{"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\/de\/blog\/openwrt-19-07-1","title":{"rendered":"OpenWrt 19.07.1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><a rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/images\/18933\/original.png\" itemprop=\"contentURL\"><br \/>\n      <img decoding=\"async\" alt=\"OpenWrt 19.07.1\" src=\"\/wp-content\/uploads\/2020\/02\/8383caa7e1555731c336d42797b1288a.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>    <\/a><\/p>\n<p><noindex>      <noindex><\/p>\n<p>Es wurden Versionen des OpenWrt-Distributions ver\u00f6ffentlicht <a rel=\"nofollow\" href=\"https:\/\/lists.infradead.org\/pipermail\/openwrt-devel\/2020-January\/021541.html\">18.06.7<\/a> und <a rel=\"nofollow\" href=\"https:\/\/lists.infradead.org\/pipermail\/openwrt-devel\/2020-January\/021543.html\">19.07.1<\/a>, in denen <a rel=\"nofollow\" href=\"https:\/\/lists.infradead.org\/pipermail\/openwrt-devel\/2020-January\/021544.html\">eine Schwachstelle<\/a> CVE-2020-7982 im Paketmanager opkg behoben wurde, wodurch es m\u00f6glich war, einen MITM-Angriff durchzuf\u00fchren und den Inhalt des aus dem Repository geladenen Pakets zu ersetzen. Aufgrund eines Fehlers in der \u00dcberpr\u00fcfung des CRC konnte der Angreifer die SHA-256-Checksummen des Pakets ignorieren, was erm\u00f6glichte, die Integrit\u00e4tspr\u00fcfungen der heruntergeladenen ipk-Ressourcen zu umgehen.<\/p>\n<p><\/noindex><noindex><\/p>\n<p>Das Problem besteht seit Februar 2017, nachdem der Code zum Ignorieren von f\u00fchrenden Leerzeichen vor der Pr\u00fcfnummer hinzugef\u00fcgt wurde. Aufgrund des Fehlers, der die Leerzeichen \u00fcbersprang, wurde der Zeiger auf der Position in der Zeichenfolge nicht verschoben, und die Schleife zum Dekodieren der hexadezimalen SHA-256-Sequenz gab sofort die Kontrolle zur\u00fcck und gab die Pr\u00fcfnummer mit null L\u00e4nge zur\u00fcck.<\/p>\n<p>Da der Paketmanager opkg mit Root-Rechten gestartet wurde, konnte ein Angreifer den Inhalt des ipk-Pakets w\u00e4hrend der Durchf\u00fchrung eines MITM-Angriffs, der aus einem Repository bei Ausf\u00fchrung des Befehls &#171;opkg install&#187; heruntergeladen wurde, ver\u00e4ndern und die Ausf\u00fchrung seines Codes mit Root-Rechten durch das Hinzuf\u00fcgen eigener Installationsskripte im Paket organisieren. Um die Schwachstelle auszunutzen, muss der Angreifer auch den Paketindex manipulieren (z. B. den von downloads.openwrt.org). Die Gr\u00f6\u00dfe des ver\u00e4nderten Pakets muss mit der urspr\u00fcnglichen \u00fcbereinstimmen, die im Index angegeben ist.<\/p>\n<p>In neuen Versionen wurde auch ein weiteres Problem behoben <a rel=\"nofollow\" href=\"https:\/\/lists.infradead.org\/pipermail\/openwrt-devel\/2020-January\/021545.html\">eine Schwachstelle<\/a> in der Bibliothek libubox, die zu einem Puffer\u00fcberlauf f\u00fchren kann, wenn speziell formatierte serialisierte Bin\u00e4rdaten oder JSON-formatierte Daten in der Funktion blobmsg_format_json verarbeitet werden. <\/p>\n<p><\/noindex><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.linux.org.ru\/news\/linux-general\/15505380\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 [&hellip;]<\/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<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/de\/blog\/openwrt-19-07-1\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"de_DE\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 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