{"id":184239,"date":"2026-11-12T11:41:56","date_gmt":"2026-11-12T09:41:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/uyazvimost-v-git-dopuskayushhaya-vypolnenie-koda-pri-klonirovanii-iz-vredonosnogo-git-repozitoriya"},"modified":"2026-11-12T11:42:03","modified_gmt":"2026-11-12T09:42:03","slug":"git-vulnerability-allows-code-execution-when-cloning-a-malicious-git-repository","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/git-vulnerability-allows-code-execution-when-cloning-a-malicious-git-repository","title":{"rendered":"Zranite\u013enos\u0165 v Gite, ktor\u00e1 umo\u017e\u0148uje vykonanie k\u00f3du pri klonovan\u00ed z \u0161kodliv\u00e9ho Git repozit\u00e1ra","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Boli uverejnen\u00e9 opravn\u00e9 verzie distribuovan\u00e9ho syst\u00e9mu spr\u00e1vy zdrojov\u00e9ho k\u00f3du Git 2.56.1, 2.55.1, 2.54.1, 2.53.1, 2.52.1, 2.51.3 a 2.50.2, v ktor\u00fdch bolo odstr\u00e1nen\u00fdch 6 zranite\u013enost\u00ed. Najnebezpe\u010dnej\u0161ia zranite\u013enos\u0165 (CVE-2026-111760) umo\u017e\u0148uje vykonanie k\u00f3du pri pou\u017eit\u00ed pr\u00edkazu &#171;git clone&#187; v re\u017eime &#171;&#8212;recurse-submodules&#187; s repozit\u00e1rmi kontrolovan\u00fdmi \u00fato\u010dn\u00edkom.<\/p>\n<p>Probl\u00e9m je sp\u00f4soben\u00fd t\u00fdm, \u017ee d\u013a\u017eka z\u00e1znamu s menom v indexe sa vypo\u010d\u00edtava pomocou 32-bitov\u00e9ho cel\u00e9ho \u010d\u00edsla. Pri prenose ve\u013emi dlh\u00e9ho mena ako &#171;.git\/&#8230;.&#187; doch\u00e1dza k celo\u010d\u00edseln\u00e9mu prete\u010deniu a \u00fato\u010dn\u00edk m\u00f4\u017ee dosiahnu\u0165 vypo\u010d\u00edtanie d\u013a\u017eky rovnaj\u00facej sa 4 bajtom. V d\u00f4sledku toho, pri kontrole hodnoty sa pou\u017e\u00edvaj\u00fa skuto\u010dn\u00e9 \u00fadaje, a pri vykon\u00e1van\u00ed oper\u00e1cie skr\u00e1ten\u00e1 verzia &#171;.git&#187;, \u010do umo\u017e\u0148uje \u00fato\u010dn\u00edkovi nahradi\u0165 s\u00fabor &#171;.git&#187; v submodule symbolick\u00fdm odkazom, ktor\u00fd ukazuje na adres\u00e1r s nastaveniami a hookmi.<\/p>\n<p>\u010eal\u0161ie zranite\u013enosti:<\/p>\n<ul>\n<li class=\"l\"> CVE-2026-113408 &#8212; prekro\u010denie hranice adres\u00e1ra refs\/ cez prenos symbolick\u00e9ho odkazu so hodnotou &#171;refs\/heads\/....\/....\/....\/TARGET&#187; ako vetvy HEAD pri klonovan\u00ed pr\u00e1zdneho repozit\u00e1ra cez protokol Git v2. Pri n\u00e1slednom vykon\u00e1van\u00ed &#171;git commit&#187; bude vytvoren\u00fd s\u00fabor TARGET v kore\u0148ovom adres\u00e1ri repozit\u00e1ra, \u010do sa d\u00e1 vyu\u017ei\u0165 na prep\u00edsanie s\u00faborov v repozit\u00e1ri a organizovanie vykon\u00e1vania k\u00f3du.\n<li class=\"l\"> CVE-2026-114467 &#8212; prete\u010denie z\u00e1sobn\u00edka pri odstra\u0148ovan\u00ed GPG podpisov, ktor\u00e9 potenci\u00e1lne m\u00f4\u017ee vies\u0165 k vykonaniu \u013eubovo\u013en\u00e9ho k\u00f3du. Probl\u00e9m je sp\u00f4soben\u00fd t\u00fdm, \u017ee funkcia remove_signature() uchov\u00e1va poz\u00edcie podpisov v pevne stanovenom poli, ktor\u00e9 je vypo\u010d\u00edtan\u00e9 maxim\u00e1lne na dve podpisy. Pri prenose zna\u010dky s tromi a viacer\u00fdmi podpismi sa \u00fadaje ukladaj\u00fa mimo po\u013ea.\n<li class=\"l\"> CVE-2026-114469 &#8212; pri kontrole obmedzen\u00ed na ve\u013ekos\u0165 bin\u00e1rnych patchov sa zoh\u013ead\u0148ovali \u00fadaje pred rozbalen\u00edm komprimovan\u00fdch \u00fadajov, \u010do viedlo k \u010d\u00edtaniu obsahu z oblasti mimo hran\u00edc vyrovn\u00e1vacej pam\u00e4te.\n<li class=\"l\"> CVE-2026-105437 &#8212; po\u0161kodenie pam\u00e4te pri vykon\u00e1van\u00ed ve\u013ek\u00fdch oper\u00e1ci\u00ed zl\u00fa\u010denia v d\u00f4sledku akumul\u00e1cie ve\u013ekosti v\u00fdsledku v poli s typom int. V konfigur\u00e1cii GitLab m\u00f4\u017ee by\u0165 zranite\u013enos\u0165 zneu\u017eit\u00e1 na vykon\u00e1vanie k\u00f3du (probl\u00e9m je zablokovan\u00fd v GitLab 19.5.4).\n<li class=\"l\"> CVE-2026-114466 &#8212; prepisovanie \u013eubovo\u013en\u00fdch s\u00faborov vo FS cez pr\u00edkaz &#171;git fast-import&#187; kv\u00f4li nedostato\u010dn\u00e9mu odstr\u00e1neniu zranite\u013enosti CVE-2019-1348.\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66669\">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 \u043a\u043e\u0434\u043e\u043c Git 2.56.1, 2.55.1, 2.54.1, 2.53.1, 2.52.1, 2.51.3 \u0438 2.50.2, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e 6 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-111760) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u043a\u043e\u043c\u0430\u043d\u0434\u044b &#171;git clone&#187; \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 &#171;&#8212;recurse-submodules&#187; \u0441 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u044f\u043c\u0438, \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u044b\u043c\u0438 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e \u0434\u043b\u0438\u043d\u0430 \u0437\u0430\u043f\u0438\u0441\u0438 \u0441 \u0438\u043c\u0435\u043d\u0435\u043c \u0432 \u0438\u043d\u0434\u0435\u043a\u0441\u0435 \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442\u0441\u044f \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184239","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - 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 \u043a\u043e\u0434\u043e\u043c Git 2.56.1, 2.55.1, 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