{"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\/novosti-interneta\/udalyonno-ekspluatiruemye-uyazvimosti-vo-freebsd","title":{"rendered":"Kaugjuhitavad haavatavused FreeBSD-s","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>FreeBSD-s <noindex><a rel=\"nofollow\" href=\"https:\/\/lists.freebsd.org\/pipermail\/freebsd-announce\/2020-May\/thread.html\">eemaldatud<\/a><\/noindex> viis haavatavust, sealhulgas probleeme, mis v\u00f5ivad potentsiaalselt p\u00f5hjustada andmete \u00fclekirjutamist tuumatasemel teatud v\u00f5rgupakettide saatmisel v\u00f5i v\u00f5imaldada kohalikul kasutajal oma \u00f5igusi t\u00f5sta. Haavatavused on parandatud versioonides 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>) tuleneb puudulikust paketi suuruse kontrollimisest libalias teegis, kui eriprotokollide p\u00e4iseid anal\u00fc\u00fcsitakse. Libalias teeki kasutatakse ipfw paketifiltris aadresside t\u00f5lkimiseks ja see sisaldab t\u00fc\u00fcpilisi aadresside asendamise funktsioone IP-pakettides ning protokollide anal\u00fc\u00fcsi. Haavatavus v\u00f5imaldab spetsiaalselt koostatud v\u00f5rgupaketi saatmise kaudu saavutada andmete lugemist v\u00f5i kirjutamist tuumam\u00e4lu piirkondades (NAT realiseerimise korral tuumas) v\u00f5i protsessis<br \/>\nnatd (NAT realiseerimise korral kasutaja ruumis). Probleem ei m\u00f5juta NAT-konfiguratsioone, mis on loodud pf ja ipf paketifiltrite 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 veelus, mis on seotud libalias'ega ja tekib FTP t\u00f6\u00f6tlejas pakettide pikkuse vale hindamise t\u00f5ttu. Probleem piirneb mitme baitide sisu lekkimisega tuuma v\u00f5i natd protsessi m\u00e4lust.\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 cryptodev moodulis, mis tuleneb juba vabastatud m\u00e4lu piirkonna kasutamisest (use-after-free) ning v\u00f5imaldab mittepriviligeeritud protsessil kirjutada tuuma m\u00e4lus suvalisi piirkondi. Haavatavuse blokeerimiseks soovitatakse moodul cryptodev v\u00e4lja laadida k\u00e4suga \u00abkldunload cryptodev\u00bb, kui see on laaditud (vaikimisi cryptodev ei laadita). Moodul cryptodev annab kasutusrakendustele juurdep\u00e4\u00e4su \/dev\/crypto liidesele, et kasutada riistvaralise kiirendusega kr\u00fcptograafiliste operatsioonide teostamiseks (AES-NI ja OpenSSL ei kasuta \/dev\/crypto).\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'is, mis v\u00f5imaldab mitteprivilegeeritud kasutajal tuuma kokku kukutada, saates vale MAC-i t\u00e4itmise kr\u00fcptograafilise operatsiooni taotluse. Probleem tuleneb MAC-v\u00f5tme suuruse kontrollimise puudumisest, kui m\u00e4lu eraldatakse selle salvestamiseks (m\u00e4lu eraldati p\u00f5hinedes kasutaja edastatud suurusele, ilma tegeliku suuruse kontrollimata).\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 tuleneb jagatud v\u00f5tme vale kontrollimisest, mida kasutatakse SCTP-AUTH laienduses SCTP j\u00e4rjestuste autentimiseks. Kohalik rakendus saab Socket API kaudu uuendada v\u00f5tit, katkestades samal ajal SCTP \u00fchenduse, mis toob kaasa juba vabastatud m\u00e4lu piirkonna kasutamise (use-after-free).\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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - 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 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