{"id":121960,"date":"2025-02-16T20:22:05","date_gmt":"2025-02-16T18:22:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-postgresql-ustranena-uyazvimost-ispolzovannaya-pri-atake-na-beyondtrust"},"modified":"2025-02-16T20:22:05","modified_gmt":"2025-02-16T18:22:05","slug":"v-postgresql-ustranena-uyazvimost-ispolzovannaya-pri-atake-na-beyondtrust","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-postgresql-ustranena-uyazvimost-ispolzovannaya-pri-atake-na-beyondtrust","title":{"rendered":"PostgreSQL-ben egy sebezhet\u0151s\u00e9get jav\u00edtottak, amelyet a BeyondTrust elleni t\u00e1mad\u00e1s sor\u00e1n haszn\u00e1ltak","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A megfelel\u0151 friss\u00edt\u00e9sek elk\u00e9sz\u00fcltek a PostgreSQL 17.3, 16.7, 15.11, 14.16 \u00e9s 13.19 \u00f6sszes t\u00e1mogatott \u00e1gv\u00e1ltozat\u00e1hoz, amelyek t\u00f6bb mint 70 hib\u00e1t jav\u00edtottak \u00e9s egy sebezhet\u0151s\u00e9get (CVE-2025-1094) orvosoltak, amely december v\u00e9g\u00e9n volt akt\u00edv a BeyondTrust \u00e9s az Egyes\u00fclt \u00c1llamok P\u00e9nz\u00fcgyminiszt\u00e9riuma elleni t\u00e1mad\u00e1s sor\u00e1n. A PostgreSQL probl\u00e9m\u00e1j\u00e1t a BeyondTrust PRA (Privileged Remote Access) \u00e9s BeyondTrust RS (Remote Support) szolg\u00e1ltat\u00e1sain bel\u00fcli t\u00e1voli sebezhet\u0151s\u00e9g (CVE-2024-12356) elemz\u00e9se sor\u00e1n fedezt\u00e9k fel, amely sor\u00e1n egy kor\u00e1bban ismeretlen (0-napos) sebezhet\u0151s\u00e9get is kihaszn\u00e1ltak a libpq-ban. <\/p>\n

A t\u00e1mad\u00e1s k\u00f6vetkezt\u00e9ben a t\u00e1mad\u00f3knak siker\u00fclt hozz\u00e1f\u00e9r\u00e9si kulcsot szerezni\u00fck az API-hoz, amelyet a BeyondTrust SaaS-szolg\u00e1ltat\u00e1sok \u00fcgyfeleinek t\u00e1voli technikai t\u00e1mogat\u00e1sa sor\u00e1n alkalmaztak. Ezt az API-t a jelsz\u00f3 vissza\u00e1ll\u00edt\u00e1s\u00e1ra haszn\u00e1lt\u00e1k, amelynek k\u00f6vetkezt\u00e9ben megs\u00e9rtett\u00e9k az Egyes\u00fclt \u00c1llamok P\u00e9nz\u00fcgyminiszt\u00e9rium\u00e1nak infrastrukt\u00far\u00e1j\u00e1t, amely a BeyondTrust term\u00e9keit haszn\u00e1lja. A t\u00e1mad\u00e1s sor\u00e1n a t\u00e1mad\u00f3k bizalmas dokumentumokat tudtak let\u00f6lteni, \u00e9s hozz\u00e1f\u00e9rtek a t\u00e1rcs\u00e1z\u00f3k munka\u00e1llom\u00e1saihoz. <\/p>\n

A sebezhet\u0151s\u00e9g a libpq k\u00f6nyvt\u00e1rban jelentkezik, amely API-t biztos\u00edt az adatb\u00e1zisok C nyelven t\u00f6rt\u00e9n\u0151 el\u00e9r\u00e9s\u00e9hez (a k\u00f6nyvt\u00e1rhoz C++, Perl, PHP \u00e9s Python nyelveken egyar\u00e1nt k\u00e9sz\u00fcltek k\u00f6t\u0151k\u00f6nyvt\u00e1rak). A probl\u00e9ma \u00e9rinti azokat az alkalmaz\u00e1sokat, amelyek a speci\u00e1lis karakterek sz\u00f6k\u00e9s\u00e9nek \u00e9s a id\u00e9z\u0151jelek semleges\u00edt\u00e9s\u00e9nek \u00e9rdek\u00e9ben a PQescapeLiteral(), PQescapeIdentifier(), PQescapeString() vagy PQescapeStringConn() funkci\u00f3kat haszn\u00e1lj\u00e1k. <\/p>\n

A t\u00e1mad\u00f3 el\u00e9rheti saj\u00e1t SQL-k\u00f3dj\u00e1nak behelyettes\u00edt\u00e9s\u00e9t, ha a k\u00fcls\u0151 forr\u00e1sb\u00f3l \u00e9rkez\u0151 sz\u00f6veget a fenti libpq funkci\u00f3kkal sz\u00f6kellve haszn\u00e1lj\u00e1k SQL-lek\u00e9rdez\u00e9sben. A BeyondTrust alkalmaz\u00e1saiban az \u00edgy sz\u00f6kell\u0151 lek\u00e9rdez\u00e9seket a psql parancssori seg\u00e9dprogramon kereszt\u00fcl tov\u00e1bb\u00edtott\u00e1k. A sebezhet\u0151s\u00e9g a sz\u00f6k\u00e9si funkci\u00f3kban a Unicode karakterek \u00e9rv\u00e9nyess\u00e9gi ellen\u0151rz\u00e9s\u00e9nek hi\u00e1ny\u00e1b\u00f3l ad\u00f3dik, amely lehet\u0151v\u00e9 teszi a norm\u00e1l\u00e1si id\u00e9z\u0151jelek megker\u00fcl\u00e9s\u00e9t hib\u00e1s t\u00f6bbb\u00e1jtos UTF-8 szekvenci\u00e1k megad\u00e1s\u00e1val. <\/p>\n

