{"id":71318,"date":"2020-02-25T07:34:19","date_gmt":"2020-02-25T04:34:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimosti-v-opensmtpd-pozvolyayushhie-udalyonno-i-lokalno-poluchit-prava-root"},"modified":"2020-03-03T16:10:53","modified_gmt":"2020-03-03T13:10:53","slug":"uyazvimosti-v-opensmtpd-pozvolyayushhie-udalyonno-i-lokalno-poluchit-prava-root","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimosti-v-opensmtpd-pozvolyayushhie-udalyonno-i-lokalno-poluchit-prava-root","title":{"rendered":"OpenSMTPD haavatavused, mis v\u00f5imaldavad kaugel ja kohapeal saada root \u00f5igusi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Qualys ettev\u00f5te <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/02\/24\/5\">tuvas<\/a><\/noindex> veel \u00fcks kaugjuhtimisega kriitiline haavatavus (CVE-2020-8794) postiserveris <noindex><a rel=\"nofollow\" href=\"https:\/\/opensmtpd.org\/\">OpenSMTPD<\/a><\/noindex>, mida arendab OpenBSD projekt. Nagu jaanuari l\u00f5pus tuvastatud <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52267\">haavatavus<\/a><\/noindex>, uus probleem v\u00f5imaldab kaugjuhitult t\u00e4ita suvalisi shell-i k\u00e4ske serveris root-kasutaja \u00f5igustes. Haavatavus <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/misc@opensmtpd.org\/msg04888.html\">eemaldatud<\/a><\/noindex> v\u00e4ljalaskes <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/OpenSMTPD\/OpenSMTPD\/releases\">OpenSMTPD 6.6.4p1<\/a><\/noindex>. <\/p>\n<p>Probleem tuleneb veast koodis, mis teostab posti edastamist kaugpostiserverisse (mitte koodis, mis t\u00f6\u00f6tleb sissetulevaid \u00fchendusi). R\u00fcnnak on v\u00f5imalik nii kliendi kui serveri poolel. Kliendi poolel on r\u00fcnnak v\u00f5imalik OpenSMTPD vaikeseadistuses, kus OpenSMTPD aktsepteerib p\u00e4ringuid ainult kohaliku v\u00f5rgu liideselt (localhost) ja saadab postis\u00f5numid v\u00e4listele serveritele. Haavatavuse \u00e4rakasutamiseks piisab, kui OpenSMTPD seadistab postiserveriga, mis on r\u00fcndaja kontrolli all, seansi posti edastamise protsessi k\u00e4igus, v\u00f5i kui r\u00fcndaja suudab kliendi \u00fchendusse sekkuda (MITM v\u00f5i \u00fcmber suunamine DNS-i v\u00f5i BGP r\u00fcnnakute kaudu).<\/p>\n<p>Serveri r\u00fcnnaku korral peab OpenSMTPD olema seadistatud v\u00e4liste v\u00f5rgup\u00e4ringute vastuv\u00f5tmiseks teistelt meiliserversidelt v\u00f5i toetama kolmandate osapoolte teenuseid, mis v\u00f5imaldavad saata p\u00e4ringuid juhuslikule e-posti aadressile (n\u00e4iteks aadressi kinnitamise vormid veebisaitidel). N\u00e4iteks v\u00f5ib r\u00fcndaja \u00fchendada OpenSMTPD-serveriga ja saata vale e-kirja (mitteeksisteerivale kasutajale), mis toob kaasa vastuse e-kirja, mis sisaldab veakoodi (bounce), saatmise r\u00fcndaja serverisse. R\u00fcndaja v\u00f5ib kasutada haavatavust hetkel, mil OpenSMTPD \u00fchendub, et edastada teavet r\u00fcndaja serverisse. R\u00fcnnaku k\u00e4igus sisestatud k\u00e4sud salvestatakse faili, mis t\u00e4idetakse root-\u00f5igustega OpenSMTPD taask\u00e4ivitamisel, seet\u00f5ttu peab r\u00fcndaja r\u00fcnnaku t\u00e4ielikuks realiseerimiseks ootama OpenSMTPD taask\u00e4imist v\u00f5i p\u00f5hjustama OpenSMTPD kokkuvarisemise.<\/p>\n<p>\u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 mta_io() \u0432 \u043a\u043e\u0434\u0435 \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u043c\u043d\u043e\u0433\u043e\u0441\u0442\u0440\u043e\u0447\u043d\u043e\u0433\u043e \u043e\u0442\u0432\u0435\u0442\u0430, \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c\u043e\u0433\u043e \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u044b\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c \u043f\u043e\u0441\u043b\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, &#171;250-ENHANCEDSTATUSCODES&#187; \u0438 &#171;250 HELP&#187;). \u0412 OpenSMTPD \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u0430\u043d\u043e, \u0447\u0442\u043e \u043f\u0435\u0440\u0432\u0430\u044f \u0441\u0442\u0440\u043e\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0442\u0440\u0451\u0445\u0437\u043d\u0430\u0447\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u0438 \u0442\u0435\u043a\u0441\u0442, \u0440\u0430\u0437\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u043c &#171;-&#171;, \u0430 \u0432\u0442\u043e\u0440\u0430\u044f \u0441\u0442\u0440\u043e\u043a\u0430  \u0442\u0440\u0451\u0445\u0437\u043d\u0430\u0447\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u0438 \u0442\u0435\u043a\u0441\u0442, \u0440\u0430\u0437\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0435 \u043f\u0440\u043e\u0431\u0435\u043b\u043e\u043c. \u0415\u0441\u043b\u0438 \u0432\u043e \u0432\u0442\u043e\u0440\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0435 \u043f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445\u0437\u043d\u0430\u0447\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u043d\u0435 \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u043f\u0440\u043e\u0431\u0435\u043b \u0438 \u0442\u0435\u043a\u0441\u0442, \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0439 \u0434\u043b\u044f \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0442\u0435\u043a\u0441\u0442\u0430, \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u043d\u0430 \u0431\u0430\u0439\u0442, \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0437\u0430 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u043c &#8216;&#92;0&#8217;  \u0438 \u043f\u0440\u0435\u0434\u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0435\u0442\u0441\u044f \u043f\u043e\u043f\u044b\u0442\u043a\u0430 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u0431\u0443\u0444\u0435\u0440 \u0434\u0430\u043d\u043d\u044b\u0445, \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0445 \u043f\u043e\u0441\u043b\u0435 \u043a\u043e\u043d\u0446\u0430 \u0441\u0442\u0440\u043e\u043a\u0438.<\/p>\n<p>OpenBSD projekti soovil on haavatavuse ekspluateerimise \u00fcksikasjade avaldamine edasi l\u00fckatud 26. veebruarini, et anda kasutajatele v\u00f5imalus oma s\u00fcsteeme uuendada. Probleem esineb koodibaasis alates 2015. aasta detsembrist, kuid koodi \u00f5igustega root'i t\u00e4itmine on v\u00f5imalik alates 2018. aasta maist. Uurijad on valmistanud t\u00f6\u00f6protot\u00fc\u00fcbi eksploidist, mis on edukalt testitud OpenSMTPD kogumites OpenBSD 6.6, OpenBSD 5.9, Debian 10, Debian 11 (testimine) ja Fedora 31 jaoks. <\/p>\n<p>OpenSMTPD-s on samuti <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/02\/24\/4\">tuvastatud<\/a><\/noindex> veel \u00fcks haavatavus (CVE-2020-8793), mis v\u00f5imaldab kohalikel kasutajatel lugeda s\u00fcsteemi mis tahes faili esimest rida. N\u00e4iteks on v\u00f5imalik n\u00e4ha faili \/etc\/master.passwd esimest rida, kus on salvestatud root-kasutaja parooli hash. Haavatavus v\u00f5imaldab lugeda ka k\u00f5iki teise kasutaja faili sisu, kui see fail asub samas FS-is, kus on kataloog \/var\/spool\/smtpd\/. Probleem ei ole paljudes Linuxi distributsioonides ekspluateeritav, kus v\u00e4\u00e4rtus \/proc\/sys\/fs\/protected_hardlinks on seadistatud 1-ks. <\/p>\n<p>Probleem on tingitud mittet\u00e4ielikust k\u00f5rvaldamisest <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=43090\">probleemide<\/a><\/noindex>, \u043e\u0437\u0432\u0443\u0447\u0435\u043d\u043d\u044b\u0445 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0430\u0443\u0434\u0438\u0442\u0430, \u043f\u0440\u043e\u0432\u0435\u0434\u0451\u043d\u043d\u043e\u0433\u043e Qualys \u0432 2015 \u0433\u043e\u0434\u0443. \u0410\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u043c\u043e\u0436\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u0433\u0440\u0443\u043f\u043f\u044b &#171;_smtpq&#187;, \u0432\u044b\u0441\u0442\u0430\u0432\u0438\u0432 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e &#171;PATH=.&#187; \u0438 \u0440\u0430\u0437\u043c\u0435\u0441\u0442\u0438\u0432 \u0432 \u0442\u0435\u043a\u0443\u0449\u0435\u043c \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0435 \u0441\u043a\u0440\u0438\u043f\u0442 \u0441 \u0438\u043c\u0435\u043d\u0435\u043c makemap (\u0443\u0442\u0438\u043b\u0438\u0442\u0430 smtpctl \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u0442  makemap \u0431\u0435\u0437 \u044f\u0432\u043d\u043e\u0433\u043e \u0443\u043a\u0430\u0437\u0430\u043d\u0438\u044f \u043f\u0443\u0442\u0438). \u041f\u043e\u043b\u0443\u0447\u0438\u0432 \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0433\u0440\u0443\u043f\u043f\u0435 &#171;_smtpq&#187; \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u0437\u0430\u0442\u0435\u043c \u043c\u043e\u0436\u0435\u0442 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0433\u043e\u043d\u043a\u0438 (\u0441\u043e\u0437\u0434\u0430\u0442\u044c \u0431\u043e\u043b\u044c\u0448\u043e\u0439 \u0444\u0430\u0439\u043b \u0432 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0435 offline \u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c \u0441\u0438\u0433\u043d\u0430\u043b SIGSTOP) \u0438, \u0434\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438, \u043f\u043e\u0434\u043c\u0435\u043d\u0438\u0442\u044c \u0444\u0430\u0439\u043b \u0432 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0435 offline  \u043d\u0430 \u0436\u0451\u0441\u0442\u043a\u0443\u044e \u0441\u0438\u043c\u0432\u043e\u043b\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0441\u0441\u044b\u043b\u043a\u0443, \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u044e\u0449\u0443\u044e \u043d\u0430 \u0446\u0435\u043b\u0435\u0432\u043e\u0439 \u0444\u0430\u0439\u043b, \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043d\u0443\u0436\u043d\u043e \u043f\u0440\u043e\u0447\u0438\u0442\u0430\u0442\u044c.