{"id":81560,"date":"2020-05-14T19:42:19","date_gmt":"2020-05-14T17:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonno-ekspluatiruemye-uyazvimosti-vo-freebsd"},"modified":"2020-05-14T19:42:19","modified_gmt":"2020-05-14T17:42:19","slug":"udalyonno-ekspluatiruemye-uyazvimosti-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/udalyonno-ekspluatiruemye-uyazvimosti-vo-freebsd","title":{"rendered":"Kaugjuhitavad haavatavused FreeBSD-s","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>FreeBSD-is <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/thread.html\">on likvideeritud<\/a><\/noindex> Viis haavatavust, sealhulgas probleemid, mis v\u00f5ivad potentsiaalselt viia m\u00e4lus\u00fcsteemide tasemel andmete kirjutamiseni, kui saadetakse teatud v\u00f5rgu paketid, v\u00f5i v\u00f5imaldavad kohalikel kasutajatel oma \u00f5iguste t\u00f5stmist. Haavatavused on parandatud v\u00e4rskendustes 12.1-RELEASE-p5 ja 11.3-RELEASE-p9. <\/p>\n<p>K\u00f5ige ohtlikum haavatavus (<noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/001950.html\">CVE-2020-7454<\/a><\/noindex>) on p\u00f5hjustatud puudulikust paketi suuruse kontrollimisest libalias raamatukogus protokollispetsiifiliste peadekkide anal\u00fc\u00fcsimisel. Libalias raamatukogu kasutatakse ipfw pakettfiltris aadresside t\u00f5lkimiseks ning sisaldab t\u00fc\u00fcpilisi aadresside asendamise funktsioone IP-pakettides ja protokollide dekodeerimisel. Haavatavus v\u00f5imaldab spetsiaalselt vormindatud v\u00f5rgu paketi saatmise teel saavutada andmete lugemist v\u00f5i kirjutamist tuuma m\u00e4lualasse (NAT-i teostamisel tuumas) v\u00f5i protsessi<br \/>\nnatd (kui NAT-i realiseerimine toimub kasutajaruumi). Probleem ei puuduta NAT-i konfiguratsioone, mis on koostatud pf ja ipf pakettfiltrite abil, samuti ipfw konfiguratsioone, kus NAT-i ei kasutata. <\/p>\n<p>Teised haavatavused:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/001951.html\">CVE-2020-7455<\/a><\/noindex> \u2014 veel kaugel kasutatavad haavatavus libalias, mis on seotud FTP t\u00f6\u00f6tleja pakettide pikkuse vale arvutamisega. Probleem piirdub mitme baitide andmete lekkimisega tuumam\u00e4lu v\u00f5i protsessi natd-valdkonnast.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/001953.html\">CVE-2019-15879<\/a><\/noindex> \u2014 haavatavus moodulis cryptodev, mis on p\u00f5hjustatud juba vabastatud m\u00e4lu piirkonna (use-after-free) juurdep\u00e4\u00e4sust ja v\u00f5imaldab mittepriviligeeritud protsessil kirjutada tuumam\u00e4lu suvalistele osadele. Haavatavuse blokeerimiseks soovitatakse laadida moodul cryptodev k\u00e4suga \u00abkldunload cryptodev\u00bb, kui see on laaditud (vaikimisi cryptodev ei ole laaditud). Moodul cryptodev pakub kasutaja ruumis rakendustele juurdep\u00e4\u00e4su \/dev\/crypto liidesele, et teha kr\u00fcptograafiliste operatsioonide riistvaralist kiirendamist (AES-NI ja OpenSSL \/dev\/crypto ei kasuta).\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/001954.html\">CVE-2019-15880<\/a><\/noindex> \u2014 teine haavatavus cryptodev, mis v\u00f5imaldab mitteprivilegeeritud kasutajal algatada tuuma krahhi, saates p\u00e4ringu vale MAC-i kr\u00fcptograafilise operatsiooni t\u00e4itmiseks. Probleem on p\u00f5hjustatud MAC-v\u00f5tme suuruse kontrollimise puudumisest m\u00e4lupuhvri eraldamisel selle talletamiseks (puhver loodi kasutaja edastatud andmete p\u00f5hjal suuruse kohta, ilma tegeliku suuruse kontrollimiseta).\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/001952.html\">CVE-2019-15878<\/a><\/noindex> \u2014 haavatavus SCTP (Stream Control Transmission Protocol) protokolli rakenduses, mis on p\u00f5hjustatud jagatud v\u00f5tme vale kontrollimisest, mida rakendatakse SCTP-AUTH laienduse kaudu SCTP j\u00e4rjestuste autentimiseks. Kohalik rakendus v\u00f5ib l\u00e4bi Socket API uuendada v\u00f5tit, katkestades samal ajal SCTP \u00fchenduse, mis toob kaasa vabastatud m\u00e4lu piirkonna (use-after-free) kasutamise.\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=52948\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e FreeBSD \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u043f\u044f\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0441\u0440\u0435\u0434\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0438\u043c\u0435\u044e\u0442\u0441\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u044f\u0434\u0440\u0430 \u043f\u0440\u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0438\u043b\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u044b \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 12.1-RELEASE-p5 \u0438 11.3-RELEASE-p9. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-7454) \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u0434\u043e\u043b\u0436\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0440\u0430\u0437\u043c\u0435\u0440\u0430 \u043f\u0430\u043a\u0435\u0442\u0430 \u0432 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 libalias \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u0447\u043d\u044b\u0445 \u0434\u043b\u044f [&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-81560","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u043e FreeBSD \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u043f\u044f\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0441\u0440\u0435\u0434\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0438\u043c\u0435\u044e\u0442\u0441\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e.\" \/>\n\t<meta name=\"robots\" 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