\u30a6\u30f3\u30b9\u304c\u3042\u3063\u305f\u306e\u3067\u5165\u308c\u305f\u3089\u901a\u3063\u305f\u3002\u30c6\u30b9\u30c8\u3057\u3066\u304f\u308c\u3002<\/p>\n\n\n\n

RAMN \/ [D] Forgotten Field [400pt]<\/h3>\n\n\n\n

\u89e3\u3051\u306a\u304b\u3063\u305f\u554f\u984c\u3002CAN ID 0x607\u3092\u3088\u304f\u898b\u308d\u3068\u306e\u3053\u3068\u3002<\/p>\n\n\n\n

candump\u3067\u898b\u308b\u3068\u4f55\u304b\u30d5\u30e9\u30b0\u304c\u3042\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u304c\u3001\u305d\u3053\u306b\u3042\u308b\u3088\u3046\u306b\u3053\u308c\u306f\u507d\u306e\u30d5\u30e9\u30b0\u3002<\/p>\n\n\n\n

 (1729536958.126117)  can0  607   [3]  62 67 18                  'bg.'\n (1729536958.126397)  can0  607   [3]  68 10 99                  'h..'\n (1729536958.126422)  can0  607   [3]  7B 46 F6                  '{F.'\n (1729536958.126684)  can0  607   [3]  6C 2F E3                  'l\/.'\n (1729536958.126772)  can0  607   [3]  6D 7D 06                  'm}.'\n (1729536958.127402)  can0  607   [3]  61 66 56                  'afV'\n (1729536958.127595)  can0  607   [3]  6F 67 09                  'og.'\n (1729536958.127606)  can0  607   [3]  5F 72 CC                  '_r.'\n (1729536958.127614)  can0  607   [3]  6E 0A 1B                  'n..'\n (1729536958.127623)  can0  607   [3]  6F 67 09                  'og.'\n (1729536958.127632)  can0  607   [3]  74 42 7F                  'tB.'\n (1729536958.128603)  can0  607   [3]  5F 2C 42                  '_,B'\n (1729536958.128671)  can0  607   [3]  68 78 5D                  'hx]'\n (1729536958.128680)  can0  607   [3]  65 73 28                  'es('\n (1729536958.128691)  can0  607   [3]  72 16 32                  'r.2'\n (1729536958.128702)  can0  607   [3]  65 31 E8                  'e1.'\n (1729536958.128718)  can0  607   [3]  21 65 25                  '!e%'\n (1729536958.128728)  can0  607   [3]  7D 28 FE                  '}(.'<\/code><\/pre>\n\n\n\n
Wikipedia\u306eCAN\u306e\u9805\u76ee<\/a>\u3092\u898b\u308b\u3068\u3001CAN\u306e\u30d5\u30ec\u30fc\u30e0\u306b\u306fCRC\u304c\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308b\u304c\u3001\u3053\u308c\u306f\u4e0a\u8a18\u306ecandump\u306b\u306f\u51fa\u3066\u3053\u306a\u3044\u3002<\/p>\n\n\n\n
\"\"<\/a>
CAN\u30d5\u30ec\u30fc\u30e0\uff08Wikipedia<\/a>\u3088\u308a\u5f15\u7528\uff09<\/figcaption><\/figure>\n\n\n\n
CAN\u30a2\u30c0\u30d7\u30bf\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c7\u30d0\u30a4\u30b9\u3068\u3057\u3066\u8a8d\u8b58\u3055\u308c\u3066\u3044\u308b\u306e\u3067tcpdump\u3067\u898b\u3066\u307f\u308b\u3082CRC\u30d5\u30a3\u30fc\u30eb\u30c9\u306f0\u306b\u306a\u3063\u3066\u3044\u305f\u3002<\/p>\n\n\n
\n
\"\"<\/a><\/figure>\n<\/div>\n\n\n
PC\u4e0a\u3067\u306f\u3053\u308c\u3088\u308a\u4e0b\u306e\u30ec\u30a4\u30e4\u3092\u898b\u308b\u624b\u6bb5\u304c\u306a\u304f\u3001\u30ed\u30b8\u30a2\u30ca\u3067CAN\u30d0\u30b9\u3092\u898b\u3066\u307f\u308b\u3053\u3068\u306b\u3057\u305f\u3002\u3057\u304b\u3057\u3001CAN\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u3042\u308b\u7a0b\u5ea6\u898b\u3089\u308c\u308b\u3088\u3046\u306b\u306f\u306a\u3063\u305f\u3082\u306e\u306e\u3001ID 0x607\u4ee5\u5916\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u591a\u304fID 0x607\u3092\u3046\u307e\u304f\u629c\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u307e\u307e\u7d42\u4e86\u3002<\/p>\n\n\n\n
