{"id":52355,"date":"2019-11-06T00:00:00","date_gmt":"2019-11-05T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/uyazvimosti-v-cpio-i-libarchive"},"modified":"2020-02-18T14:00:03","modified_gmt":"2020-02-18T11:00:03","slug":"uyazvimosti-v-cpio-i-libarchive","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimosti-v-cpio-i-libarchive","title":{"rendered":"Zranite\u013enosti v cpio a libarchive","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po \u0161tyroch rokoch od posledn\u00e9ho vydania <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/info-gnu@gnu.org\/msg02668.html\">bol zverejnen\u00fd<\/a><\/noindex> bola vydan\u00e1 verzia n\u00e1stroja na archiv\u00e1ciu s\u00faborov cpio 2.13, ktor\u00fd sa vyu\u017e\u00edva v RPM bal\u00edkoch a v initramfs. V novej verzii boli odstr\u00e1nen\u00e9 tri zranite\u013enosti:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2015-1197\">CVE-2015-1197<\/a><\/noindex> \u2014 umo\u017e\u0148uje prep\u00edsanie s\u00faborov mimo adres\u00e1ra, do ktor\u00e9ho sa rozba\u013euje arch\u00edv.\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2016-2037\">CVE-2016-2037<\/a><\/noindex> \u2014 vedie k z\u00e1pisu do oblasti mimo vy\u010dlenen\u00e9ho bufferu pri spracovan\u00ed \u0161peci\u00e1lne form\u00e1tovan\u00fdch s\u00faborov cpio;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2019-14866\">CVE-2019-14866<\/a><\/noindex>) \u2014 z d\u00f4vodu nedostato\u010dnej kontroly hlavi\u010dky TAR s\u00faboru umo\u017e\u0148uje pri vytv\u00e1ran\u00ed arch\u00edvu vo form\u00e1te TAR zo zoznamu s\u00faborov, v pr\u00edpade pr\u00edtomnosti v tomto zozname \u0161peci\u00e1lne form\u00e1tovan\u00e9ho ve\u013emi ve\u013ek\u00e9ho tar-arch\u00edvu, vytvori\u0165 v\u00fdsledn\u00fd arch\u00edv, ktor\u00fd obsahuje s\u00fabory rozbalen\u00e9 z pridan\u00e9ho tar-arch\u00edvu s nespr\u00e1vnymi pr\u00edstupov\u00fdmi pr\u00e1vami.\n<p>    tar cf suffix.tar AUTHORS<br \/>\n    dd if=\/dev\/zero seek=16G bs=1 count=0 of=suffix.tar<br \/>\n    echo suffix.tar | cpio -H tar -o | tar tvf \u2014<\/p>\n<p>    -rw-r\u2014r\u2014 1000\/1000       0 2019-08-30 16:40 suffix.tar<br \/>\n    -rw-r\u2014r\u2014 thomas\/thomas 161 2019-08-30 16:40 AUTHORS<\/p>\n<\/ul>\n<p>Okrem toho v kni\u017enici <noindex><a rel=\"nofollow\" href=\"https:\/\/www.libarchive.org\/\">Libarchive<\/a><\/noindex>, ktor\u00e1 poskytuje n\u00e1stroje na pr\u00e1cu s r\u00f4znymi form\u00e1tmi arch\u00edvov a komprimovan\u00fdch s\u00faborov, <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.firosolutions.com\/exploits\/libarchi\">bola zisten\u00e1<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2019-18408\">zranite\u013enos\u0165<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-18408\">CVE-2019-18408<\/a><\/noindex>), ktor\u00e1 vedie k pr\u00edstupu k u\u017e uvo\u013enen\u00e9mu bloku pam\u00e4te (use-after-free) pri spracovan\u00ed \u0161peci\u00e1lne upraven\u00fdch s\u00faborov vo form\u00e1te RAR. Probl\u00e9m m\u00f4\u017ee potenci\u00e1lne vies\u0165 k spusteniu k\u00f3du \u00fato\u010dn\u00edka, av\u0161ak mo\u017enosti jeho zneu\u017eitia sa pova\u017euj\u00fa za m\u00e1lo pravdepodobn\u00e9 (\u00farove\u0148 nebezpe\u010denstva je stanoven\u00e1 na 4.4 z 10, \u010do znamen\u00e1, \u017ee probl\u00e9my s\u00fa pova\u017eovan\u00e9 za ne\u0161kodn\u00e9). Probl\u00e9m bez zbyto\u010dn\u00e9ho rozruchu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libarchive\/libarchive\/commit\/b8592ecba2f9e451e1f5cb7ab6dcee8b8e7b3f60\">bola odstr\u00e1nen\u00e1<\/a><\/noindex> v vydan\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libarchive\/libarchive\/releases\/tag\/v3.4.0\">3.4.0<\/a><\/noindex>.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51820\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043f\u0443\u0441\u0442\u044f \u0447\u0435\u0442\u044b\u0440\u0435 \u0433\u043e\u0434\u0430 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0430\u0440\u0445\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0444\u0430\u0439\u043b\u043e\u0432 cpio 2.13, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0432 \u043f\u0430\u043a\u0435\u0442\u0430\u0445 RPM \u0438 \u0432 initramfs. \u0412 \u043d\u043e\u0432\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0442\u0440\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2015-1197 &#8212; \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0444\u0430\u0439\u043b\u044b \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0430\u0441\u043a\u0440\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0430\u0440\u0445\u0438\u0432. CVE-2016-2037 &#8212; \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u0437\u0430\u043f\u0438\u0441\u0438 \u0432 \u043e\u0431\u043b\u0430\u0441\u0442\u044c \u0432\u043d\u0435 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 [&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-52355","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 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