{"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\/fr\/blog\/news\/analiz-bezopasnosti-paketa-busybox-vyyavil-14-nesushhestvennyh-uyazvimostej","title":{"rendered":"L'analyse de s\u00e9curit\u00e9 du paquet BusyBox a r\u00e9v\u00e9l\u00e9 14 vuln\u00e9rabilit\u00e9s non significatives.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Des chercheurs des entreprises Claroty et JFrog ont publi\u00e9 les r\u00e9sultats d'un audit de s\u00e9curit\u00e9 du package BusyBox, largement utilis\u00e9 dans les dispositifs embarqu\u00e9s et offrant un ensemble d'outils UNIX standards sous la forme d'un seul ex\u00e9cutable. Au cours de l'\u00e9valuation, 14 vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 identifi\u00e9es, qui ont d\u00e9j\u00e0 \u00e9t\u00e9 corrig\u00e9es dans la version d'ao\u00fbt de BusyBox 1.34. Presque tous les probl\u00e8mes sont b\u00e9nins et peu probables d'\u00eatre exploit\u00e9s dans des attaques r\u00e9elles, car ils n\u00e9cessitent l'ex\u00e9cution d'outils avec des arguments fournis de l'ext\u00e9rieur. <\/p>\n

Une vuln\u00e9rabilit\u00e9 distincte, CVE-2021-42374, permet de provoquer un d\u00e9ni de service lors du traitement d'un fichier compress\u00e9 sp\u00e9cialement con\u00e7u par l'outil unlzma, et en cas de compilation avec l'option CONFIG_FEATURE_SEAMLESS_LZMA, \u00e9galement par d'autres composants de BusyBox, y compris tar, unzip, rpm, dpkg, lzma et man. <\/p>\n

Les vuln\u00e9rabilit\u00e9s CVE-2021-42373, CVE-2021-42375, CVE-2021-42376 et CVE-2021-42377 permettent de provoquer un d\u00e9ni de service, mais n\u00e9cessitent l'ex\u00e9cution des outils man, ash et hush avec des param\u00e8tres d\u00e9finis par l'attaquant. Les vuln\u00e9rabilit\u00e9s de CVE-2021-42378 \u00e0 CVE-2021-42386 concernent l'outil awk et pourraient potentiellement permettre l'ex\u00e9cution de code, mais l'attaquant doit parvenir \u00e0 l'ex\u00e9cution d'un certain mod\u00e8le dans awk (il est n\u00e9cessaire d'ex\u00e9cuter awk en transmettant en premier argument des donn\u00e9es obtenues de l'attaquant). <\/p>\n

On peut \u00e9galement noter la vuln\u00e9rabilit\u00e9 (CVE-2021-43523) dans les biblioth\u00e8ques uclibc et uclibc-ng, li\u00e9e au fait que lors de l'appel des fonctions gethostbyname(), getaddrinfo(), gethostbyaddr() et getnameinfo(), aucune v\u00e9rification ou nettoyage du nom de domaine renvoy\u00e9 par le serveur DNS n'est effectu\u00e9. Par exemple, en r\u00e9ponse \u00e0 une certaine requ\u00eate de r\u00e9solution, un serveur DNS contr\u00f4l\u00e9 par un attaquant peut renvoyer des h\u00f4tes de type «<script>alert(‘xss’)<\\\/script>.attacker.com», qui seront renvoy\u00e9s tels quels \u00e0 un programme quelconque, qui, sans nettoyage, pourrait les afficher dans son interface web. Le probl\u00e8me a \u00e9t\u00e9 r\u00e9solu dans la version uclibc-ng 1.0.39 par l'ajout de code pour v\u00e9rifier la validit\u00e9 des donn\u00e9es renvoy\u00e9es. complets<\/a>, impl\u00e9ment\u00e9 par analogie avec Glibc.
\n
Source : 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 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