\u4f5c\u554f\u8005\u3068\u8a71\u3092\u3059\u308b\u6a5f\u4f1a\u304c\u3042\u3063\u305f\u306e\u3067\u805e\u3044\u3066\u307f\u305f\u3068\u3053\u308d\u3001\u4ed6\u306eECU\u3092\u6b62\u3081\u308c\u3070ID 0x607\u3060\u3051\u898b\u3089\u308c\u305f\u3089\u3057\u3044\u3002\u305d\u306e\u767a\u60f3\u306f\u306a\u304b\u3063\u305f\u3002<\/p>\n\n\n\n
RAMN \/ [A\/C] Ramen Clicker [1000pt]<\/h3>\n\n\n\n
\u30b9\u30a4\u30c3\u30c1\u3092\u62bc\u3059\u3068\u30af\u30ea\u30c3\u30af\u6570\u304c1\u5897\u3048\u308b\u30020x9000\u4ee5\u4e0a\u3092\u76ee\u6307\u305d\u3046\uff01\u7121\u7406\uff01<\/p>\n\n\n\n
\u30b9\u30a4\u30c3\u30c1\u3092\u62bc\u3057\u305f\u3068\u304d\u306bCAN ID 0x45\u304c\u51fa\u308b\u304c\u3001\u305d\u308c\u3092\u305d\u306e\u307e\u307e\u9001\u3063\u3066\u3082\u30c1\u30fc\u30c8\u306f\u30c0\u30e1\u3060\u3068\u6012\u3089\u308c\u3066\u6700\u521d\u304b\u3089\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3002candump\u3092\u773a\u3081\u3066\u3044\u308b\u30680x45\u306e\u5468\u56f2\u306b\u4ed6\u306eID\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3082\u6d41\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u3053\u308c\u3082\u30bb\u30c3\u30c8\u304b\u3068\u601d\u3044\u307e\u3068\u3081\u3066\u30ea\u30d7\u30ec\u30a4\u3057\u3066\u307f\u3066\u3082\u30c0\u30e1\u3002<\/p>\n\n\n\n
\u7d50\u5c40\u7cf8\u53e3\u3092\u3064\u304b\u3081\u306a\u3044\u307e\u307e\u7d42\u4e86\u3002\u89e3\u3051\u305f\u306e\u306f\u512a\u52dd\u3057\u305f\u30c1\u30fc\u30e0\u3060\u3051\u3060\u3063\u305f\u3089\u3057\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u306e\u30a8\u30f3\u30c8\u30ea\u3067\u30b0\u30ed\u30fc\u30d0\u30eb\u6c7a\u52dd\u9032\u51fa\u306e\u65e8\u3092\u66f8\u3044\u305f\u304c\u3001\u3053\u306e\u5ea6\u30c7\u30c8\u30ed\u30a4\u30c8\u3067\u958b\u50ac\u3055\u308c\u305fAutomotive CTF 2024\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u6c7a\u52dd\u306b\u53c2\u52a0\u3057\u3066\u304d\u305f\u3002\u7d50\u679c\u306f4\u4f4d\u3060\u3063\u305f\u3002<\/p>\n","protected":false},"author":1,"featured_media":1008,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"yes","footnotes":""},"categories":[14],"tags":[8],"class_list":["post-1007","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ctf","tag-ctf"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/posts\/1007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/comments?post=1007"}],"version-history":[{"count":9,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/posts\/1007\/revisions"}],"predecessor-version":[{"id":1033,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/posts\/1007\/revisions\/1033"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/media\/1008"}],"wp:attachment":[{"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/media?parent=1007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/categories?post=1007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/emeth.jp\/diary\/wp-json\/wp\/v2\/tags?post=1007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}