Forskere fra virksomhederne Claroty og JFrog har offentliggjort resultaterne af sikkerhedsauditet af BusyBox-pakken, der er bredt anvendt i indlejrede enheder og tilbyder et s\u00e6t standard UNIX-v\u00e6rkt\u00f8jer samlet i en enkelt eksekverbar fil. Under gennemgangen blev der identificeret 14 s\u00e5rbarheder, som allerede er blevet rettet i augustudgaven af BusyBox 1.34. N\u00e6sten alle problemer er ufarlige og tvivlsomme i forhold til deres anvendelse i reelle angreb, da de kr\u00e6ver k\u00f8rsel af v\u00e6rkt\u00f8jer med modtagne argumenter udefra. <\/p>\n
En specifik s\u00e5rbarhed, CVE-2021-42374, skiller sig ud, da den muligg\u00f8r tjenesten\u00e6gtelse ved behandling af en specielt formateret komprimeret fil med v\u00e6rkt\u00f8jet unlzma; hvis der er bygget med indstillingen CONFIG_FEATURE_SEAMLESS_LZMA, ogs\u00e5 via andre BusyBox-komponenter, inklusiv tar, unzip, rpm, dpkg, lzma og man. <\/p>\n
S\u00e5rbarhederne CVE-2021-42373, CVE-2021-42375, CVE-2021-42376 og CVE-2021-42377 tillader tjenesten\u00e6gtelse, men kr\u00e6ver, at v\u00e6rkt\u00f8jerne man, ash og hush k\u00f8res med parametre angivet af angriberen. S\u00e5rbarhederne fra CVE-2021-42378 til CVE-2021-42386 ber\u00f8rer awk-v\u00e6rkt\u00f8jet og kan potentielt f\u00f8re til eksekvering af kode, men for dette skal angriberen opn\u00e5, at en bestemt skabelon udf\u00f8res i awk (det er n\u00f8dvendigt at k\u00f8re awk med data modtaget fra angriberen som den f\u00f8rste argument p\u00e5 kommandolinjen). <\/p>\n
Derudover kan vi ogs\u00e5 n\u00e6vne en s\u00e5rbarhed (CVE-2021-43523) i bibliotekerne uclibc og uclibc-ng, som vedr\u00f8rer, at der ikke udf\u00f8res kontrol og rensning af dom\u00e6nenavnet, der returneres af DNS-serveren, n\u00e5r man kalder funktionerne gethostbyname(), getaddrinfo(), gethostbyaddr() og getnameinfo(). For eksempel kan en manipulativ DNS-server returnere v\u00e6rter som «<script>alert(‘xss’)<\\\/script>.attacker.com» i svar p\u00e5 en bestemt opl\u00f8sningforesp\u00f8rgsel, og disse vil blive returneret u\u00e6ndret til et program, som uden rensning kan vise dem i webgr\u00e6nsefladen. Problemet er blevet l\u00f8st i uclibc-ng version 1.0.39 ved at tilf\u00f8je kode til at kontrollere gyldigheden af de returnerede. domenenavne<\/a>, implementeret efter m\u00f8nster fra Glibc. \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\udd47Sikkerhedsanalysen af BusyBox-pakken afd\u00e6kkede 14 ikke-kritiske s\u00e5rbarheder | ProHoster","description":"Forskere fra virksomhederne Claroty og JFrog har 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Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"