{"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\/ro\/blog\/news\/obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti","title":{"rendered":"Actualizarea Git cu remedierea unei noi vulnerabilit\u0103\u021bi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Publicate<\/a><\/noindex> versiunile corective ale sistemului distribuit de control al versiunilor 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 \u0219i 2.17.5, \u00een care a fost remediat\u0103 vulnerabilitatea<\/a><\/noindex> (CVE-2020-11008<\/a><\/noindex>), similar\u0103 problema<\/a><\/noindex>, rezolvat\u0103 s\u0103pt\u0103m\u00e2na trecut\u0103. Noua vulnerabilitate afecteaz\u0103 de asemenea handlerii \u201ecredential.helper\u201d \u0219i este exploatat\u0103 prin transmiterea unui URL format special, care con\u021bine un caracter de linie nou\u0103, un host gol sau o schem\u0103 de cerere nespecificat\u0103. Atunci c\u00e2nd se proceseaz\u0103 un astfel de URL, credential.helper trimite informa\u021bii de acreditive care nu se potrivesc cu protocolul sau hostul solicitat.<\/p>\n

Spre deosebire de problema anterioar\u0103, \u00een cazul exploat\u0103rii noii vulnerabilit\u0103\u021bi, atacatorul nu poate controla direct hostul de la care vor fi transmise acreditivele altora. Ce acreditive vor fi compromise depinde de modul \u00een care este procesat parametru lips\u0103 \u201ehost\u201d \u00een credential.helper. Problema este c\u0103 c\u00e2mpurile goale din URL sunt interpretate de mul\u021bi handleri credential.helper ca instruc\u021biuni de aplicare a oric\u0103ror acreditive curente la cererea actual\u0103. Astfel, credential.helper poate trimite pe serverul specificat \u00een URL acreditivele salvate pentru un alt server. <\/p>\n

Problema se manifest\u0103 la efectuarea unor opera\u021biuni precum \u201egit clone\u201d \u0219i \u201egit fetch\u201d, dar este cea mai periculoas\u0103 la procesarea submodulelor \u2014 la executarea \u201egit submodule update\u201d URL-urile specificate \u00een fi\u0219ierul .gitmodules din repository sunt procesate automat. Ca solu\u021bie pentru blocarea problemei se recomand\u0103<\/a><\/noindex> nu utiliza\u021bi credential.helper atunci c\u00e2nd accesa\u021bi repository-uri publice \u0219i nu aplica\u021bi \u201egit clone\u201d \u00een modul \u201e--recurse-submodules\u201d cu repository-uri nesigure. <\/p>\n

Modific\u0103rile propuse \u00een noile versiuni Git un fix<\/a><\/noindex> interzic apelarea credential.helper pentru URL-uri care con\u021bin valori neadmisibile<\/a><\/noindex> (de exemplu, prin specificarea a trei slash-uri \u00een loc de dou\u0103 \u2014 \u201ehttp:\/\/\/host\u201d sau f\u0103r\u0103 schem\u0103 de protocol \u2014 \u201ehttp::ftp.example.com\/\u201d). Problema afecteaz\u0103 handlerii store (stocarea \u00eencorporat\u0103 a acreditivelor Git), cache (cache-ul \u00eencorporat al acreditivelor introduse) \u0219i osxkeychain (stocarea pentru macOS). Handlerul Git Credential Manager (stocarea pentru Windows) nu este vulnerabil.<\/p>\n

Monitorizarea actualiz\u0103rilor pachetelor \u00een distribu\u021biile poate fi efectuat\u0103 pe paginile Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch<\/a><\/noindex>, ALT<\/a><\/noindex>, FreeBSD<\/a><\/noindex>.<\/p>\n

<\/a><\/noindex><\/p>\n

Sursa: opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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 «credential.helper» \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. […]<\/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\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Actualizarea Git cu remedierea unei alte vulnerabilit\u0103\u021bi | ProHoster","description":"Au fost publicate versiunile corective ale sistemului distribuit de gestionare a codului surs\u0103 Git 2.26.2, 2.25.4, 2.24.3, 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