{"id":41185,"date":"2020-02-06T14:41:55","date_gmt":"2020-02-06T11:41:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/openwrt-19-07-1"},"modified":"2020-02-06T14:41:55","modified_gmt":"2020-02-06T11:41:55","slug":"openwrt-19-07-1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/openwrt-19-07-1","title":{"rendered":"OpenWrt 19.07.1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"


\n \"OpenWrt<\/p>\n

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

<\/p>\n

Au fost lansate versiunile distribu\u021biei OpenWrt 18.06.7<\/a> \u0219i 19.07.1<\/a>, \u00een care a fost corectat\u0103 vulnerabilitatea<\/a> CVE-2020-7982 \u00een managerul de pachete opkg, prin care putea fi efectuat un atac MITM \u0219i con\u021binutul pachetului desc\u0103rcat din depozit putea fi \u00eenlocuit. Din cauza unei erori \u00een codul de verificare a sumelor de control, atacatorul putea ignora sumele de control SHA-256 din pachet, permi\u021b\u00e2ndu-i s\u0103 evite mecanismele de verificare a integrit\u0103\u021bii resurselor ipk desc\u0103rcate.<\/p>\n

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

Problema exist\u0103 din februarie 2017, dup\u0103 ce a fost ad\u0103ugat codul pentru a ignora spa\u021biile de la \u00eenceput care preced suma de control. Din cauza unei erori la s\u0103rirea spa\u021biilor, indicatorul nu s-a mutat la pozi\u021bia \u00een \u0219ir \u0219i ciclul de decodare a secven\u021bei hexadecimale SHA-256 returna imediat controlul, oferind o sum\u0103 de control de lungime zero.<\/p>\n

Din cauza c\u0103 managerul de pachete opkg era rulat din contul root, un atacator putea modifica con\u021binutul unui pachet ipk \u00een timpul unui atac MITM, fiind desc\u0103rcat din repository \u00een timpul execut\u0103rii comenzii «opkg install», \u0219i astfel putea executa codul s\u0103u cu privilegii de root prin ad\u0103ugarea propriilor scripturi de gestionare \u00een pachet, care erau apelate la instalare. Pentru a profita de vulnerabilitate, atacatorul trebuia, de asemenea, s\u0103 modifice indexul pachetelor (de exemplu, cel livrat de downloads.openwrt.org). Dimensiunea pachetului modificat trebuia s\u0103 corespund\u0103 cu cea original\u0103 din index.<\/p>\n

\u00cen noile versiuni a fost anche eliminat\u0103 o alt\u0103 vulnerabilitatea<\/a> \u00een biblioteca libubox, care poate duce la o suprascriere a buffer-ului atunci c\u00e2nd se proceseaz\u0103 \u00een func\u021bia blobmsg_format_json date binare serializate special sau date \u00een format JSON. <\/p>\n

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

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

\u0412\u044b\u043f\u0443\u0449\u0435\u043d\u044b \u0432\u0435\u0440\u0441\u0438\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 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c CVE-2020-7982 \u0432 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0435 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 opkg, \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043c\u043e\u0436\u043d\u043e \u0431\u044b\u043b\u043e \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0438\u0442\u044c MITM-\u0430\u0442\u0430\u043a\u0443 \u0438 \u0437\u0430\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\u0433 \u043f\u0440\u043e\u0438\u0433\u043d\u043e\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u044b\u0435 \u0441\u0443\u043c\u043c\u044b SHA-256 \u0438\u0437 \u043f\u0430\u043a\u0435\u0442\u0430, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u043b\u043e \u043e\u0431\u043e\u0439\u0442\u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u0438 \u0437\u0430\u0433\u0440\u0443\u0436\u0430\u0435\u043c\u044b\u0445 ipk-\u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":41186,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-41185","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\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\n","aioseo_head_json":{"title":"\ud83e\udd47OpenWrt 19.07.1 | 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