{"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\/sl\/blog\/news\/uyazvimost-v-setevom-steke-yadra-linux","title":{"rendered":"Ranljivost u mre\u017enom stogu jezgre Linuxa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V kodi obdelovalnika protokola RDS na osnovi TCP (Reliable Datagram Socket, net\/rds\/tcp.c) je bila odkrita ranljivost (CVE-2019-11815<\/a><\/noindex>), ki lahko pripelje do dostopa do \u017ee osvobojene spominske povr\u0161ine in do po\u017earne napake (ni izklju\u010dena mo\u017enost izkori\u0161\u010danja te\u017eave za izvajanje kode). Problema se pojavi v stanju dirke (race condition), ki se lahko zgodi med izvajanjem funkcije rds_tcp_kill_sock ob \u010di\u0161\u010denju socketov za omre\u017ena imena. <\/p>\n

V specifikaciji NVD<\/a><\/noindex> je te\u017eava ozna\u010dena kot oddaljeno izkori\u0161\u010dena, vendar sode\u010d po opisu odpravo<\/a><\/noindex>, brez lokalne prisotnosti v sistemu in manipulacije z omre\u017enimi imeni ni mogo\u010de izvesti napada na daljavo. Zlasti po mi\u0161ljenju<\/a><\/noindex> razvijalcih SUSE ranljivost le lokalno izkori\u0161\u010da, organizacija napada pa je dovolj zapletena in zahteva dodatne privilegije v sistemu. Medtem ko je v NVD raven nevarnosti ocenjena na 9.3 (CVSS v2) in 8.1 (CVSS v2) to\u010dke, je po oceni SUSE nevarnost ocenjena na 6.4 to\u010dke od 10. <\/p>\n

Predstavniki Ubuntu so prav tako ocenili<\/a><\/noindex> nevarnost te\u017eave kot zmerno. Hkrati je v skladu s specifikacijo CVSS v3.0 te\u017eavi dodeljena visoka stopnja te\u017eavnosti napada, mo\u017enost izkori\u0161\u010danja pa je dodeljena le 2.2 to\u010dke od 10.<\/p>\n

S\u00fadiac pod\u013ea poro\u010dilu<\/a><\/noindex> podjetja Cisco se ranljivost izkori\u0161\u010da oddaljeno s po\u0161iljanjem TCP paketov na delovne omre\u017ene storitve RDS<\/a><\/noindex> in \u017ee obstaja prototip izkori\u0161\u010devalca. Kak\u0161na je resni\u010dnost teh informacij, zaenkrat ni jasno, mo\u017eno je, da so v poro\u010dilu umetni\u0161ko predstavljene predpostavke NVD. Po informacijah<\/a><\/noindex> VulDB izkori\u0161\u010devalec \u0161e ni ustvarjen in te\u017eava se izkori\u0161\u010da le lokalno.<\/p>\n

Te\u017eava se poka\u017ee v jedrih do 5.0.8 in je blokirana z mar\u010devskim popravkom<\/a><\/noindex>, ki je vklju\u010den v jedro 5.0.8. V ve\u010dini distribucij te\u017eava ostaja odprta (Debian<\/a><\/noindex>, RHEL<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>). Popravilo je bilo izdano za SLE12 SP3, openSUSE 42.3 in Fedora<\/a><\/noindex>.<\/p>\n

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

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

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\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\udd47Vulnerabilnost v omre\u017eni steni jedra Linux | ProHoster","description":"V kodi obdelovalnika protokola RDS na osnovi TCP (Reliable Datagram Socket, net\/rds\/tcp.c) je bila odkrita ranljivost 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