{"id":137924,"date":"2025-06-21T23:12:01","date_gmt":"2025-06-21T21:12:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-biblioteke-libxml2-potenczialno-privodyashhie-k-vypolneniyu-koda"},"modified":"2025-06-21T23:12:01","modified_gmt":"2025-06-21T21:12:01","slug":"uyazvimosti-v-biblioteke-libxml2-potenczialno-privodyashhie-k-vypolneniyu-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-v-biblioteke-libxml2-potenczialno-privodyashhie-k-vypolneniyu-koda","title":{"rendered":"A libxml2 k\u00f6nyvt\u00e1rban felfedezett sebezhet\u0151s\u00e9gek, amelyek potenci\u00e1lisan k\u00f3dv\u00e9grehajt\u00e1shoz vezethetnek","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A GNOME projekt \u00e1ltal fejlesztett Libxml2 k\u00f6nyvt\u00e1rban, amelyet XML-form\u00e1tum\u00fa tartalom feldolgoz\u00e1s\u00e1ra haszn\u00e1lnak, \u00f6t sebezhet\u0151s\u00e9get azonos\u00edtottak, amelyek k\u00f6z\u00fcl kett\u0151 potenci\u00e1lisan k\u00f3dv\u00e9grehajt\u00e1shoz vezethet, ha speci\u00e1lisan form\u00e1zott k\u00fcls\u0151 adatokat dolgoznak fel. A Libxml2 k\u00f6nyvt\u00e1r sz\u00e9les k\u00f6rben elterjedt ny\u00edlt forr\u00e1sk\u00f3d\u00fa projektekben, \u00e9s p\u00e9ld\u00e1ul t\u00f6bb mint 800 Ubuntu csomag f\u00fcgg\u0151s\u00e9gek\u00e9nt is haszn\u00e1lj\u00e1k. <\/p>\n

Az els\u0151 sebezhet\u0151s\u00e9g (CVE-2025-6170) egy puffer t\u00falcsordul\u00e1sb\u00f3l ered az xmllint interakt\u00edv parancssori eszk\u00f6z megval\u00f3s\u00edt\u00e1s\u00e1ban, amely XML f\u00e1jlok elemz\u00e9s\u00e9re szolg\u00e1l. A t\u00falcsordul\u00e1s a parancssori argumentumok t\u00fal hossz\u00fa m\u00e9rete miatt k\u00f6vetkezik be, mivel a bemeneti adatok m\u00e9ret\u00e9nek helyes ellen\u0151rz\u00e9se hi\u00e1nyzik a strcpy() f\u00fcggv\u00e9ny \u00e1ltal t\u00f6rt\u00e9n\u0151 m\u00e1sol\u00e1s el\u0151tt. A sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1hoz a t\u00e1mad\u00f3nak befoly\u00e1solnia kell a xmllint-nek \u00e1tadott parancsokat. A sebezhet\u0151s\u00e9g jav\u00edt\u00e1s\u00e1ra vonatkoz\u00f3 jav\u00edt\u00e1s jelenleg nem el\u00e9rhet\u0151. <\/p>\n

A m\u00e1sodik sebezhet\u0151s\u00e9g (CVE-2025-6021) az xmlBuildQName() f\u00fcggv\u00e9ny megval\u00f3s\u00edt\u00e1s\u00e1ban tal\u00e1lhat\u00f3, \u00e9s puffert\u00falcsordul\u00e1st okoz, mivel a puffer m\u00e9ret\u00e9nek meghat\u00e1roz\u00e1sa a prefix \u00e9s a lok\u00e1lis n\u00e9v alapj\u00e1n nem megfelel\u0151en val\u00f3sul meg. A sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1hoz a t\u00e1mad\u00f3nak m\u00f3dos\u00edtania kell az xmlBuildQName() f\u00fcggv\u00e9nynek \u00e1tadott prefix \u00e9s ncname argumentumokat. A sebezhet\u0151s\u00e9g jav\u00edt\u00e1s\u00e1ra elk\u00e9sz\u00fclt egy jav\u00edt\u00e1s. A jav\u00edt\u00e1s a libxml2 2.14.4-es kiad\u00e1s\u00e1ba ker\u00fclt. Az \u00faj csomag \u00e1llapot\u00e1t vagy a jav\u00edt\u00e1s el\u0151k\u00e9sz\u00edt\u00e9s\u00e9t az al\u00e1bbi oldalakon ellen\u0151rizheti (ha az oldal nem el\u00e9rhet\u0151, az azt jelenti, hogy a disztrib\u00faci\u00f3 fejleszt\u0151i m\u00e9g nem kezdt\u00e9k el a probl\u00e9ma megvizsg\u00e1l\u00e1s\u00e1t): Debian, Ubuntu, Fedora, SUSE\/openSUSE, RHEL, Gentoo \u00e9s Arch (1, 2). <\/p>\n

