{"id":39427,"date":"2019-10-31T22:32:37","date_gmt":"2019-10-31T19:32:37","guid":{"rendered":"https:\/\/prohoster.info\/blog\/10-uyazvimostej-v-gipervizore-xen\/"},"modified":"2019-10-31T22:32:37","modified_gmt":"2019-10-31T19:32:37","slug":"10-uyazvimostej-v-gipervizore-xen","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/10-uyazvimostej-v-gipervizore-xen","title":{"rendered":"10 haavatavust h\u00fcpervisiitoris Xen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/\">Avaldatud<\/a><\/noindex> teave 10 Xen h\u00fcperviisori haavatavusest, millest viis (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/6\">CVE-2019-17341<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/2\">CVE-2019-17342<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/1\">CVE-2019-17340<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/5\">CVE-2019-17346<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/10\">CVE-2019-17343<\/a><\/noindex>) v\u00f5imaldab potentsiaalselt p\u00e4\u00e4seda \u00fcleolekuks praegusest k\u00fclaliskeskkonnast ja t\u00f5sta oma \u00f5igusi, \u00fcks haavatavus (CVE-2019-17347) v\u00f5imaldab privileege mitteomaval protsessil v\u00f5tta kontrolli teiste kasutajate protsesside \u00fcle samas k\u00fclaliss\u00fcsteemis, neli \u00fclej\u00e4\u00e4nud (CVE-2019-17344, CVE-2019-17345, CVE-2019-17348, CVE-2019-17351) haavatavust v\u00f5ivad p\u00f5hjustada teenusekatkestuse (host-keskkonna krahh). Probleemid on lahendatud versioonides <noindex><a rel=\"nofollow\" href=\"https:\/\/xenproject.org\/downloads\/\">Xen 4.12.1, 4.11.2 ja 4.10.4<\/a><\/noindex>.<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/6\">CVE-2019-17341<\/a><\/noindex> \u2014 v\u00f5imalus r\u00fcndajal kontrollitava k\u00fclaliss\u00fcsteemi kaudu saada h\u00fcperviisori tasemel juurdep\u00e4\u00e4s. Probleem ilmneb ainult x86 s\u00fcsteemides ja v\u00f5ib toimuda k\u00fclaliss\u00fcsteemidest, mis t\u00f6\u00f6tavad poolvirtualiseerimise (PV) re\u017eiimis, kui t\u00f6\u00f6tava k\u00fclaliss\u00fcsteemi juurde \u00fchendatakse uus PCI-seade. HVM ja PVH re\u017eiimis t\u00f6\u00f6tavates k\u00fclaliss\u00fcsteemides haavatavus ei ilmne;\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/1\">CVE-2019-17340<\/a><\/noindex> \u2014 m\u00e4lulekke oht, mis v\u00f5ib potentsiaalselt v\u00f5imaldada oma privileegide t\u00f5stmist v\u00f5i juurdep\u00e4\u00e4su teiste k\u00fclaliss\u00fcsteemide andmetele.<br \/>\nProbleem avaldub ainult hostides, millel on rohkem kui 16 TB RAM-i 64-bitistes s\u00fcsteemides ja 168 GB 32-bitistes.<br \/>\nHaavatavust saab \u00e4ra kasutada ainult k\u00fclaliss\u00fcsteemidest PV re\u017eiimis (HVM ja PVH re\u017eiimides t\u00f6\u00f6tades libxl kaudu haavatavust ei avaldu);<\/p>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/5\">CVE-2019-17346<\/a><\/noindex> \u2014 haavatavus PCID-de (Process Context Identifiers) kasutamisel, et parandada r\u00fcnnakute vastu kaitsmise j\u00f5udlust.<br \/>\nMeltdown, v\u00f5imaldab p\u00e4\u00e4seda teiste k\u00fclaliss\u00fcsteemide andmetele ja potentsiaalselt t\u00f5sta \u00f5igusi. Haavatavust saab \u00e4ra kasutada ainult k\u00fclaliss\u00fcsteemidest PV re\u017eiimis x86 s\u00fcsteemides (probleem ei avaldu HVM ja PVH re\u017eiimides ning konfiguratsioonides, kus ei ole k\u00fclaliss\u00fcsteeme koos PCID-ga (PCID on vaikimisi aktiveeritud));<\/p>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/2\">CVE-2019-17342<\/a><\/noindex> \u2014 probleem XENMEM_exchange h\u00fcperk\u00f5ne rakendamises, mis v\u00f5imaldab t\u00f5sta oma privileege ainult \u00fche k\u00fclaliss\u00fcsteemiga keskkondades. Haavatavust saab \u00e4ra kasutada ainult k\u00fclaliss\u00fcsteemidest, mis t\u00f6\u00f6tavad PV re\u017eiimis (HVM ja PVH re\u017eiimides haavatavus ei ilmne);\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/10\/25\/10\">CVE-2019-17343<\/a><\/noindex> \u2014 vale kaardistamine IOMMU-s v\u00f5imaldab, kui k\u00fclaliss\u00fcsteemist on juurdep\u00e4\u00e4s f\u00fc\u00fcsilisele seadmele, kasutada DMA-d oma m\u00e4lulehek\u00fclje tabeli muutmiseks ja saada juurdep\u00e4\u00e4s hosti tasemel. Haavatavus ilmneb ainult k\u00fclaliss\u00fcsteemides, mis t\u00f6\u00f6tavad PV re\u017eiimis ja millel on \u00f5igused PCI-seadmete suunamiseks.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51764\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e 10 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0435 Xen, \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u044f\u0442\u044c (CVE-2019-17341, CVE-2019-17342, CVE-2019-17340, CVE-2019-17346, CVE-2019-17343) \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0432\u044b\u0439\u0442\u0438 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0442\u0435\u043a\u0443\u0449\u0435\u0433\u043e \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0433\u043e \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u0438 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438, \u043e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-17347) \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0443 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043d\u0430\u0434 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430\u043c\u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0432 \u0442\u043e\u0439 \u0436\u0435 \u0433\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u043e\u0441\u0442\u0430\u0432\u0448\u0438\u0435\u0441\u044f \u0447\u0435\u0442\u044b\u0440\u0435 (CVE-2019-17344, CVE-2019-17345, CVE-2019-17348, CVE-2019-17351) \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0432\u044b\u0437\u0432\u0430\u0442\u044c [&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-39427","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All 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