{"id":102953,"date":"2022-01-13T15:37:33","date_gmt":"2022-01-13T13:37:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d0%b8-%d0%b2-systemd-flatpak-samba-freerdp-clamav-node-js"},"modified":"2022-01-13T15:37:33","modified_gmt":"2022-01-13T13:37:33","slug":"uyazvimosti-v-systemd-flatpak-samba-freerdp-clamav-node-js","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/uyazvimosti-v-systemd-flatpak-samba-freerdp-clamav-node-js","title":{"rendered":"\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432  systemd, Flatpak, Samba, FreeRDP, Clamav, Node.js","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V orodju systemd-tmpfiles, ki je del systemd, je bila odkrita ranljivost (CVE-2021-3997), ki omogo\u010da nekontrolirano rekurzijo. To te\u017eavo je mogo\u010de izkoristiti za izvajanje napada zavrnitve storitve med nalaganjem sistema s ustvarjanjem velikega \u0161tevila vkopanih podmap v mapi \/tmp. Popravilo je trenutno na voljo v obliki popravka. Posodobitve paketov za odpravo te\u017eave so predlagane v Ubuntu in SUSE, vendar trenutno niso na voljo v Debi\u00e1nu, RHEL in Fedora (popravki so v fazi testiranja).     <\/p>\n<p>\u041f\u0440\u0438 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0438 \u0442\u044b\u0441\u044f\u0447 \u0432\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u043e\u0432 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 &#171;systemd-tmpfiles &#8212;remove&#187; \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e\u043c\u0443 \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044e \u0438\u0437-\u0437\u0430 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044f \u0441\u0442\u0435\u043a\u0430. \u041e\u0431\u044b\u0447\u043d\u043e \u0443\u0442\u0438\u043b\u0438\u0442\u0430 systemd-tmpfiles \u0432 \u043e\u0434\u043d\u043e\u043c \u0432\u044b\u0437\u043e\u0432\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0438 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u043e\u0432 (&#171;systemd-tmpfiles &#8212;create &#8212;remove &#8212;boot &#8212;exclude-prefix=\/dev&#187;), \u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u0432\u043d\u0430\u0447\u0430\u043b\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435, \u0430 \u043f\u043e\u0442\u043e\u043c \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435, \u0442.\u0435. \u043a\u0440\u0430\u0445 \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u0432\u0435\u0434\u0451\u0442 \u043a \u0442\u043e\u043c\u0443, \u0447\u0442\u043e \u043d\u0435 \u0431\u0443\u0434\u0443\u0442 \u0441\u043e\u0437\u0434\u0430\u043d\u044b \u0432\u0430\u0436\u043d\u044b\u0435 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0444\u0430\u0439\u043b\u044b, \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u044b\u0435 \u0432 \/usr\/lib\/tmpfiles.d\/*.conf.      <\/p>\n<p>Poleg tega se omenja bolj nevaren scenarij napada na Ubuntu 21.04: ker zaradi zru\u0161itve systemd-tmpfiles ni ustvarjena datoteka \/run\/lock\/subsys, medtem ko je mapa \/run\/lock dostopna za pisanje vsem uporabnikom, lahko napadalec ustvari mapo \/run\/lock\/subsys pod svojim identifikatorjem in s ustvarjanjem simbolnih povezav, ki se prekrivajo s zaklepnimi datotekami sistemskih procesov, izvede preklic sistemskih datotek.     <\/p>\n<p>Poleg tega lahko omenimo objavo novih izdaj projektov Flatpak, Samba, FreeRDP, Clamav in Node.js, v katerih so odpravljene ranljivosti:    <\/p>\n<ul>\n<li class=\"l\"> \u0412 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u0440\u0435\u043b\u0438\u0437\u0430\u0445 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u044f \u0434\u043b\u044f \u0441\u0431\u043e\u0440\u043a\u0438 \u0441\u0430\u043c\u043e\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 Flatpak  1.10.6 \u0438  1.12.3 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: \u041f\u0435\u0440\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-43860) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0440\u0438 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0435 \u043f\u0430\u043a\u0435\u0442\u0430 \u0438\u0437 \u043d\u0435\u043f\u0440\u043e\u0432\u0435\u0440\u0435\u043d\u043d\u043e\u0433\u043e \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u044f \u0447\u0435\u0440\u0435\u0437 \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u0438 \u0441 \u043c\u0435\u0442\u0430\u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0441\u043a\u0440\u044b\u0442\u044c \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u044b\u0445 \u043f\u043e\u043b\u043d\u043e\u043c\u043e\u0447\u0438\u0439 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438. \u0412\u0442\u043e\u0440\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (\u0431\u0435\u0437 CVE) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0441\u0431\u043e\u0440\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 \u043a\u043e\u043c\u0430\u043d\u0434\u043e\u0439 &#171;flatpak-builder &#8212;mirror-screenshots-url&#187; \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0438 \u0432 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u0424\u0421 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u0441\u0431\u043e\u0440\u043e\u0447\u043d\u043e\u0433\u043e \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430.