{"id":183486,"date":"2026-09-27T10:53:30","date_gmt":"2026-09-27T08:53:30","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/uyazvimosti-v-lxd-incus-flatpak-gitlab-radicle-yadre-linux-wordpress-openvpn-ntfs-3g-freerdp-cups-i-dovecot"},"modified":"2026-09-27T10:53:35","modified_gmt":"2026-09-27T08:53:35","slug":"vulnerabilities-in-lxd-incus-flatpak-gitlab-radicle-the-linux-kernel-wordpress-openvpn-ntfs-3g-freerdp-cups-and-dovecot","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vulnerabilities-in-lxd-incus-flatpak-gitlab-radicle-the-linux-kernel-wordpress-openvpn-ntfs-3g-freerdp-cups-and-dovecot","title":{"rendered":"Zranitelnosti v LXD, Incus, Flatpak, GitLab, Radicle, j\u00e1dru Linux, WordPress, OpenVPN, NTFS-3G, FreeRDP, CUPS a Dovecot","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>N\u011bkolik ned\u00e1vno odhalen\u00fdch nebezpe\u010dn\u00fdch zranitelnost\u00ed, kter\u00e9 umo\u017e\u0148uj\u00ed z\u00edskat p\u0159\u00edstup root v syst\u00e9mu nebo dos\u00e1hnout vzd\u00e1len\u00e9ho spu\u0161t\u011bn\u00ed k\u00f3du.    <\/p>\n<ul>\n<li class=\"l\"> 7 zranitelnost\u00ed v syst\u00e9mu spr\u00e1vy kontejner\u016f LXD a 11 zranitelnost\u00ed ve fork Incus. N\u011bkolik zranitelnost\u00ed ozna\u010den\u00fdch jako kritick\u00e9 umo\u017e\u0148uje m\u00edstn\u00edm neopr\u00e1vn\u011bn\u00fdm u\u017eivatel\u016fm m\u011bnit jak\u00e9koli soubory v syst\u00e9mu nebo spustit sv\u016fj k\u00f3d s opr\u00e1vn\u011bn\u00edm root. Zranitelnosti byly odstran\u011bny ve vyd\u00e1n\u00edch LXD 6.9, 5.21.8, 5.0.10 a 4.0.14, stejn\u011b jako v Incus 7.5.1. Probl\u00e9my byly zp\u016fsobeny nespr\u00e1vn\u00fdm zpracov\u00e1n\u00edm cest k soubor\u016fm, probl\u00e9my p\u0159i pr\u00e1ci s symbolick\u00fdmi odkazy a absenc\u00ed kontroly vstupn\u00edch \u00fadaj\u016f v k\u00f3du pro migraci a z\u00e1lohov\u00e1n\u00ed izolovan\u00fdch prost\u0159ed\u00ed nebo na\u010d\u00edt\u00e1n\u00ed syst\u00e9mov\u00fdch obraz\u016f:\n<ul>\n<li class=\"l\"> CVE-2026-85526 \u2014 p\u0159eps\u00e1n\u00ed libovoln\u00fdch soubor\u016f v syst\u00e9mu p\u0159i zpracov\u00e1n\u00ed z\u00e1lohy obsahuj\u00edc\u00ed v subvolumes[].path cestu k bodu p\u0159ipojen\u00ed typu \u201e.. \/ .. \/ .. \/ .. \/ etc \/ cron.d\u201c.\n<li class=\"l\"> CVE-2026-85185 \u2014 z\u00e1pis a maz\u00e1n\u00ed libovoln\u00fdch soubor\u016f prost\u0159ednictv\u00edm uveden\u00ed v n\u00e1zvech pododd\u011blen\u00ed btrfs cest s \u201e.. \/ \u201c.\n<li class=\"l\"> CVE-2026-87799 \u2014 z\u00e1pis do libovoln\u00e9ho souboru v syst\u00e9mu prost\u0159ednictv\u00edm substituce symbolick\u00fdch odkaz\u016f p\u0159i migraci. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/vps\/\"   title=\"virtu\u00e1ln\u00edch stroj\u016f\" data-wpil-keyword-link=\"linked\">virtu\u00e1ln\u00edch stroj\u016f<\/a>.