{"id":40697,"date":"2020-02-03T14:36:04","date_gmt":"2020-02-03T11:36:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/obnovlenie-openwrt-19-07-1-s-ustraneniem-uyazvimosti-dopuskayushhej-podmenu-paketov"},"modified":"2020-02-03T14:36:04","modified_gmt":"2020-02-03T11:36:04","slug":"obnovlenie-openwrt-19-07-1-s-ustraneniem-uyazvimosti-dopuskayushhej-podmenu-paketov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/obnovlenie-openwrt-19-07-1-s-ustraneniem-uyazvimosti-dopuskayushhej-podmenu-paketov","title":{"rendered":"Aktualiz\u00e1cia OpenWrt 19.07.1 s odstr\u00e1nen\u00edm zranite\u013enosti umo\u017e\u0148uj\u00facej podvod s bal\u00ed\u010dkami","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Zverejnen\u00e9 opravy distrib\u00facie OpenWrt 18.06.7<\/a><\/noindex> a 19.07.1<\/a><\/noindex>, v ktor\u00fdch bola odstr\u00e1nen\u00e1 nebezpe\u010dn\u00e1 zranite\u013enos\u0165<\/a><\/noindex> (CVE-2020-7982) v spr\u00e1vci bal\u00ed\u010dkov opkg<\/a><\/noindex>, umo\u017e\u0148uj\u00faca uskuto\u010dni\u0165 MITM \u00fatok a zmeni\u0165 obsah s\u0165ahovan\u00e9ho bal\u00ed\u010dka z repozit\u00e1ra. V d\u00f4sledku chyby v kontroln\u00fdch sum\u00e1ch m\u00f4\u017ee \u00fato\u010dn\u00edk vytvori\u0165 podmienky, za ktor\u00fdch bud\u00fa ignorovan\u00e9 SHA-256 kontroln\u00e9 sumy pr\u00edtomn\u00e9 v digit\u00e1lne podp\u00edsanom indexe bal\u00ed\u010dkov, \u010do umo\u017e\u0148uje ob\u00eds\u0165 mechanizmy kontroly integrity s\u0165ahovan\u00fdch ipk zdrojov.<\/p>\n

Probl\u00e9m sa prejavuje od febru\u00e1ra 2017, po prid\u00e1n\u00ed<\/a><\/noindex> k\u00f3du, ktor\u00fd ignoruje po\u010diato\u010dn\u00e9 medzery pred kontrolnou sumou. V d\u00f4sledku chyby pri presko\u010den\u00ed medzier sa nepresunula ukazovate\u013e na poz\u00edciu v re\u0165azci a cyklus dek\u00f3dovania \u0161estn\u00e1stkov\u00e9ho re\u0165azca SHA-256 okam\u017eite vr\u00e1til riadenie a vr\u00e1til nulov\u00fa d\u013a\u017eku kontrolnej sumy. <\/p>\n

Ke\u010f\u017ee bal\u00ed\u010dkov\u00fd mana\u017e\u00e9r opkg v OpenWrt sa sp\u00fa\u0161\u0165a s pr\u00e1vami superu\u017e\u00edvate\u013ea, \u00fato\u010dn\u00edk m\u00f4\u017ee v pr\u00edpade organizovania \u00fatoku typu MITM nepozorovane upravi\u0165 ipk-bal\u00edk, s\u0165ahovan\u00fd z repozit\u00e1ra po\u010das vykon\u00e1vania pr\u00edkazu \u201eopkg install\u201c pou\u017e\u00edvate\u013eom, a umo\u017eni\u0165 vykonanie svojho k\u00f3du s pr\u00e1vami superu\u017e\u00edvate\u013ea pridan\u00edm vlastn\u00fdch spracovate\u013esk\u00fdch skriptov do bal\u00edka, ktor\u00e9 sa spustia pri in\u0161tal\u00e1cii. Aby mohol zranite\u013enos\u0165 vyu\u017ei\u0165, \u00fato\u010dn\u00edk mus\u00ed tie\u017e zabezpe\u010di\u0165 podvrhnutie spr\u00e1vneho a podp\u00edsan\u00e9ho indexu bal\u00edkov (napr\u00edklad s\u0165ahovan\u00e9ho z downloads.openwrt.org). Ve\u013ekos\u0165 upraven\u00e9ho bal\u00edka mus\u00ed zodpoveda\u0165 p\u00f4vodnej ve\u013ekosti ur\u010den\u00e9 v indexe.<\/p>\n

V situ\u00e1cii, ke\u010f je potrebn\u00e9 ob\u00eds\u0165 aktualiz\u00e1ciu celej firmv\u00e9ry, m\u00f4\u017eete aktualizova\u0165 iba spr\u00e1vcu bal\u00ed\u010dkov opkg spusten\u00edm nasleduj\u00facich pr\u00edkazov:<\/p>\n

cd \/tmp
\n opkg update
\n opkg download opkg
\n zcat .\/opkg-lists\/openwrt_base | grep -A10 \u201ePackage: opkg\u201c | grep SHA256sum
\n sha256sum .\/opkg_2020-01-25-c09fe209-1_*.ipk<\/p>\n

