{"id":113876,"date":"2024-02-26T22:02:49","date_gmt":"2024-02-26T20:02:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek"},"modified":"2024-02-26T22:02:49","modified_gmt":"2024-02-26T20:02:49","slug":"uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek","title":{"rendered":"Udgivelse af CAD-software KiCad 8.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>I modulet ksmbd, der tilbyder en indbygget Linux-kerneimplementering af en filserver baseret p\u00e5 SMB-protokollen, er der blevet identificeret to s\u00e5rbarheder, der muligg\u00f8r fjernudf\u00f8relse af angrebskode med kernerettigheder eller adgang til kernehukommelsens indhold p\u00e5 systemer med den aktiverede ksmbd-modul. Problemerne opst\u00e5r fra kerne 5.15, som indeholder ksmbd-modulet. S\u00e5rbarhederne er blevet rettet i kernopdateringerne 6.7.2, 6.6.14, 6.1.75 og 5.15.145. Opdateringer i distributioner kan f\u00f8lges p\u00e5 f\u00f8lgende sider: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Arch.     <\/p>\n<p>Den f\u00f8rste s\u00e5rbarhed (CVE-2024-26592) kan f\u00f8re til udf\u00f8relse af angrebskode med kernerettigheder ved at sende s\u00e6rligt udformede, ikke-autentificerede TCP-anmodninger til <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2885\">server<\/a> ksmbd. S\u00e5rbarheden er for\u00e5rsaget af en forkert organisering af l\u00e5sning af objekter i koden for oprettelse og afbrydelse af TCP-forbindelsen til ksmbd, hvilket muligg\u00f8r tilstande, hvor der henvises til allerede frigivet hukommelse (use-after-free).       <\/p>\n<p>Den anden s\u00e5rbarhed (CVE-2024-26594) f\u00f8rer til l\u00e6kage af kernehukommelsens indhold ved behandling af et ugyldigt mech-token i en anmodning sendt af klienten for at etablere en session. S\u00e5rbarheden skyldes en forkert behandling af data med SMB2 Mech-token og f\u00f8rer til l\u00e6sning af data uden for det tildelte bufferomr\u00e5de.    <\/p>\n<p>Der kan desuden n\u00e6vnes flere andre s\u00e5rbarheder i Linux-kernen:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-52439 \u2014 adgang til allerede frigivet hukommelse (use-after-free) i funktionen uio_open i uio-subsystemet, som potentielt kan give en lokal bruger mulighed for at k\u00f8re sin kode med kernelrettigheder.\n<li class=\"l\"> CVE-2024-26582 \u2014 adgang til allerede frigivet hukommelse (use-after-free) i implementeringen af TLS p\u00e5 kernelniveau (ktls), som potentielt kan give mulighed for at h\u00e6ve sine privilegier under dekrypteringsoperationer.\n<li class=\"l\"> CVE-2024-0646 \u2014 skrivning til en hukommelsesadresse uden for bufferen i ktls-subsystemet ved en bestemt lokal manipulation af ktls-socket ved hj\u00e6lp af funktionen splice. S\u00e5rbarheden kan potentielt give mulighed for at h\u00e6ve sine privilegier i systemet.\n<li class=\"l\"> CVE-2023-6932 \u2014 kapl\u00f8bstilstand i implementeringen af IGMP-protokollen (Internet Group Management Protocol) i IPv4-stakken, hvilket f\u00f8rer til adgang til allerede frigivet hukommelse (use-after-free). S\u00e5rbarheden kan potentielt give en lokal bruger mulighed for at h\u00e6ve sine privilegier i systemet.\n<li class=\"l\"> CVE-2023-52435 \u2014 overfyldning af MSS i funktionen skb_segment() i netv\u00e6rksstakken i kernen.\n<li class=\"l\"> CVE-2024-26601 \u2014 fejl i koden til frigivelse af blokke i ext4 FS kan bruges til at beskadige buddy bitmap.\n<li class=\"l\"> CVE-2024-26598 \u2014 adgang til allerede frigivet hukommelse (use-after-free) i hypervisoren. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/vps\/abuzoustojchivye-vps\/\"   title=\"KVM\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4386\">KVM<\/a>.        <\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60668\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u043c \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u0432 \u044f\u0434\u0440\u043e Linux \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SMB, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0431\u0435\u0437 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u044f\u0434\u0440\u0430 \u0438\u043b\u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043f\u0430\u043c\u044f\u0442\u0438 \u044f\u0434\u0440\u0430 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043c\u043e\u0434\u0443\u043b\u0435\u043c ksmbd. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u044f\u0434\u0440\u0430 5.15, \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0431\u044b\u043b \u043f\u0440\u0438\u043d\u044f\u0442 \u043c\u043e\u0434\u0443\u043b\u044c ksmbd. [&hellip;]<\/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-113876","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u043c \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u0432 \u044f\u0434\u0440\u043e Linux \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SMB, 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