{"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\/es\/blog\/news\/vypusk-curl-7-71-0-s-ustraneniem-dvuh-uyazvimostej","title":{"rendered":"Lanzamiento de curl 7.71.0 con la correcci\u00f3n de dos vulnerabilidades","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\">Disponible<\/a><\/noindex> nueva versi\u00f3n de la herramienta para la recepci\u00f3n y env\u00edo de datos a trav\u00e9s de la red \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/\">curl 7.71.0<\/a><\/noindex>, que proporciona la posibilidad de configurar din\u00e1micamente la solicitud especificando par\u00e1metros como cookie, user_agent, referer y otros encabezados. cURL soporta HTTP, HTTPS, HTTP\/2.0, HTTP\/3, SMTP, IMAP, POP3, Telnet, FTP, LDAP, RTSP, RTMP y otros protocolos de red. Tambi\u00e9n se lanz\u00f3 una actualizaci\u00f3n de la biblioteca libcurl, que proporciona una API para acceder a todas las funciones de curl en programas en lenguajes como C, Perl, PHP, Python. <\/p>\n<p>En esta nueva versi\u00f3n se ha agregado la opci\u00f3n \u00ab\u2014retry-all-errors\u00bb para realizar reintentos en las operaciones ante cualquier error y se han solucionado dos vulnerabilidades:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/06\/24\/2\">Vulnerabilidad<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/docs\/CVE-2020-8177.html)\">CVE-2020-8177<\/a><\/noindex> permite sobrescribir un archivo local en el sistema al conectarse a un servidor controlado por un atacante. El problema se presenta solo cuando se utilizan simult\u00e1neamente las opciones \u00ab-J\u00bb (\u00ab\u2014remote-header-name\u00bb) y \u00ab-i\u00bb (\u00ab\u2014head\u00bb). La opci\u00f3n \u00ab-J\u00bb permite guardar el archivo con el nombre especificado en el encabezado<br \/>\n\u00abContent-Disposition\u00bb. Si ya existe un archivo con ese nombre, el programa curl normalmente se niega a sobrescribir, pero si se activa la opci\u00f3n \u00ab-i\u00bb, la l\u00f3gica de verificaci\u00f3n se ve comprometida y el archivo se sobrescribe (la verificaci\u00f3n se realiza en la fase de recepci\u00f3n del cuerpo de la respuesta, pero con la opci\u00f3n \u00ab-i\u00bb se imprimen primero los encabezados HTTP y estos se guardan antes de empezar a procesar el cuerpo de la respuesta). Solo se guardan los encabezados HTTP, pero el servidor puede devolver datos arbitrarios en lugar de los encabezados y estos ser\u00e1n grabados.<\/p>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2020\/06\/24\/1\">Vulnerabilidad<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/curl.haxx.se\/docs\/CVE-2020-8169.html\">CVE-2020-8169<\/a><\/noindex>  puede llevar a la fuga en el servidor DNS de parte de algunas contrase\u00f1as de acceso al sitio (Basic, Digest, NTLM, etc.). Al usar el s\u00edmbolo \u00ab@\u00bb en la contrase\u00f1a, que tambi\u00e9n se utiliza como separador de contrase\u00f1as en la URL, cuando se activa la redirecci\u00f3n HTTP, curl enviar\u00e1 parte de la contrase\u00f1a despu\u00e9s del s\u00edmbolo \u00ab@\u00bb junto con el dominio para determinar el nombre. Por ejemplo, al especificar la contrase\u00f1a \u00abpassw@rd123\u00bb y el nombre de usuario \u00abdan\u00bb, curl generar\u00e1 la URL \u00abhttps:\/\/dan:passw@rd123@example.com\/path\u00bb en lugar de \u00abhttps:\/\/dan:passwrd123@example.com\/path\u00bb y enviar\u00e1 la solicitud para resolver el host \u00abrd123@example.com\u00bb en lugar de \u00abexample.com\u00bb.\n<p>El problema se presenta al activar el soporte para redirecciones HTTP relativas (desactivadas mediante CURLOPT_FOLLOWLOCATION). En caso de utilizar DNS tradicionales, el proveedor de DNS y un atacante con capacidad para interceptar el tr\u00e1fico de red en tr\u00e1nsito pueden obtener parte de la contrase\u00f1a (incluso si la solicitud original se realiz\u00f3 a trav\u00e9s de HTTPS, ya que el tr\u00e1fico DNS no est\u00e1 cifrado). Al aplicar DNS-over-HTTPS (DoH), la filtraci\u00f3n se limita al operador de DoH.<\/p>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fuente: <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 5.0.2 - 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 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u043e \u0441\u0435\u0442\u0438 -\" 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