A sebezhet\u0151s\u00e9get egy hib\u00e1s UTF-8 karakter, amely a 0xC0 \u00e9s 0x27 b\u00e1jtokb\u00f3l \u00e1ll («\u2514'»), lehet kihaszn\u00e1lni. A 0x27 b\u00e1jt az ASCII k\u00f3dol\u00e1sban egy id\u00e9z\u0151jelet («‘») k\u00e9pvisel, amelyet \u00e9rdemes escaping-elni. Az escaping k\u00f3dban a 0xC0 \u00e9s 0x27 b\u00e1jtok sorozatak\u00e9nt egy Unicode karakterk\u00e9nt kezelend\u0151ek. Ekk\u00e9ppen a 0x27 b\u00e1jt ebben a sorrendben nem lesz escaped, m\u00edg a psql utility SQL lek\u00e9rdez\u00e9s\u00e9nek feldolgoz\u00e1sakor id\u00e9z\u0151jelk\u00e9nt ker\u00fcl feldolgoz\u00e1sra. <\/p>\n

Mikor SQL lek\u00e9rdez\u00e9sek futtat\u00e1sakor<\/a> A psql utility seg\u00edts\u00e9g\u00e9vel szabad k\u00f3d v\u00e9grehajt\u00e1s\u00e1ra a «\!» parancsot haszn\u00e1lhatjuk, amely a psql-ben tetsz\u0151leges programok ind\u00edt\u00e1s\u00e1ra szolg\u00e1l. P\u00e9ld\u00e1ul az ind\u00edt\u00e1s\u00e1hoz szerveren<\/a> az «id» utility-nak \u00e1tadhatjuk a «hax\xC0′; \! id #» \u00e9rt\u00e9ket. Az al\u00e1bbi p\u00e9ld\u00e1ban a PHP-skriptnak, a dbquote-nak, amely a pg_escape_string PHP f\u00fcggv\u00e9nyt haszn\u00e1lja, amely a libpq-b\u00f3l sz\u00e1rmaz\u00f3 PQescapeString f\u00fcggv\u00e9ny felett m\u0171k\u00f6dik, a k\u00f6vetkez\u0151 k\u00e9ppen t\u00f6rt\u00e9nik a escaping: $ echo -e «hello \xC0’world'» | .\\\/dbquote ‘hello \u2514’world»’ $ quoted=$(echo -e «hax\xC0′; \! id # » | .\\\/dbquote) $ echo «SELECT COUNT(1) FROM gw_sessions WHERE session_key = $quoted AND session_type = ‘sdcust’ AND (expiration IS NULL OR expiration>NOW())» | psql -e SELECT COUNT(1) FROM gw_sessions WHERE session_key = ‘hax\u2514’; HIBA: \u00e9rv\u00e9nytelen b\u00e1jtsorozat a «UTF8» k\u00f3dol\u00e1shoz: 0xc0 0x27 uid=1000(myexamplecompany) gid=1000(myexamplecompany)
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0421\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0432\u0441\u0435\u0445 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0432\u0435\u0442\u043e\u043a PostgreSQL 17.3, 16.7, 15.11, 14.16 \u0438 13.19, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043e \u0431\u043e\u043b\u0435\u0435 70 \u043e\u0448\u0438\u0431\u043e\u043a \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-1094), \u0432 \u043a\u043e\u043d\u0446\u0435 \u0434\u0435\u043a\u0430\u0431\u0440\u044f \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u0432 \u0430\u0442\u0430\u043a\u0435 \u043d\u0430 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u044e BeyondTrust \u0438 \u041c\u0438\u043d\u0438\u0441\u0442\u0435\u0440\u0441\u0442\u0432\u043e \u0444\u0438\u043d\u0430\u043d\u0441\u043e\u0432 \u0421\u0428\u0410. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432 PostgreSQL \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043f\u0440\u0438 \u0430\u043d\u0430\u043b\u0438\u0437\u0435 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2024-12356) \u0432 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u0445 BeyondTrust PRA (Privileged Remote Access) \u0438 BeyondTrust […]<\/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-121960","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\udd47A PostgreSQL-ben jav\u00edtott\u00e1k a BeyondTrust ellen ind\u00edtott t\u00e1mad\u00e1s sor\u00e1n kihaszn\u00e1lhat\u00f3 sebezhet\u0151s\u00e9get | ProHoster","description":"Jav\u00edt\u00f3friss\u00edt\u00e9sek k\u00e9sz\u00fcltek a PostgreSQL \u00f6sszes t\u00e1mogatott \u00e1gazat\u00e1hoz: 17.3, 16.7, 15.11, 14.16 \u00e9s 13.19, amelyekben t\u00f6bb mint 70 hib\u00e1t jav\u00edtottak \u00e9s egy sebezhet\u0151s\u00e9get (CVE-2025-1094) orvosoltak, amely december v\u00e9g\u00e9n mer\u00fclt fel.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/v-postgresql-ustranena-uyazvimost-ispolzovannaya-pri-atake-na-beyondtrust","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412 PostgreSQL \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u043f\u0440\u0438 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