{"id":78493,"date":"2020-04-19T19:42:00","date_gmt":"2020-04-19T17:42:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-proksi-servere-squid-pozvolyayushhaya-obojti-ogranicheniya-dostupa"},"modified":"2020-04-19T19:42:00","modified_gmt":"2020-04-19T17:42:00","slug":"uyazvimost-v-proksi-servere-squid-pozvolyayushhaya-obojti-ogranicheniya-dostupa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/uyazvimost-v-proksi-servere-squid-pozvolyayushhaya-obojti-ogranicheniya-dostupa","title":{"rendered":"Sicherheitsanf\u00e4lligkeit im Proxy-Server Squid, die den Zugriffsbeschr\u00e4nkungen entkommt","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/squid-announce@lists.squid-cache.org\/msg00107.html\">Enth\u00fcllt<\/a><\/noindex> Information \u00fcber Schwachstellen im Proxy-Server <noindex><a rel=\"nofollow\" href=\"http:\/\/www.squid-cache.org\/\">Squid<\/a><\/noindex>, die stillschweigend bereits im letzten Jahr mit der Ver\u00f6ffentlichung von Squid 4.8 behoben wurden. Die Probleme bestehen im Code der Verarbeitung des Blocks &#171;@&#187; am Anfang der URL (&#171;user@host&#187;) und erm\u00f6glichen es, die Zugriffsbeschr\u00e4nkungen zu umgehen, Cache-Inhalte zu manipulieren und Angriffe durch Cross-Site-Scripting durchzuf\u00fchren.<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"http:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2019-12524\">CVE-2019-12524<\/a><\/noindex> &#8212; Der Kunde kann mithilfe einer speziell gestalteten URL die durch die Direktive url_regex festgelegten Regeln umgehen und vertrauliche Informationen \u00fcber den Proxy und den verarbeiteten Datenverkehr erhalten (Zugriff auf die Cache-Manager-Schnittstelle).\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"http:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2019-12520\">CVE-2019-12520<\/a><\/noindex> &#8212; Durch die Manipulation der Benutzernamen-Daten in der URL kann erreicht werden, dass gef\u00e4lschte Inhalte f\u00fcr eine bestimmte Seite im Cache gespeichert werden, was beispielsweise genutzt werden kann, um das eigene JavaScript auf anderen Websites auszuf\u00fchren.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52765\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u043f\u0440\u043e\u043a\u0441\u0438-\u0441\u0435\u0440\u0432\u0435\u0440\u0435 Squid, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0431\u0435\u0437 \u043b\u0438\u0448\u043d\u0435\u0439 \u043e\u0433\u043b\u0430\u0441\u043a\u0438 \u0431\u044b\u043b\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0435\u0449\u0451 \u0432 \u043f\u0440\u043e\u0448\u043b\u043e\u043c \u0433\u043e\u0434\u0443 \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 Squid 4.8. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0442 \u0432 \u043a\u043e\u0434\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0431\u043b\u043e\u043a\u0430 &#171;@&#187; \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 URL (&#171;user@host&#187;) \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043e\u0431\u043e\u0439\u0442\u0438 \u043f\u0440\u0430\u0432\u0438\u043b\u0430 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430, \u043e\u0442\u0440\u0430\u0432\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043a\u044d\u0448\u0430 \u0438 \u0441\u043e\u0432\u0435\u0440\u0448\u0430\u0442\u044c \u0430\u0442\u0430\u043a\u0443 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043c\u0435\u0436\u0441\u0430\u0439\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u043a\u0440\u0438\u043f\u0442\u0438\u043d\u0433\u0430. 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