{"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\/et\/blog\/novosti-interneta\/uyazvimost-v-setevom-steke-yadra-linux","title":{"rendered":"Haavatavus Linuxi tuumaketis","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

TCP (Reliable Datagram Socket, net\/rds\/tcp.c) protokolli k\u00e4itleja koodis on avastatud haavatavus (CVE-2019-11815<\/a><\/noindex>), mis v\u00f5ib viia juba vabastatud m\u00e4lu piirkonna juurde p\u00e4\u00e4semise ja teenusekatkestuseni (probleemi \u00e4rakasutamise v\u00f5imalust koodi t\u00e4itmiseks ei saa potentsiaalselt v\u00e4listada). Probleem tekib v\u00f5idujooksu (race condition) olukorrast, mis v\u00f5ib juhtuda rds_tcp_kill_sock funktsiooni t\u00e4itmise ajal, kui puhastatakse sokleid v\u00f5rgu nime ruumi jaoks. <\/p>\n

Spetsifikatsioonis NVD<\/a><\/noindex> on probleem m\u00e4rgitud kui kaugelt ekspluateeritav, kuid kirjeldusest l\u00e4htuvalt parandustele<\/a><\/noindex>, ilma s\u00fcsteemis kohal okei olekute ja nime ruumide manipuleerimiseta ei saa kaugelt r\u00fcnnakut korraldada. Eelk\u00f5ige arendajate SUSE kohaselt on haavatavus ainult lokaalselt ekspluateeritav, r\u00fcnnaku korraldamine on piisavalt keeruline ja n\u00f5uab s\u00fcsteemis t\u00e4iendavaid \u00f5igusi. Kui NVD-s on ohtlikkuse tase hinnatud 9,3 (CVSS v2) ja 8,1 (CVSS v2) punkti, siis SUSE reitingus on ohtlikkuse tase hinnatud 6,4 punkti 10-st. arvamusele<\/a><\/noindex> SUSE arendajate haavatavust kasutatakse ainult lokaalselt, r\u00fcnnaku korraldamine on piisavalt keeruline ja eeldab s\u00fcsteemis t\u00e4iendavate privileegide olemasolu. Kui NVD-is on ohtlikkuse tase hinnatud 9.3 (CVSS v2) ja 8.1 (CVSS v2) punktiks, siis SUSE reitingu j\u00e4rgi on ohtlikkuse tase 10 punkti skaalal hinnatud 6.4 punktiks. <\/p>\n

Ubuntu esindajad samuti hindasid<\/a><\/noindex> probleem ohtu kui m\u00f5\u00f5dukas. Samal ajal on vastavalt CVSS v3.0 spetsifikatsioonile probleemile m\u00e4\u00e4ratud k\u00f5rge r\u00fcnnakutootlikkuse tase ning ekspluateerimise v\u00f5imaluse hind on vaid 2.2 punkti 10-st.<\/p>\n

Vastavalt aruandele<\/a><\/noindex> Cisco'lt on haavatavust v\u00f5imalik kaugelt \u00e4ra kasutada, saates TCP-pakette t\u00f6\u00f6tavatele v\u00f5rgu teenustele RDS<\/a><\/noindex> ja eksisteerib juba ekspluataatori protot\u00fc\u00fcp. Kui t\u00f5ene see teave on, ei ole veel selge; v\u00f5ib-olla on raportis lihtsalt kunstiliselt kujutatud NVD oletusi. Vastavalt andmetele<\/a><\/noindex> VulDB-le pole ekspluataatorit veel loodud ja probleem on ekspluateeritud ainult lokaalselt.<\/p>\n

Probleem ilmneb tuumades kuni 5.0.8 ning on blokeeritud m\u00e4rtsi parandusega<\/a><\/noindex>, mis on kaasatud tuuma 5.0.8. Enamikus jaotustes j\u00e4\u00e4b probleem ikkagi lahendamata (Debian<\/a><\/noindex>, RHEL<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>). Parandus on v\u00e4lja antud SLE12 SP3, openSUSE 42.3 ja Fedora<\/a><\/noindex>.<\/p>\n

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

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

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Probleem tekib j\u00f5hkruse tingimusest, mis v\u00f5ib ilmneda rds_tcp_kill_sock funktsiooni t\u00e4itmise ajal puhastamise hetkel.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-setevom-steke-yadra-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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 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