{"id":102257,"date":"2021-11-09T21:36:46","date_gmt":"2021-11-09T19:36:46","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej"},"modified":"2021-11-09T21:36:46","modified_gmt":"2021-11-09T19:36:46","slug":"analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej","title":{"rendered":"A BusyBox csomag biztons\u00e1gi elemz\u00e9se 14 l\u00e9nyegtelen sebezhet\u0151s\u00e9get t\u00e1rt fel","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Claroty \u00e9s a JFrog kutat\u00f3i k\u00f6zz\u00e9tett\u00e9k a BusyBox csomag biztons\u00e1gi auditj\u00e1nak eredm\u00e9nyeit, amelyet sz\u00e9les k\u00f6rben haszn\u00e1lnak be\u00e1gyazott eszk\u00f6z\u00f6kben, \u00e9s amely egyetlen v\u00e9grehajthat\u00f3 f\u00e1jl form\u00e1j\u00e1ban k\u00edn\u00e1lja a standard UNIX seg\u00e9dprogramok k\u00e9szlet\u00e9t. Az ellen\u0151rz\u00e9s sor\u00e1n 14 sebezhet\u0151s\u00e9get azonos\u00edtottak, amelyeket m\u00e1r orvosoltak a BusyBox 1.34 augusztusi kiad\u00e1s\u00e1ban. Szinte minden probl\u00e9ma nem vesz\u00e9lyes, \u00e9s k\u00e9ts\u00e9ges a val\u00f3s t\u00e1mad\u00e1sokban val\u00f3 alkalmaz\u00e1s szempontj\u00e1b\u00f3l, mivel k\u00fcls\u0151 \u00e9rt\u00e9kekkel kell futtatni az eszk\u00f6z\u00f6ket. <\/p>\n

K\u00fcl\u00f6n\u00f6sen kiemelkedik a CVE-2021-42374 sebezhet\u0151s\u00e9g, amely lehet\u0151v\u00e9 teszi a szolg\u00e1ltat\u00e1smegtagad\u00e1st egy speci\u00e1lisan l\u00e9trehozott t\u00f6m\u00f6r\u00edtett f\u00e1jl unraveledz\u00e9se sor\u00e1n az unlzma seg\u00e9dprogram \u00e1ltal, \u00e9s a CONFIG_FEATURE_SEAMLESS_LZMA opci\u00f3k mellett b\u00e1rmely m\u00e1s BusyBox komponenst is \u00e9rint, bele\u00e9rtve a tar-t, unzip-et, rpm-t, dpkg-t, lzma-t \u00e9s man-t. <\/p>\n

A CVE-2021-42373, CVE-2021-42375, CVE-2021-42376 \u00e9s CVE-2021-42377 sebezhet\u0151s\u00e9gek szolg\u00e1ltat\u00e1smegtagad\u00e1st okozhatnak, de a man, ash \u00e9s hush seg\u00e9dprogramokat t\u00e1mad\u00f3 \u00e1ltal megadott param\u00e9terekkel kell futtatni. A CVE-2021-42378-t\u00f3l CVE-2021-42386-ig terjed\u0151 sebezhet\u0151s\u00e9gek az awk seg\u00e9dprogramot \u00e9rintik, \u00e9s potenci\u00e1lisan k\u00f3d v\u00e9grehajt\u00e1s\u00e1hoz vezethetnek, de ehhez a t\u00e1mad\u00f3nak el kell \u00e9rnie, hogy az awk egy adott mint\u00e1t hajtson v\u00e9gre (az awk-t a parancssor els\u0151 argumentum\u00e1ban a t\u00e1mad\u00f3t\u00f3l sz\u00e1rmaz\u00f3 adatok \u00e1tad\u00e1s\u00e1val kell futtatni). <\/p>\n

Tov\u00e1bb\u00e1 kiemelend\u0151 a (CVE-2021-43523) s\u00e9r\u00fcl\u00e9kenys\u00e9g az uclibc \u00e9s uclibc-ng k\u00f6nyvt\u00e1rakban, amely kapcsol\u00f3dik ahhoz, hogy a gethostbyname(), getaddrinfo(), gethostbyaddr() \u00e9s getnameinfo() funkci\u00f3kn\u00e1l nem t\u00f6rt\u00e9nik ellen\u0151rz\u00e9s \u00e9s tiszt\u00edt\u00e1s a DNS-szervert\u0151l vissza\u00e9rkez\u0151 domain n\u00e9vvel kapcsolatban. P\u00e9ld\u00e1ul egy bizonyos lek\u00e9rdez\u00e9sre a t\u00e1mad\u00f3 \u00e1ltal ellen\u0151rz\u00f6tt DNS-szerver olyan hosztokat adhat vissza, mint «<script>alert(‘xss’)<\\\/script>.attacker.com», \u00e9s ezek v\u00e1ltozatlan form\u00e1ban ker\u00fclnek visszaad\u00e1sra egy olyan program sz\u00e1m\u00e1ra, amely tiszt\u00edt\u00e1s n\u00e9lk\u00fcl megjelen\u00edtheti azokat a webes fel\u00fclet\u00e9n. A probl\u00e9ma megold\u00e1sra ker\u00fclt az uclibc-ng 1.0.39 verzi\u00f3j\u00e1ban, amikor egy k\u00f3dot adtak hozz\u00e1 a vissza\u00e9rkez\u0151 adatok \u00e9rv\u00e9nyess\u00e9g\u00e9nek ellen\u0151rz\u00e9s\u00e9re. domain nevekkel<\/a>, amely a Glibc-hez hasonl\u00f3 elven lett megval\u00f3s\u00edtva.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Claroty \u0438 JFrog \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0430\u0443\u0434\u0438\u0442\u0430 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 BusyBox, \u0448\u0438\u0440\u043e\u043a\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432\u043e \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u0438 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043d\u0430\u0431\u043e\u0440 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0445 \u0443\u0442\u0438\u043b\u0438\u0442 UNIX, \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0432 \u0432\u0438\u0434\u0435 \u0435\u0434\u0438\u043d\u043e\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u0430. \u0412 \u0445\u043e\u0434\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 14 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0443\u0436\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u0430\u0432\u0433\u0443\u0441\u0442\u043e\u0432\u0441\u043a\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 BusyBox 1.34. \u041f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043d\u0435\u043e\u043f\u0430\u0441\u043d\u044b \u0438 \u0441\u043e\u043c\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0445 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102257","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47A BusyBox csomag biztons\u00e1gi elemz\u00e9se 14 l\u00e9nyegtelen sebezhet\u0151s\u00e9get t\u00e1rt fel | ProHoster","description":"A Claroty \u00e9s a JFrog kutat\u00f3i k\u00f6zz\u00e9tett\u00e9k a BusyBox csomag biztons\u00e1gi auditj\u00e1nak eredm\u00e9nyeit, amelyet sz\u00e9les k\u00f6rben 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