\n<li class=\"l\"> CVE-2026-87798 \u2014 p\u0159ekro\u010den\u00ed z\u00e1kladn\u00edho adres\u00e1\u0159e virtu\u00e1ln\u00edho stroje p\u0159i rekurzivn\u00edm p\u0159enosu soubor\u016f.\n<li class=\"l\"> CVE-2026-86334 \u2014 p\u0159ekro\u010den\u00ed z\u00e1kladn\u00edho adres\u00e1\u0159e p\u0159i exportu obrazu z extern\u00edho. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-los-angeles\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\">serveru<\/a>.\n<li class=\"l\"> CVE-2026-86335 \u2014 p\u0159\u00edstup k priv\u00e1tn\u00edm obraz\u016fm virtu\u00e1ln\u00edch stroj\u016f jin\u00fdch u\u017eivatel\u016f.\n<li class=\"l\"> CVE-2026-97335 \u2014 obch\u00e1zen\u00ed omezen\u00ed p\u0159\u00edstupu k projekt\u016fm.  <\/ul>\n<li class=\"l\"> Zranitelnosti v syst\u00e9mu samostatn\u00fdch bal\u00ed\u010dk\u016f Flatpak. Probl\u00e9my byly odstran\u011bny ve vyd\u00e1n\u00ed Flatpak 1.18.1. Mezi nejnebezpe\u010dn\u011bj\u0161\u00ed zranitelnosti pat\u0159\u00ed:\n<ul>\n<li class=\"l\"> CVE-2026-90616 \u2014 pou\u017eit\u00ed symbolick\u00fdch odkaz\u016f k obch\u00e1zen\u00ed sandboxov\u00e9 izolace a z\u00edsk\u00e1n\u00ed pln\u00e9ho p\u0159\u00edstupu k souborov\u00e9mu syst\u00e9mu hostitele;\n<li class=\"l\"> Zv\u00fd\u0161en\u00ed opr\u00e1vn\u011bn\u00ed na u\u017eivatele root prost\u0159ednictv\u00edm substituce symbolick\u00e9 linky (CVE nebyla p\u0159id\u011blena);\n<li class=\"l\"> CVE-2026-9627 \u2014 z\u00e1pis soubor\u016f s opr\u00e1vn\u011bn\u00edm root prost\u0159ednictv\u00edm manipulace s cestami k soubor\u016fm;\n<li class=\"l\"> CVE-2026-96275 \u2014 z\u00e1pis soubor\u016f s opr\u00e1vn\u011bn\u00edm root prost\u0159ednictv\u00edm manipulace se symbolick\u00fdmi odkazy;\n<li class=\"l\"> CVE-2026-96276 \u2014 z\u00e1pis soubor\u016f s opr\u00e1vn\u011bn\u00edm root prost\u0159ednictv\u00edm substituce \u201e.. \/ \u201c v cest\u00e1ch k soubor\u016fm p\u0159i prov\u00e1d\u011bn\u00ed p\u0159\u00edkazu \u201eflatpak build-init\u201c;\n<li class=\"l\"> CVE-2026-96279 \u2014 \u010dten\u00ed libovoln\u00fdch soubor\u016f v hlavn\u00edm syst\u00e9mu prost\u0159ednictv\u00edm vytvo\u0159en\u00ed tvrd\u00e9ho odkazu p\u0159i extrakci archivu OCI.\n<li class=\"l\"> CVE-2026-92162 \u2014 p\u0159\u00edstup k soubor\u016fm mimo z\u00e1kladn\u00ed adres\u00e1\u0159 prost\u0159ednictv\u00edm substituce \u201e.. \/ \u201c v parametrech DeployAppstream.\n<li class=\"l\"> CVE-2026-96280 \u2014 p\u0159ete\u010den\u00ed vyrovn\u00e1vac\u00ed pam\u011bti v zpracovateli delta aktualizac\u00ed OCI na 32bitov\u00fdch syst\u00e9mech.  <\/ul>\n<li class=\"l\"> Dv\u011b kritick\u00e9 zranitelnosti v platform\u011b pro spolupr\u00e1ci na v\u00fdvoji GitLab, kter\u00e9 umo\u017e\u0148uj\u00ed vzd\u00e1len\u00e9mu autentizovan\u00e9mu u\u017eivateli spustit sv\u016fj k\u00f3d na <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-newyork\/\"   title=\"serveru\" data-wpil-keyword-link=\"linked\">serveru<\/a> prost\u0159ednictv\u00edm substituce speci\u00e1ln\u011b form\u00e1tovan\u00e9ho regul\u00e1rn\u00edho v\u00fdrazu v nastaven\u00ed CI\\\/CD. Zranitelnosti jsou p\u0159\u00edtomny v parseru regul\u00e1rn\u00edch v\u00fdraz\u016f a jsou zp\u016fsobeny dvojit\u00fdm uvoln\u011bn\u00edm pam\u011bti (CVE-2026-89078) a p\u0159ete\u010den\u00edm cel\u00e9ho \u010d\u00edsla (CVE-2026-93577). Probl\u00e9my byly odstran\u011bny ve verz\u00edch 19.4.1, 19.3.3, 19.2.7.\n<li class=\"l\"> Dv\u011b kritick\u00e9 zranitelnosti v s\u00ed\u0165ov\u00e9m protokolu pou\u017e\u00edvan\u00e9m na uzlech decentralizovan\u00e9 platformy pro spolupr\u00e1ci Radicle. Prvn\u00ed zranitelnost umo\u017e\u0148uje sledov\u00e1n\u00ed dat vym\u011b\u0148ovan\u00fdch mezi uzly prost\u0159ednictv\u00edm monitorov\u00e1n\u00ed provozu. Druh\u00e1 zranitelnost umo\u017e\u0148uje pad\u011blat identifik\u00e1tor uzlu a z\u00edskat p\u0159\u00edstup k soukrom\u00fdm repozit\u00e1\u0159\u016fm. V kombinaci tyto zranitelnosti umo\u017e\u0148uj\u00ed extrakci obsahu jak\u00fdchkoli repozit\u00e1\u0159\u016f z uzl\u016f Radicle.\n<li class=\"l\"> Zranitelnost v j\u00e1d\u0159e Linuxu zp\u016fsoben\u00e1 p\u0159\u00edstupem k ji\u017e uvoln\u011bn\u00e9 pam\u011bti (use-after-free) kv\u016fli z\u00e1vodu podm\u00ednek v modulu espintcp, kter\u00fd se pou\u017e\u00edv\u00e1 pro enkapsulaci protokolu ESP (Encapsulating Security Payload) do TCP (ESP-in-TCP, RFC 8229). Probl\u00e9m byl vy\u0159e\u0161en v j\u00e1d\u0159e v \u00fanoru p\u0159ed vyd\u00e1n\u00edm 7.0. P\u0159ed n\u011bkolika dny byl pro zranitelnost vytvo\u0159en funk\u010dn\u00ed exploit, kter\u00fd umo\u017e\u0148uje spou\u0161t\u011bn\u00ed k\u00f3du s pr\u00e1vy root v syst\u00e9mu. Funk\u010dnost exploitu byla demonstrov\u00e1na v CentOS Stream 9 a Ubuntu 26.04 LTS.\n<li class=\"l\"> Kritick\u00e1 zranitelnost (CVE-2026-87902) v syst\u00e9mu pro spr\u00e1vu obsahu WordPress, kter\u00e1 umo\u017e\u0148uje neautentizovan\u00e9mu n\u00e1v\u0161t\u011bvn\u00edkovi webu spustit PHP k\u00f3d na serveru prost\u0159ednictv\u00edm manipulace se \u0161ablonami str\u00e1nek, pokud je na serveru p\u0159\u00edtomn\u00fd soubor pearcmd.php (k dispozici v ofici\u00e1ln\u00edm docker obraze a ve v\u00fdchoz\u00ed konfiguraci cPanel). Probl\u00e9m se tak\u00e9 projevuje ve fork ClassicPress. Zranitelnost je aktivn\u011b zneu\u017e\u00edv\u00e1na \u00fato\u010dn\u00edky k z\u00edsk\u00e1n\u00ed kontroly nad webov\u00fdmi str\u00e1nkami. Oprava byla vyd\u00e1na pro 25 v\u011btv\u00ed WordPress, od 7.1.2 po 4.7.37.\n<li class=\"l\"> 7 zranitelnost\u00ed v OpenVPN, v\u010detn\u011b probl\u00e9m\u016f zp\u016fsoben\u00fdch dvojit\u00fdm uvoln\u011bn\u00edm pam\u011bti (CVE-2026-84471), nespr\u00e1vn\u00fdm escapov\u00e1n\u00edm speci\u00e1ln\u00edch znak\u016f p\u0159i spou\u0161t\u011bn\u00ed p\u0159\u00edkazov\u00e9ho interpretu (CVE-2026-84256) a jedn\u00edm bajtov\u00fdm p\u0159ete\u010den\u00edm bufferu p\u0159i zpracov\u00e1n\u00ed voleb DHCP (CVE-2026-81738). Probl\u00e9my byly odstran\u011bny v vyd\u00e1n\u00ed OpenVPN 2.6.23.