A tov\u00e1bbi h\u00e1rom probl\u00e9ma a m\u00e1r felszabad\u00edtott mem\u00f3ria ter\u00fclet el\u00e9r\u00e9s\u00e9hez vezet az xmlSchematronGetNode (CVE-2025-49794) f\u00fcggv\u00e9nyben, null pointer derefer\u00e1l\u00e1shoz az xmlXPathCompiledEval (CVE-2025-49795) f\u00fcggv\u00e9nyben \u00e9s t\u00edpuskever\u00e9shez (Type Confusion) az xmlSchematronFormatReport f\u00fcggv\u00e9nyben (CVE-2025-49796). E sebezhet\u0151s\u00e9gek kezel\u00e9s\u00e9re a libxml2-b\u0151l a Schematron jel\u00f6l\u0151nyelv t\u00e1mogat\u00e1s\u00e1nak elt\u00e1vol\u00edt\u00e1s\u00e1t vizsg\u00e1lj\u00e1k. <\/p>\n

Tov\u00e1bb\u00e1 megeml\u00edtj\u00fck, hogy h\u00e1rom jav\u00edtatlan s\u00e9r\u00fcl\u00e9kenys\u00e9g van a libxslt k\u00f6nyvt\u00e1rban, amely nincs t\u00e1mogatva. Ezekr\u0151l a probl\u00e9m\u00e1kr\u00f3l egyel\u0151re nincs inform\u00e1ci\u00f3, a k\u00f6zz\u00e9t\u00e9tel\u00fck j\u00falius 9-re, j\u00falius 13-ra \u00e9s augusztus 6-ra van tervezve. A jav\u00edtatlan \u00e9s nyilv\u00e1nosan nem k\u00f6zz\u00e9tett s\u00e9r\u00fcl\u00e9kenys\u00e9geket a GNOME-mal kapcsolatos projektekben, mint a gvfs, libgxps, gdm, glib, GIMP \u00e9s libsoup is r\u00f6gz\u00edtik. <\/p>\n

Kieg\u00e9sz\u00edt\u00e9s: A libxml2 t\u00e1mogat\u00f3ja bejelentette, hogy a j\u00f6v\u0151ben a s\u00e9r\u00fcl\u00e9kenys\u00e9geket norm\u00e1l hibak\u00e9nt kezeli, nem prioritiz\u00e1lva azokat, jav\u00edtva, ha ideje engedi, \u00e9s azonnal k\u00f6zz\u00e9t\u00e9ve a s\u00e9r\u00fcl\u00e9kenys\u00e9g l\u00e9nyeg\u00e9t, an\u00e9lk\u00fcl, hogy embarg\u00f3t vezetne be vagy id\u0151t biztos\u00edtana a harmadik f\u00e9l term\u00e9keiben val\u00f3 jav\u00edt\u00e1sra.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 Libxml2, \u0440\u0430\u0437\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u043c\u043e\u0439 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c GNOME \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u0432 \u0444\u043e\u0440\u043c\u0430\u0442\u0435 XML, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 5 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0434\u0432\u0435 \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\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 \u0432\u043d\u0435\u0448\u043d\u0438\u0445 \u0434\u0430\u043d\u043d\u044b\u0445. \u0411\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 Libxml2 \u0448\u0438\u0440\u043e\u043a\u043e \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u0430\u0445 \u0438, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0431\u043e\u043b\u0435\u0435 \u0447\u0435\u043c 800 \u043f\u0430\u043a\u0435\u0442\u0430\u0445 \u0438\u0437 \u0441\u043e\u0441\u0442\u0430\u0432\u0430 Ubuntu. \u041f\u0435\u0440\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-6170) […]<\/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-137924","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47S\u00e9r\u00fcl\u00e9kenys\u00e9gek a libxml2 k\u00f6nyvt\u00e1rban, amelyek potenci\u00e1lisan k\u00f3d v\u00e9grehajt\u00e1s\u00e1hoz vezethetnek | ProHoster","description":"A GNOME projekt \u00e1ltal fejlesztett Libxml2 k\u00f6nyvt\u00e1rban, amelyet XML form\u00e1tum\u00fa tartalom feldolgoz\u00e1s\u00e1ra haszn\u00e1lnak, 5 s\u00e9r\u00fcl\u00e9kenys\u00e9get t\u00e1rtak fel, amelyek k\u00f6z\u00fcl 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