\n<li class=\"l\">V posodobitvi Samba 4.13.16 je odpravljena ranljivost (CVE-2021-43566), ki omogo\u010da napadalcu, da povzro\u010di ustvarjanje na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/dts-newyork\/\"   title=\"stre\u017enikom\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2695\">stre\u017enikom<\/a> katalo\u0161ka podro\u010dja, ki presegajo izvozno obmo\u010dje FS (te\u017eava je posledica stanja dirke in jo je te\u017eko izkoristiti v praksi, vendar je teoreti\u010dno mo\u017ena). Te\u017eavi so izpostavljene razli\u010dice do 4.13.16.\n<p>Zelo dobro! Objavljeno je tudi poro\u010dilo o \u0161e eni podobni ranljivosti (CVE-2021-20316), ki omogo\u010da overjenemu uporabniku, da preko manipulacije s simbolnimi povezavami prebere ali spremeni vsebino datoteke ali metapodatkov kataloga v obmo\u010dju FS. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/dts-los-angeles\/\"   title=\"stre\u017enika\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3788\">stre\u017enika<\/a> izven izvozne sekcije. Te\u017eava je bila odpravljena v izdaji 4.15.0, vendar vpliva tudi na prej\u0161nje razli\u010dice. Popravki za starej\u0161e razli\u010dice ne bodo objavljeni, ker stara arhitektura Samba VFS ne omogo\u010da re\u0161evanja te\u017eave zaradi vezave operacij z metapodatki na datote\u010dne poti (v Samba 4.15 je bil sloj VFS popolnoma predelan). Tveganje te te\u017eave zmanj\u0161uje to, da je precej zapleteno za izkori\u0161\u010danje in pravice dostopa uporabnika morajo dovoljevati branje ali pisanje v ciljno datoteko ali katalog.      <\/p>\n<li class=\"l\"> V razli\u010dici projekta FreeRDP 2.5, ki ponuja svobodno implementacijo protokola za oddaljeni dostop do delovne povr\u0161ine RDP (Remote Desktop Protocol), so bile odpravljene tri varnostne te\u017eave (identifikatorji CVE niso dodeljeni), ki lahko privedejo do prelitja pomnilnika pri uporabi neustrezne lokalizacije, obdelavi posebno oblikovanih parametrov registra in navedbi nepravilno oblikovanega imena raz\u0161iritve. Med spremembami v novi razli\u010dici izstopa podpora za knji\u017enico OpenSSL 3.0, implementacija nastavitve TcpConnectTimeout, izbolj\u0161ana zdru\u017eljivost z LibreSSL in re\u0161itev te\u017eav s pomnilnikom v okolju na osnovi Wayland.\n<li class=\"l\"> \u0412 \u043d\u043e\u0432\u044b\u0445 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u0430\u043d\u0442\u0438\u0432\u0438\u0440\u0443\u0441\u043d\u043e\u0433\u043e \u043f\u0430\u043a\u0435\u0442\u0430  ClamAV 0.103.5 \u0438 0.104.2 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c CVE-2022-20698, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u043c \u0447\u0442\u0435\u043d\u0438\u0435\u043c \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043a\u0440\u0430\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430, \u0435\u0441\u043b\u0438 \u043f\u0430\u043a\u0435\u0442 \u0441\u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u043d \u0441 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 libjson-c \u0438 \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0430 \u043e\u043f\u0446\u0438\u044f CL_SCAN_GENERAL_COLLECT_METADATA (clamscan &#8212;gen-json).\n<li class=\"l\"> V posodobitvah platforme Node.js 16.13.2, 14.18.3, 17.3.1 in 12.22.9 so odpravili \u0161tiri ranljivosti: obvoz preverjanja potrdila pri overjanju omre\u017ene povezave zaradi nepravilne pretvorbe SAN (Subject Alternative Names) v nizovni format (CVE-2021-44532); nepravilno obravnavanje ve\u010d vrednosti v poljih subject in issuer, ki se lahko uporablja za obvoz preverjanja omenjenih polj v potrdilih (CVE-2021-44533); obvoz omejitev, povezanih z SAN-tipom URI v potrdilih (CVE-2021-44531); nezadostno preverjanje vhodnih podatkov v funkciji console.table(), ki se lahko uporabi za dodelitev praznih nizov digitalnim klju\u010dem (CVE-2022-21824).          <\/ul>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56498\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 systemd \u0443\u0442\u0438\u043b\u0438\u0442\u0435 systemd-tmpfiles \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-3997), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043d\u0435\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u0443\u044e \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u044e. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u043e\u0442\u043a\u0430\u0437\u0430 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438 \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0432 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0435 \/tmp \u0431\u043e\u043b\u044c\u0448\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0432\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u043f\u043e\u0434\u043a\u0430\u0442\u0430\u043b\u043e\u0433\u043e\u0432. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u043a\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e \u0432 \u0444\u043e\u0440\u043c\u0435 \u043f\u0430\u0442\u0447\u0430. \u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u044b \u0432 Ubuntu \u0438 SUSE, \u043d\u043e \u043f\u043e\u043a\u0430 \u043d\u0435\u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u0432 [&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-102953","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u043e \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 systemd \u0443\u0442\u0438\u043b\u0438\u0442\u0435 systemd-tmpfiles \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-3997), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u0437\u0432\u0430\u0442\u044c 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