\n<li class=\"l\"> 8 zranitelnost\u00ed v bal\u00ed\u010dku NTFS-3G, kter\u00e9 potenci\u00e1ln\u011b umo\u017e\u0148uj\u00ed prov\u00e9st k\u00f3d s opr\u00e1vn\u011bn\u00edmi root p\u0159i zpracov\u00e1n\u00ed speci\u00e1ln\u011b upraven\u00fdch odd\u00edl\u016f nebo diskov\u00fdch obraz\u016f s FS NTFS. V\u0161echny zranitelnosti jsou zp\u016fsobeny p\u0159ete\u010den\u00edm bufferu. Probl\u00e9my byly odstran\u011bny ve verzi NTFS-3G 2026.9.18.\n<li class=\"l\"> Zranitelnost ve FreeRDP, kter\u00e1 umo\u017e\u0148uje nav\u00e1zat RDP spojen\u00ed s <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-prohoster\/\"   title=\"serverem\" data-wpil-keyword-link=\"linked\">serverem<\/a> bez autentizace. Probl\u00e9m byl opraven ve vyd\u00e1n\u00ed FreeRDP 3.31.0.\n<li class=\"l\"> Zranitelnost (CVE-2026-87766) v n\u00e1stroji pro organizaci pr\u00e1ce izolovan\u00fdch prost\u0159ed\u00ed Bubblewrap, kter\u00e1 umo\u017e\u0148uje zapisovat soubory mimo sandbox b\u011bhem konfigurace kontejneru manipulac\u00ed se symbolick\u00fdmi odkazy.\n<li class=\"l\"> Byl publikov\u00e1n exploit na zranitelnost v tiskov\u00e9m serveru CUPS, kter\u00e1 umo\u017e\u0148uje lok\u00e1ln\u00edmu u\u017eivateli z\u00edskat pr\u00e1va root v syst\u00e9mu skrze p\u0159eps\u00e1n\u00ed souboru \/etc\/cups\/cups-files.conf (nap\u0159. ur\u010den\u00edm tohoto souboru jako URI tisk\u00e1rny) a nahrazen\u00ed vol\u00e1n\u00ed cups-exec. Aktualizace CUPS zat\u00edm nebyla vyd\u00e1na.\n<li class=\"l\"> P\u0159\u00edstup k ji\u017e uvoln\u011bn\u00e9 pam\u011bti (CVE-2026-42007) na IMAP serveru Dovecot, kter\u00fd umo\u017e\u0148uje autentizovan\u00e9mu u\u017eivateli dos\u00e1hnout spu\u0161t\u011bn\u00ed sv\u00e9ho k\u00f3du na serveru prost\u0159ednictv\u00edm pou\u017eit\u00ed speci\u00e1ln\u011b upraven\u00e9ho Sieve skriptu. Zranitelnost byla opravena ve vyd\u00e1n\u00ed Dovecot 2.4.5.      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66350\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043e\u043f\u0430\u0441\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438\u043b\u0438 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430. 7 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0430\u043c\u0438 LXD \u0438 11 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0444\u043e\u0440\u043a\u0435 Incus. \u041d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u043c\u0435\u0447\u0435\u043d\u043d\u044b\u0435 \u043a\u0430\u043a \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u043c \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c 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