N\u00e1sledne je potrebn\u00e9 porovna\u0165 zobrazen\u00e9 kontroln\u00e9 sumy a ak sa zhoduj\u00fa, vykona\u0165:<\/p>\n

opkg install .\/opkg_2020-01-25-c09fe209-1_*.ipk<\/p>\n

V nov\u00fdch verzi\u00e1ch bola odstr\u00e1nen\u00e1 \u010fal\u0161ia zranite\u013enos\u0165<\/a><\/noindex> v kni\u017enici libubox<\/a><\/noindex>, ktor\u00e1 m\u00f4\u017ee vies\u0165 k prete\u010deniu vyrovn\u00e1vacej pam\u00e4te pri spracovan\u00ed vo funkcii blobmsg_format_json<\/a><\/noindex> \u0161peci\u00e1lne form\u00e1tovan\u00fdch serializovan\u00fdch bin\u00e1rnych \u00fadajov alebo \u00fadajov vo form\u00e1te JSON. Kni\u017enica sa pou\u017e\u00edva v komponentoch distrib\u00facie ako netifd, procd, ubus, rpcd a uhttpd, ako aj v bal\u00edku auc<\/a><\/noindex> (Attended sysUpgrade CLI). Prete\u010denie vyrovn\u00e1vacej pam\u00e4te nast\u00e1va pri prenose ve\u013ek\u00fdch \u010d\u00edseln\u00fdch atrib\u00fatov typu \u201edouble\u201c v blob-blockoch. Skontrolova\u0165 zranite\u013enos\u0165 syst\u00e9mu mo\u017eno vykonan\u00edm pr\u00edkazu:<\/p>\n

$ ubus call luci getFeatures \\
\n \u2018{ \u201ebanik\u201c: 00192200197600198000198100200400.1922 }\u2019<\/p>\n

Okrem odstr\u00e1nenia zranite\u013enost\u00ed a opravy nahromaden\u00fdch ch\u00fdb vo verzii OpenWrt 19.07.1 bola taktie\u017e aktualizovan\u00e1 verzia jadra Linux (z 4.14.162 na 4.14.167), vyrie\u0161en\u00e9 probl\u00e9my s v\u00fdkonom pri pou\u017e\u00edvan\u00ed frekvenci\u00ed 5GHz, bola zaveden\u00e1 podpora zariaden\u00ed Ubiquiti Rocket M Titanium, Netgear WN2500RP v1,
\n Zyxel NSA325, Netgear WNR3500 V2, Archer C6 v2, Ubiquiti EdgeRouter-X, Archer C20 v4, Archer C50 v4, Archer MR200, TL-WA801ND v5, HiWiFi HC5962, Xiaomi Mi Router 3 Pro a Netgear R6350.<\/p>\n

<\/a><\/noindex><\/p>\n

Zdroj: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430 OpenWrt 18.06.7 \u0438 19.07.1, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-7982) \u0432 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u043c \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0435 opkg, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0438\u0442\u044c MITM-\u0430\u0442\u0430\u043a\u0443 \u0438 \u043f\u043e\u0434\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u0437\u0430\u0433\u0440\u0443\u0436\u0430\u0435\u043c\u043e\u0433\u043e \u0438\u0437 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u044f \u043f\u0430\u043a\u0435\u0442\u0430. \u0418\u0437-\u0437\u0430 \u043e\u0448\u0438\u0431\u043a\u0438 \u0432 \u043a\u043e\u0434\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u044b\u0445 \u0441\u0443\u043c\u043c, \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u043c\u043e\u0436\u0435\u0442 \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u0443\u0441\u043b\u043e\u0432\u0438\u044f, \u043f\u0440\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u044b\u0435 \u0441\u0443\u043c\u043c\u044b SHA-256, \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u0432 \u0437\u0430\u0432\u0435\u0440\u0435\u043d\u043d\u043e\u043c \u0446\u0438\u0444\u0440\u043e\u0432\u043e\u0439 \u043f\u043e\u0434\u043f\u0438\u0441\u044c\u044e \u0438\u043d\u0434\u0435\u043a\u0441\u0435 \u043f\u0430\u043a\u0435\u0442\u043e\u0432, \u0431\u0443\u0434\u0443\u0442 \u0438\u0433\u043d\u043e\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u044b, \u0447\u0442\u043e \u0434\u0430\u0451\u0442 […]<\/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":[],"tags":[],"class_list":["post-40697","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Aktualiz\u00e1cia OpenWrt 19.07.1 s odstr\u00e1nen\u00edm zranite\u013enosti, ktor\u00e1 umo\u017e\u0148uje podvrhnutie bal\u00edkov | ProHoster","description":"Boli zverejnen\u00e9 opravn\u00e9 verzie distrib\u00facie OpenWrt 18.06.7 a","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/obnovlenie-openwrt-19-07-1-s-ustraneniem-uyazvimosti-dopuskayushhej-podmenu-paketov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 OpenWrt 19.07.1 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u044e\u0449\u0435\u0439 \u043f\u043e\u0434\u043c\u0435\u043d\u0443 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 | ProHoster","og:description":"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430 OpenWrt 18.06.7 \u0438","og:url":"https:\/\/prohoster.info\/sk\/blog\/obnovlenie-openwrt-19-07-1-s-ustraneniem-uyazvimosti-dopuskayushhej-podmenu-paketov","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2020-02-03T11:36:04+00:00","article:modified_time":"2020-02-03T11:36:04+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"40697","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 00:32:41","updated":"2022-09-30 04:43:23","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/40697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=40697"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/40697\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=40697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=40697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=40697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}