{"id":33548,"date":"2019-10-31T21:53:15","date_gmt":"2019-10-31T18:53:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimost-v-setevom-steke-yadra-linux\/"},"modified":"2019-10-31T21:53:15","modified_gmt":"2019-10-31T18:53:15","slug":"uyazvimost-v-setevom-steke-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/no\/blog\/news\/uyazvimost-v-setevom-steke-yadra-linux","title":{"rendered":"S\u00e5rbarhet i nettverksstakken i Linux-kjernen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I koden til RDS-protokollbehandleren basert p\u00e5 TCP (Reliable Datagram Socket, net\/rds\/tcp.c) ble det oppdaget en s\u00e5rbarhet (CVE-2019-11815<\/a><\/noindex>), som kan f\u00f8re til tilgang til allerede frigjort minneomr\u00e5de og tjenestenekt (det kan potensielt ikke utelukkes muligheten for utnyttelse av problemet for \u00e5 utf\u00f8re kode). Problemet oppst\u00e5r p\u00e5 grunn av en race condition som kan oppst\u00e5 n\u00e5r funksjonen rds_tcp_kill_sock kj\u00f8rer under rensing av sokler for nettverksnavnerommet. <\/p>\n

I spesifikasjonen NVD<\/a><\/noindex> er problemet merket som fjerndrevet utnyttbar, men if\u00f8lge beskrivelsen rettelser<\/a><\/noindex>, uten lokal tilstedev\u00e6relse i systemet og manipulasjon med navnerom, er det ikke mulig \u00e5 organisere et angrep eksternt. Spesielt if\u00f8lge mening<\/a><\/noindex> utviklerne av SUSE, s\u00e5rbarheten utnyttes kun lokalt, og det er ganske komplekst \u00e5 organisere et angrep som krever ytterligere privilegier i systemet. Hvis NVD vurderer faregraden til 9,3 (CVSS v2) og 8,1 (CVSS v2) poeng, vurderer SUSE faren til 6,4 av 10. <\/p>\n

Representanter fra Ubuntu har ogs\u00e5 vurdert<\/a><\/noindex> faren for problemet som moderat. I tillegg, i henhold til spesifikasjonen CVSS v3.0, tildeles problemet et h\u00f8yt angrepskompleksitetsniv\u00e5, og muligheten for utnyttelse er vurdert til kun 2,2 poeng av 10.<\/p>\n

If\u00f8lge I en rapport<\/a><\/noindex> fra Cisco utnyttes s\u00e5rbarheten eksternt ved \u00e5 sende TCP-pakker til aktive nettverkstjenester RDS<\/a><\/noindex> og det finnes allerede en prototype av et exploit. Hvorvidt denne informasjonen er n\u00f8yaktig er forel\u00f8pig uklart, muligens er rapporten kun kunstnerisk fremstilt basert p\u00e5 antagelser fra NVD. If\u00f8lge informasjonen<\/a><\/noindex> fra VulDB er exploit enn\u00e5 ikke laget, og problemet utnyttes kun lokalt.<\/p>\n

Problemet viser seg i kjerner opp til 5.0.8 og er blokkert av mars rettelsen<\/a><\/noindex>, som er inkludert i kjerner 5.0.8. I de fleste distribusjoner forblir problemet ul\u00f8st (Debian<\/a><\/noindex>, RHEL<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>). Rettelsen er utgitt for SLE12 SP3, openSUSE 42.3 og Fedora<\/a><\/noindex>.<\/p>\n

<\/a><\/noindex><\/p>\n

Kilde: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 RDS \u043d\u0430 \u0431\u0430\u0437\u0435 TCP (Reliable Datagram Socket, net\/rds\/tcp.c) \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-11815), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u043e\u0439 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043e\u0442\u043a\u0430\u0437\u0443 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438 (\u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 (race condition), \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043c\u043e\u0436\u0435\u0442 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u0443\u0442\u044c \u043f\u0440\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 rds_tcp_kill_sock \u0432 \u043c\u043e\u043c\u0435\u043d\u0442 \u043e\u0447\u0438\u0441\u0442\u043a\u0438 […]<\/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-33548","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\udd47S\u00e5rbarhet i Linux-kjernens nettverksstakk | ProHoster","description":"I koden til RDS-protokollbehandleren basert p\u00e5 TCP (Reliable Datagram Socket, net\/rds\/tcp.c) ble det oppdaget en s\u00e5rbarhet (","canonical_url":"https:\/\/prohoster.info\/no\/blog\/news\/uyazvimost-v-setevom-steke-yadra-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"nn_NO","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0441\u0442\u0435\u043a\u0435 \u044f\u0434\u0440\u0430 Linux | ProHoster","og:description":"\u0412 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 RDS \u043d\u0430 \u0431\u0430\u0437\u0435 TCP (Reliable Datagram Socket, net\/rds\/tcp.c) \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (","og:url":"https:\/\/prohoster.info\/no\/blog\/news\/uyazvimost-v-setevom-steke-yadra-linux","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T18:53:15+00:00","article:modified_time":"2019-10-31T18:53:15+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"33548","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-21 15:44:22","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 02:38:10","updated":"2026-01-21 15:44:22","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts\/33548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/comments?post=33548"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts\/33548\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/media?parent=33548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/categories?post=33548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/tags?post=33548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}