{"id":145323,"date":"2025-10-16T17:11:54","date_gmt":"2025-10-16T15:11:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-samba-pozvolyayushhaya-udalyonno-vypolnit-kod-na-servere"},"modified":"2025-10-16T17:11:54","modified_gmt":"2025-10-16T15:11:54","slug":"uyazvimost-v-samba-pozvolyayushhaya-udalyonno-vypolnit-kod-na-servere","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/uyazvimost-v-samba-pozvolyayushhaya-udalyonno-vypolnit-kod-na-servere","title":{"rendered":"S\u00e5rbarhed i Samba, der muligg\u00f8r fjernudf\u00f8relse af kode p\u00e5 serveren","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Korrigerende udgivelser af Samba-pakken 4.23.2, 4.22.5 og 4.21.9 er offentliggjort for at l\u00f8se s\u00e5rbarheden (CVE-2025-10230) i implementeringen af WINS-navnel\u00f8sningstjenesten, hvilket muligg\u00f8r fjernudf\u00f8relse af brugerdefineret kode p\u00e5 serveren uden at skulle godkende. Problemet er blevet tildelt den h\u00f8jeste fareklasse \u2014 10 ud af 10. <\/p>\n

S\u00e5rbarheden skyldes manglende tilstr\u00e6kkelig kontrol af de v\u00e6rdier, der sendes inden opstart af det program, der er angivet i parameteren 'wins hook'. Dette program k\u00f8res via kommandoen 'sh -c' ved hver \u00e6ndring af navnet gennem WINS. N\u00e5r WINS anvendes i en kontroller dom\u00e6net<\/a> Active Directory, blev de NetBIOS-navne, der overf\u00f8res som argumenter til kommandolinjen ved opstart af hook-programmet, ikke renset for specialtegn, hvilket gjorde det muligt at udf\u00f8re vilk\u00e5rlige shell-kommandoer ved at angive et specielt formateret NetBIOS-navn i foresp\u00f8rgslen til WINS-serveren. cmd = talloc_asprintf(tmp_mem, '%s %s %s x %ld', wins_hook_script, wins_hook_action_string(action), rec->name->name, rec->name->type, (long int) rec->expire_time); ... execl('\/bin\/sh', 'sh', '-c', cmd, NULL); <\/p>\n

En klient uden godkendelse kan sende en registreringspakke til WINS-serveren og anmode om et vilk\u00e5rligt NetBIOS-navn, der ikke overstiger 15 tegn. Rensning af s\u00e5danne tegn som '' og ';' i navnet foretages ikke. Derfor vil overf\u00f8rslen af et navn som 'name;id>file' ved k\u00f8rsel af hook-behandleren resultere i, at v\u00e6rkt\u00f8jet 'id' udf\u00f8res, og output rettes til filen 'file'. <\/p>\n

S\u00e5rbarheden optr\u00e6der p\u00e5 systemer, hvor parameteren 'wins hook' er indstillet i smb.conf ved brug af en dom\u00e6nekontroller med aktiv serveren<\/a> WINS (som som standard er deaktiveret og kr\u00e6ver, at parameteren 'wins support = yes' aktiveres). Ved brug af WINS-servere i systemer uden dom\u00e6nekontroller optr\u00e6der s\u00e5rbarheden ikke. Du kan kontrollere status for den nye version af pakken eller forberedelse af en patch i distributioner p\u00e5 f\u00f8lgende sider: Debian, Ubuntu, Fedora, SUSE\/openSUSE, RHEL, Gentoo, Arch, FreeBSD, OpenBSD og NetBSD. <\/p>\n

I de offentliggjorte versioner af Samba er der ogs\u00e5 rettet en mindre farlig s\u00e5rbarhed (CVE-2025-9640), der f\u00f8rer til l\u00e6kage af uinitialiseret hukommelse. Problemet opst\u00e5r i modulet vfs_streams_xattr under hukommelsessvigt, som kan fremkaldes ved at udf\u00f8re skriveoperationer, der skaber tomme omr\u00e5der i filen. S\u00e5rbarheden kan udnyttes af en autentificeret bruger.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u0443\u043a\u0430\u0437\u0430\u043d\u043d\u043e\u0433\u043e \u0432 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0435 «wins hook». \u0414\u0430\u043d\u043d\u043e\u0435 […]<\/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-145323","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\u00e5rbarhed i Samba, der muligg\u00f8r fjernudf\u00f8relse af kode p\u00e5 serveren | ProHoster","description":"Der er offentliggjort rettelsesudgaver af Samba-pakkerne 4.23.2, 4.22.5 og 4.21.9, som l\u00f8ser en s\u00e5rbarhed (CVE-2025-10230) i 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\u043a\u043e\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 | ProHoster","og:description":"\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 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.23.2, 4.22.5 \u0438 4.21.9 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2025-10230) \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0440\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0438\u043c\u0451\u043d WINS, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \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 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