{"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\/hr\/blog\/news\/obnovlenie-git-s-ustraneniem-eshhyo-odnoj-uyazvimosti","title":{"rendered":"A\u017euriranje Git-a uklanja jo\u0161 jednu ranjivost","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Objavljene<\/a><\/noindex> ispravke distribucijskog sustava za upravljanje izvorom 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 i 2.17.5, u kojima je ispravljena ranljivost<\/a><\/noindex> (CVE-2020-11008<\/a><\/noindex>), podsje\u0107aju\u0107i problem<\/a><\/noindex>, otklonjena pro\u0161log tjedna. Nova ranjivost tako\u0111er se odnosi na obradu «credential.helper» i iskori\u0161tava se prilikom prijenosa posebno formatirane URL-adrese koja sadr\u017ei znak novog reda, prazni host ili neodre\u0111enu shemu zahtjeva. Prilikom obrade takvog URL-a, credential.helper \u0161alje informacije o vjerodajnicama koje nisu u skladu s tra\u017eenim protokolom ili hostom kojem se obra\u0107a.<\/p>\n

Za razliku od prethodnog problema, kada se iskori\u0161tava nova ranjivost, napada\u010d ne mo\u017ee izravno kontrolirati host s kojeg \u0107e se prenijeti strane vjerodajnice. To koje \u0107e se vjerodajnice procuriti ovisi o karakteristikama obrade nedostaju\u0107e varijable «host» u credential.helper. Bit problema je u tome \u0161to mnogi obrtnici credential.helper interpretiraju prazna polja u URL-u kao upute za primjenu svih vjerodajnica na trenutni zahtjev. Kao rezultat, credential.helper mo\u017ee poslati vjerodajnice spremljene za drugi server na server napada\u010da naveden u URL-u. <\/p>\n

Problem se pojavljuje prilikom izvo\u0111enja operacija poput «git clone» i «git fetch», no najopasniji je prilikom obrade podmodula \u2014 prilikom izvo\u0111enja «git submodule update» automatski se obra\u0111uju URL-ovi navedeni u .gitmodules datoteci iz repozitorija. Kao zaobilazno rje\u0161enje za blokiranje problema, preporu\u010duje se<\/a><\/noindex> ne koristiti credential.helper prilikom pristupa javnim repozitorijima i ne primjenjivati «git clone» u «—recurse-submodules» modu s provjerenim repozitorijima. <\/p>\n

Predlo\u017eene ispravke u novim izdanjima Gita ispravka<\/a><\/noindex> onemogu\u0107ava poziv credential.helper za URL-ove koji sadr\u017ee neprikladne vrijednosti<\/a><\/noindex> (na primjer, kada se navedu tri kosa crta umjesto dvije — «http:\/\/host» ili bez sheme protokola — «http::ftp.example.com\/»). Problem zahva\u0107a obrtnike store (ugra\u0111eno spremi\u0161te vjerodajnica Git), cache (ugra\u0111eni cache unesene vjerodajnice) i osxkeychain (spremi\u0161te za macOS). Obrtnik Git Credential Manager (spremi\u0161te za Windows) nije podlo\u017ean ranjivosti.<\/p>\n

Pra\u0107enje izdanja a\u017euriranja paketa u distribucijama mo\u017ee se provjeriti na stranicama 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

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

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