{"id":86563,"date":"2020-06-27T01:42:01","date_gmt":"2020-06-26T23:42:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-curl-7-71-0-s-ustraneniem-dvuh-uyazvimostej"},"modified":"2020-06-27T01:42:01","modified_gmt":"2020-06-26T23:42:01","slug":"vypusk-curl-7-71-0-s-ustraneniem-dvuh-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/vypusk-curl-7-71-0-s-ustraneniem-dvuh-uyazvimostej","title":{"rendered":"Curl 7.71.0 har sl\u00e4ppts med \u00e5tg\u00e4rder mot tv\u00e5 s\u00e4kerhetsbrister.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/mail\/archive-2020-06\/0055.html\">Tillg\u00e4nglig<\/a><\/noindex> ny version av verktyget f\u00f6r att ta emot och skicka data \u00f6ver n\u00e4tverket - <noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/\">curl 7.71.0<\/a><\/noindex>, som ger m\u00f6jlighet till flexibel konstruktion av f\u00f6rfr\u00e5gningar med angivande av parametrar som cookie, user_agent, referer och andra valfria rubriker. cURL st\u00f6der HTTP, HTTPS, HTTP\/2.0, HTTP\/3, SMTP, IMAP, POP3, Telnet, FTP, LDAP, RTSP, RTMP och andra n\u00e4tverksprotokoll. Samtidigt sl\u00e4pptes en uppdatering av det parallellt utvecklade biblioteket libcurl, som tillhandah\u00e5ller ett API f\u00f6r att anv\u00e4nda alla curl-funktioner i program p\u00e5 spr\u00e5k som C, Perl, PHP, Python. <\/p>\n<p>I det senaste numret har alternativet &#171;&#8212;retry-all-errors&#187; lagts till f\u00f6r att g\u00f6ra om f\u00f6rs\u00f6k att utf\u00f6ra operationer vid uppkomsten av eventuella fel, och tv\u00e5 s\u00e5rbarheter har \u00e5tg\u00e4rdats:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/06\/24\/2\">S\u00e5rbarhet<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/docs\/CVE-2020-8177.html)\">CVE-2020-8177<\/a><\/noindex> det m\u00f6jligg\u00f6r skrivning av en lokal fil i systemet n\u00e4r man interagerar med en kontrollerad angreppssserver. Problemet uppst\u00e5r endast vid samtidig anv\u00e4ndning av alternativen &#171;-J&#187; (&#171;&#8212;remote-header-name&#187;) och &#171;-i&#187; (&#171;&#8212;head&#187;). Alternativet &#171;-J&#187; g\u00f6r det m\u00f6jligt att spara filen med det namn som anges i headern<br \/>\n&#171;Content-Disposition&#187;. Om en fil med det namnet redan finns, v\u00e4grar programmet curl normalt att utf\u00f6ra skrivning, men med alternativet &#171;-i&#187; bryts logiken f\u00f6r kontroll och filen skrivs \u00f6ver (kontrollen sker vid svarskroppens mottagande, men med alternativet &#171;-i&#187; visas f\u00f6rst HTTP-headerna och de hinner sparas innan behandling av kroppens svar inleds). Endast HTTP-headerna skrivs till filen, men servern kan ist\u00e4llet skicka godtyckliga data som ocks\u00e5 kommer att sparas.<\/p>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/06\/24\/1\">S\u00e5rbarhet<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/docs\/CVE-2020-8169.html\">CVE-2020-8169<\/a><\/noindex>  kan leda till l\u00e4ckage p\u00e5 DNS-servern av vissa \u00e5tkomstl\u00f6senord till webbplatsen (Basic, Digest, NTLM osv.). N\u00e4r symbolen &#171;@&#187; anv\u00e4nds i l\u00f6senordet, vilket ocks\u00e5 anv\u00e4nds som avgr\u00e4nsare f\u00f6r l\u00f6senord i URL:en, kommer curl vid en HTTP-omdirigering att skicka delen av l\u00f6senordet efter &#171;@&#187; tillsammans med dom\u00e4nen f\u00f6r att best\u00e4mma namnet. Till exempel, om l\u00f6senordet &#171;passw@rd123&#187; och anv\u00e4ndarnamnet &#171;dan&#187; anges, kommer curl att generera URL &#171;https:\/\/dan:passw@rd123@example.com\/path&#187; ist\u00e4llet f\u00f6r &#171;https:\/\/dan:passwrd123@example.com\/path&#187; och skicka en f\u00f6rfr\u00e5gan f\u00f6r att l\u00f6sa v\u00e4rden &#171;rd123@example.com&#187; ist\u00e4llet f\u00f6r &#171;example.com&#187;.\n<p>Problemet uppst\u00e5r n\u00e4r st\u00f6d f\u00f6r relativa HTTP-omdirigeringar aktiveras (de st\u00e4ngs av med CURLOPT_FOLLOWLOCATION). Vid anv\u00e4ndning av traditionell DNS kan DNS-leverant\u00f6ren och en angripare som kan avlyssna det transitn\u00e4tverkstrafiken f\u00e5 information om delar av l\u00f6senordet (\u00e4ven om den ursprungliga beg\u00e4ran var via HTTPS, eftersom DNS-trafik inte \u00e4r krypterad). Med anv\u00e4ndning av DNS-over-HTTPS (DoH) begr\u00e4nsas l\u00e4ckaget till DoH-operat\u00f6ren.<\/p>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53239\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u043e \u0441\u0435\u0442\u0438 &#8212; curl 7.71.0, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0433\u0438\u0431\u043a\u043e\u0433\u043e \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u0441 \u0437\u0430\u0434\u0430\u043d\u0438\u0435\u043c \u0442\u0430\u043a\u0438\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432, \u043a\u0430\u043a cookie, user_agent, referer \u0438 \u043b\u044e\u0431\u044b\u0445 \u0434\u0440\u0443\u0433\u0438\u0445 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u043e\u0432. cURL \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 HTTP, HTTPS, HTTP\/2.0, HTTP\/3, SMTP, IMAP, POP3, Telnet, FTP, LDAP, RTSP, RTMP \u0438 \u0434\u0440\u0443\u0433\u0438\u0435 \u0441\u0435\u0442\u0435\u0432\u044b\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u044b. \u041e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u0432\u044b\u0448\u043b\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u044c\u043d\u043e \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 [&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-86563","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=\"\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 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