{"id":78706,"date":"2020-04-21T13:42:05","date_gmt":"2020-04-21T11:42:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti"},"modified":"2020-04-21T13:42:05","modified_gmt":"2020-04-21T11:42:05","slug":"obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti","title":{"rendered":"Git-update met het verhelpen van nog een kwetsbaarheid","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2020\/4\/20\/1252\">Gepubliceerd<\/a><\/noindex> correctieve versies van het gedistribueerde versiebeheersysteem Git 2.26.2, 2.25.4, 2.24.3, 2.23.3, 2.22.4, 2.21.3, 2.20.4, 2.19.5, 2.18.4 en 2.17.5, waarin is verholpen <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/git\/git\/security\/advisories\/GHSA-hjc9-x69f-jqj7\">kwetsbaarheid<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-11008\">CVE-2020-11008<\/a><\/noindex>), ter herinnering aan <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52734\">een probleem<\/a><\/noindex>, opgelost vorige week. De nieuwe kwetsbaarheid heeft ook invloed op de handlers &#171;credential.helper&#187; en wordt ge\u00ebxploiteerd bij het verzenden van een speciaal opgemaakt URL met daarin een nieuwe regel, een lege host of een ontbrekende aanvraagstructuur. Bij het verwerken van een dergelijke URL verzendt credential.helper informatie over inloggegevens die niet overeenkomen met het aangevraagde protocol of de host, waar contact mee wordt opgenomen.<\/p>\n<p>In tegenstelling tot het vorige probleem kan de aanvaller bij de exploitatie van de nieuwe kwetsbaarheid de host waaruit de inloggegevens worden verzonden niet rechtstreeks controleren. Welke inloggegevens uitlekken, hangt af van de manier waarop het ontbreken van de parameter &#171;host&#187; in credential.helper wordt verwerkt. Het probleem is dat lege velden in de URL door veel credential.helper-handlers worden ge\u00efnterpreteerd als instructies om alle inloggegevens die voorlopig zijn opgeslagen, toe te passen op de huidige aanvraag. Zo kan credential.helper inloggegevens naar de server van de aanvaller sturen die in de URL is opgegeven, terwijl deze zijn opgeslagen voor een andere server. <\/p>\n<p>Het probleem doet zich voor bij het uitvoeren van operaties zoals &#171;git clone&#187; en &#171;git fetch&#187;, maar is het gevaarlijkst bij het verwerken van submodules \u2014 bij het uitvoeren van &#171;git submodule update&#187; worden automatisch de URL's verwerkt die zijn opgegeven in het .gitmodules-bestand uit de repository. Als tijdelijke oplossing om het probleem te blokkeren <noindex><a rel=\"nofollow\" href=\"https:\/\/github.blog\/2020-04-20-git-credential-helper-vulnerability-announced-update\/\">is het aanbevolen<\/a><\/noindex> gebruik credential.helper niet bij toegang tot openbare repositories en pas &#171;git clone&#187; niet in de &#171;&#8212;recurse-submodules&#187; modus toe met onbetrouwbare repositories. <\/p>\n<p>Voorstellen in de nieuwe versies van Git <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/git\/git\/compare\/v2.17.4...v2.17.5\">, maar deze is nog niet goedgekeurd. Om terug te keren naar de vorige stabiele versie (OpenSSL 1.1.0h) kun je de volgende commando's uitvoeren:<\/a><\/noindex> verbieden het aanroepen van credential.helper voor URL's die bevatten <noindex><a rel=\"nofollow\" href=\"https:\/\/git.kernel.org\/pub\/scm\/git\/git.git\/commit\/?id=fe29a9b7b0236d3d45c254965580d6aff7fa8504\">onaanvaardbare waarden<\/a><\/noindex> (bijvoorbeeld door drie schuine strepen in plaats van twee op te geven \u2014 &#171;http:\/\/host&#187; of zonder protocolstructuur \u2014 &#171;http::ftp.example.com\/&#187;). Het probleem heeft invloed op de handlers store (ingebouwde opslag van Git-inloggegevens), cache (ingebouwde cache van ingevoerde inloggegevens) en osxkeychain (opslag voor macOS). De Git Credential Manager (opslag voor Windows) is niet kwetsbaar voor deze kwetsbaarheid.<\/p>\n<p>De voortgang van updates voor pakketten in distributies kan worden gevolgd op de pagina's <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2020-11008\">Debian<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/people.canonical.com\/~ubuntu-security\/cve\/2020\/CVE-2020-11008.html\">Ubuntu<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2020-11008\">RHEL<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2020-11008\">SUSE\/openSUSE<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bodhi.fedoraproject.org\/updates\/?releases=F31&#038;type=security\">Fedora<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/security.archlinux.org\/CVE-2020-11008\">Arch<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"http:\/\/packages.altlinux.org\/git\">ALT<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"http:\/\/www.vuxml.org\/freebsd\/\">FreeBSD<\/a><\/noindex>.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Bron: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52774\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u043c\u0438 \u0442\u0435\u043a\u0441\u0442\u0430\u043c\u0438 Git 2.26.2, 2.25.4, 2.24.3, 2.23.3, 2.22.4, 2.21.3, 2.20.4, 2.19.5, 2.18.4 \u0438 2.17.5, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-11008), \u043d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u044e\u0449\u0430\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443, \u0443\u0441\u0442\u0440\u0430\u043d\u0451\u043d\u043d\u0443\u044e \u043d\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u043d\u0435\u0434\u0435\u043b\u0435. \u041d\u043e\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0442\u0430\u043a\u0436\u0435 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 &#171;credential.helper&#187; \u0438 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e URL, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0435\u0433\u043e \u0441\u0438\u043c\u0432\u043e\u043b \u043d\u043e\u0432\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0438, \u043f\u0443\u0441\u0442\u043e\u0439 \u0445\u043e\u0441\u0442 \u0438\u043b\u0438 \u043d\u0435 \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u0443\u044e \u0441\u0445\u0435\u043c\u0443 \u0437\u0430\u043f\u0440\u043e\u0441\u0430. [&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-78706","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u043c\u0438 \u0442\u0435\u043a\u0441\u0442\u0430\u043c\u0438 Git 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