{"id":183295,"date":"2026-09-08T22:53:24","date_gmt":"2026-09-08T20:53:24","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/uyazvimost-v-os-qubes-pozvolyayushhaya-obojti-izolyacziyu-i-vypolnit-kod-na-urovne-dom0"},"modified":"2026-09-08T22:53:29","modified_gmt":"2026-09-08T20:53:29","slug":"qubes-os-vulnerability-allows-isolation-bypass-and-code-execution-in-dom0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/qubes-os-vulnerability-allows-isolation-bypass-and-code-execution-in-dom0","title":{"rendered":"Vulnerabilitate \u00een sistemul de operare Qubes, care permite ocolirea izol\u0103rii \u0219i execu\u021bia codului la nivelul Dom0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A fost publicat\u0103 informa\u021bia despre o vulnerabilitate \u00een sistemul de operare Qubes, care utilizeaz\u0103 un hypervisor pentru o izolare strict\u0103 a aplica\u021biilor \u0219i componentelor sistemului de operare (fiecare clas\u0103 de aplica\u021bii \u0219i serviciile de sistem ruleaz\u0103 \u00een ma\u0219ini virtuale separate). \u00cen cazul \u00een care un atacator compromite una dintre ma\u0219inile virtuale, vulnerabilitatea permite s\u0103 ocoleasc\u0103 izola\u021bia, s\u0103 execute comenzi arbitrare \u00een mediul gazd\u0103 (Dom0) \u0219i s\u0103 ob\u021bin\u0103 controlul asupra \u00eentregului sistem de operare. Problema apare atunci c\u00e2nd utilizatorul folose\u0219te utilitarul «qvm-copy-to-vm» pentru a copia un fi\u0219ier din mediul gazd\u0103 \u00een ma\u0219ina virtual\u0103 aflat\u0103 sub controlul atacatorului. Vulnerabilitatea a fost remediat\u0103 \u00een actualizarea pachetului qubes-core-dom0-linux 4.3.22. <\/p>\n

Problema este prezent\u0103 \u00een utilitarul «qvm-copy-to-vm» \u0219i este cauzat\u0103 de tratarea incorect\u0103 a erorilor returnate atunci c\u00e2nd se face apel la ma\u0219ina virtual\u0103<\/a>. Esen\u021ba vulnerabilit\u0103\u021bii const\u0103 \u00een faptul c\u0103 utilitarul qvm-copy-to-vm pentru a afi\u0219a informa\u021bii despre eroare lansa programele kdialog sau zenity, utiliz\u00e2nd func\u021bia system() \u0219i introduc\u00e2nd informa\u021biile despre fi\u0219ierul care a e\u0219uat la copiere \u00een lista de op\u021biuni din linia de comand\u0103. \u00cen acest proces, cur\u0103\u021barea numelui fi\u0219ierului era limitat\u0103 la eliminarea caracterelor non-ASCII \u0219i ghilimelelor duble f\u0103r\u0103 a verifica existen\u021ba caracterelor speciale interpretate de shell, cum ar fi «`» \u0219i «$». <\/p>\n

Dup\u0103 finalizarea copiei fi\u0219ierelor din sistemul gazd\u0103, procesorul din ma\u0219ina virtual\u0103 trimite \u00eenapoi o confirmare a opera\u021biunii, \u00een care, printre altele, se specific\u0103 numele ultimului fi\u0219ier primit. Atacul const\u0103 \u00een returnarea codului de eroare \u00een loc de confirmare \u0219i specificarea pentru fi\u0219ierul care nu a putut fi copiat, a unui nume cu caractere speciale interpretate de shell. Dup\u0103 primirea erorii, procesorul din mediul gazd\u0103 va lansa cu comanda system() utilitarul pentru a ar\u0103ta dialogul cu textul erorii, transmit\u00e2nd \u00een linia de comand\u0103 numele fi\u0219ierului returnat de atacator (de exemplu, dac\u0103 se indic\u0103 «file`id`», pe partea gazdei va fi lansat\u0103 comanda id).
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043d\u0430 \u0441\u0442\u043e\u0440\u043e\u043d\u0435 \u0445\u043e\u0441\u0442\u043e\u0432\u043e\u0433\u043e \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f (Dom0) \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043d\u0430\u0434 \u0432\u0441\u0435\u0439 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183295","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\n","aioseo_head_json":{"title":"\ud83e\udd47Vulnerabilitate \u00een sistemul de operare Qubes, care permite ocolirea izol\u0103rii \u0219i executarea 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