<\/p>\n<p>Oluline on m\u00e4rkida, et Fedora 31-s v\u00f5imaldab haavatavus koheselt omandada root-grupi \u00f5igused, kuna protsess smtpctl on varustatud setgid root lipuga, mitte setgid smtpq-ga. Saades juurdep\u00e4\u00e4su root-r\u00fchmale, saab kirjutada \/var\/lib\/sss\/mc\/passwd sisu ja saada t\u00e4ieliku root-juurdep\u00e4\u00e4su s\u00fcsteemis.<\/p>\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=52423\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Qualys \u0432\u044b\u044f\u0432\u0438\u043b\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0443 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u0443\u044e \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-8794) \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0435 OpenSMTPD, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c OpenBSD. \u041a\u0430\u043a \u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0432 \u043a\u043e\u043d\u0446\u0435 \u044f\u043d\u0432\u0430\u0440\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043d\u043e\u0432\u0430\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 \u043a\u043e\u043c\u0430\u043d\u0434\u044b shell \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f root. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 OpenSMTPD 6.6.4p1. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u043a\u043e\u0434\u0435, \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0434\u043e\u0441\u0442\u0430\u0432\u043a\u0443 \u043f\u043e\u0447\u0442\u044b \u043d\u0430 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u044b\u0439 \u043f\u043e\u0447\u0442\u043e\u0432\u044b\u0439 [&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-71318","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Qualys \u0432\u044b\u044f\u0432\u0438\u043b\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0443 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u0443\u044e \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-8794) \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0435 OpenSMTPD, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c OpenBSD. \u041a\u0430\u043a \u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0432 \u043a\u043e\u043d\u0446\u0435 \u044f\u043d\u0432\u0430\u0440\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043d\u043e\u0432\u0430\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0434\u0430\u0451\u0442 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property=\"og:title\" content=\"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 OpenSMTPD, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0438 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Qualys \u0432\u044b\u044f\u0432\u0438\u043b\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0443 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u0443\u044e \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-8794) \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c \u0441\u0435\u0440\u0432\u0435\u0440\u0435 OpenSMTPD, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c 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content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-02-25T04:34:19+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-03-03T13:10:53+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47OpenSMTPD haavatavused, mis v\u00f5imaldavad kaugelt ja kohalikult saada root \u00f5igusi | ProHoster","description":"Qualys on avastanud veel \u00fche kaugjuhtimise kriitilise haavatavuse (CVE-2020-8794) OpenSMTPD postiserveris, mida arendatakse OpenBSD projektis. Nagu jaanuari l\u00f5pus avastatud haavatavus, v\u00f5imaldab uus probleem kaugjuhtimisega t\u00e4ita suvalisi shelli k\u00e4sklusi serveris root-kasutaja \u00f5igustes. Haavatavus on k\u00f5rvaldatud OpenSMTPD 6.6.4p1 v\u00e4ljaandes. 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