{"id":106827,"date":"2023-02-15T18:48:14","date_gmt":"2023-02-15T16:48:14","guid":{"rendered":"https:\/\/prohoster.info\/?p=106827"},"modified":"2023-02-16T11:50:36","modified_gmt":"2023-02-16T09:50:36","slug":"uyazvimosti-v-git-privodyashhaya-k-utechke-i-perezapisi-dannyh","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimosti-v-git-privodyashhaya-k-utechke-i-perezapisi-dannyh","title":{"rendered":"Zranite\u013enosti v Gite, ktor\u00e9 ved\u00fa k \u00faniku a prepisovaniu d\u00e1t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Boli zverejnen\u00e9 opravn\u00e9 vydania distribuovan\u00e9ho syst\u00e9mu spr\u00e1vy zdrojov\u00fdch k\u00f3dov Git 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7 a 2.30.8, v ktor\u00fdch boli odstr\u00e1nen\u00e9 dve zranite\u013enosti t\u00fdkaj\u00face sa optimaliz\u00e1ci\u00ed pri lok\u00e1lnom klonovan\u00ed a pr\u00edkazu &#171;git apply&#187;. Aktualiz\u00e1cie bal\u00edkov v distrib\u00faci\u00e1ch je mo\u017en\u00e9 sledova\u0165 na str\u00e1nkach Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD. Ak nie je mo\u017en\u00e9 nain\u0161talova\u0165 aktualiz\u00e1ciu, odpor\u00fa\u010da sa ako obch\u00e1dzaj\u00face opatrenie vyhn\u00fa\u0165 sa vykonaniu oper\u00e1cie &#171;git clone&#187; s vo\u013ebou &#171;&#8212;recurse-submodules&#187; v pr\u00edpade ned\u00f4veryhodn\u00fdch repozit\u00e1rov a tie\u017e nepou\u017e\u00edva\u0165 pr\u00edkazy &#171;git apply&#187; a &#171;git am&#187; s neoveren\u00fdm k\u00f3dom.          <\/p>\n<ul>\n<li class=\"l\"> Zranite\u013enos\u0165 CVE-2023-22490 umo\u017e\u0148uje \u00fato\u010dn\u00edkovi, ktor\u00fd ovl\u00e1da obsah klonovan\u00e9ho repozit\u00e1ra, z\u00edska\u0165 pr\u00edstup k citliv\u00fdm \u00fadajom na syst\u00e9me pou\u017e\u00edvate\u013ea. Vznik zranite\u013enosti sp\u00f4sobuj\u00fa dve nedostatky:\n<p>Prv\u00fd nedostatok umo\u017e\u0148uje, \u017ee pri pr\u00e1ci so \u0161peci\u00e1lne upraven\u00fdm repozit\u00e1rom sa dosiahne uplatnenie miestnych optimaliz\u00e1ci\u00ed klonovania, aj ke\u010f sa pou\u017e\u00edva doprava interaguj\u00faca s extern\u00fdmi syst\u00e9mami.      <\/p>\n<p>Druh\u00fd nedostatok umo\u017e\u0148uje umiestnenie symbolick\u00e9ho odkazu namiesto adres\u00e1ra $GIT_DIR\/objects, podobne ako pri zranite\u013enosti CVE-2022-39253, pri oprave ktorej sa zablokovalo umiest\u0148ovanie symbolick\u00fdch odkazov v adres\u00e1ri $GIT_DIR\/objects, ale neoverovalo sa, \u017ee samotn\u00fd adres\u00e1r $GIT_DIR\/objects m\u00f4\u017ee by\u0165 symbolick\u00fdm odkazom.     <\/p>\n<p>V re\u017eime lok\u00e1lneho klonovania git pres\u00fava $GIT_DIR\/objects do cie\u013eov\u00e9ho adres\u00e1ra, pri\u010dom vykon\u00e1va rozoberanie symbolick\u00fdch odkazov, \u010do vedie k tomu, \u017ee do cie\u013eov\u00e9ho adres\u00e1ra s\u00fa priamo kop\u00edrovan\u00e9 s\u00fabory, na ktor\u00e9 odkazy ukazuj\u00fa. Prechod na aplik\u00e1ciu lok\u00e1lnych optimaliz\u00e1ci\u00ed klonovania pre nelok\u00e1lnu dopravu umo\u017e\u0148uje vyu\u017ei\u0165 zranite\u013enos\u0165 pri pr\u00e1ci s vonkaj\u0161\u00edmi repozit\u00e1rmi (napr\u00edklad rekurz\u00edvne zahrnutie submodulov pr\u00edkazom &#171;git clone &#8212;recurse-submodules&#187; m\u00f4\u017ee vies\u0165 ku klonovaniu \u0161kodliv\u00e9ho repozit\u00e1ra, zabalen\u00e9ho vo forme submodulu v inom repozit\u00e1ri).     <\/p>\n<li class=\"l\"> Zranite\u013enos\u0165 CVE-2023-23946 umo\u017e\u0148uje prep\u00edsa\u0165 obsah s\u00faborov mimo pracovn\u00e9ho adres\u00e1ra prostredn\u00edctvom odovzdania \u0161peci\u00e1lne form\u00e1tovanej vstupnej hodnoty do pr\u00edkazu &#171;git apply&#187;. Napr\u00edklad \u00fatok m\u00f4\u017ee by\u0165 vykonan\u00fd pri spracovan\u00ed v &#171;git apply&#187; pripraven\u00fdch patchov od \u00fato\u010dn\u00edka. Na zablokovanie vytv\u00e1rania patchmi s\u00faborov mimo pracovnej k\u00f3pie, &#171;git apply&#187; blokuje spracovanie patchov, ktor\u00e9 sa pok\u00fa\u0161aj\u00fa zap\u00edsa\u0165 s\u00fabor pomocou symbolick\u00fdch odkazov. T\u00e1to ochrana sa v\u0161ak uk\u00e1zala ako obch\u00e1dzate\u013en\u00e1 vytvoren\u00edm symbolick\u00e9ho odkazu v prvom rade.      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58655\">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 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7 \u0438 2.30.8, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0438\u0435 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u0438 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c \u043a\u043b\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 \u0438 \u043a\u043e\u043c\u0430\u043d\u0434\u0443 &#171;git apply&#187;. \u041f\u0440\u043e\u0441\u043b\u0435\u0434\u0438\u0442\u044c \u0437\u0430 \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u043c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043d\u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u0445 Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD. \u0415\u0441\u043b\u0438 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043d\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f [&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-106827","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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 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