{"id":53107,"date":"2019-11-24T00:00:00","date_gmt":"2019-11-23T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc"},"modified":"2020-02-18T14:00:58","modified_gmt":"2020-02-18T11:00:58","slug":"37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc","title":{"rendered":"37 vulnerabilit\u00e0 in diverse implementazioni di VNC","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pavel Cheremushkin del Laboratorio Kaspersky ha analizzato<\/a><\/noindex> diverse implementazioni del sistema di accesso remoto VNC (Virtual Network Computing) e ha identificato 37 vulnerabilit\u00e0 causate da problemi gestionali della memoria. Le vulnerabilit\u00e0 riscontrate nelle implementazioni dei server VNC possono essere sfruttate solo da un utente autenticato, mentre attacchi a vulnerabilit\u00e0 nel codice client sono possibili quando un utente si connette a un server controllato da un attaccante.<\/p>\n

Il maggior numero di vulnerabilit\u00e0 \u00e8 stato trovato nel pacchetto UltraVNC<\/a><\/noindex>, disponibile solo per la piattaforma Windows. In totale, sono state identificate 22 vulnerabilit\u00e0 in UltraVNC: 13 di esse possono potenzialmente portare all'esecuzione di codice nel sistema, 5 a perdite di contenuto dalla memoria e 4 a un'interruzione del servizio.
\nLe vulnerabilit\u00e0 sono state corrette nella versione 1.2.3.0<\/a><\/noindex>.<\/p>\n

Nella libreria open source LibVNC<\/a><\/noindex> (LibVNCServer e LibVNCClient), sono state identificate 10 vulnerabilit\u00e0. viene utilizzato<\/a><\/noindex> Cinque vulnerabilit\u00e0 (
\nCVE-2018-20020CVE-2018-20019<\/a><\/noindex>, CVE-2018-15127<\/a><\/noindex>, CVE-2018-15126<\/a><\/noindex>, CVE-2018-6307<\/a><\/noindex>, ) sono causate da overflow di buffer e possono potenzialmente portare all'esecuzione di codice. Tre vulnerabilit\u00e0 possono portare a perdite di informazioni, due a interruzioni del servizio.<\/a><\/noindex>Tutti i problemi sono gi\u00e0 stati risolti dagli sviluppatori, ma le modifiche sono attualmente
\nriflettute solo nel ramo master.<\/a><\/noindex> (\u00e8 stato testato un ramo cross-platform obsoleto,<\/p>\n

In TightVNC<\/a><\/noindex> dato che la versione attuale 2.x \u00e8 rilasciata solo per Windows), sono state individuate 4 vulnerabilit\u00e0. Tre problemi ( 1.3<\/a><\/noindex>CVE-2019-15679CVE-2019-15678<\/a><\/noindex>, CVE-2019-8287<\/a><\/noindex>, ) sono causati da overflow di buffer nelle funzioni InitialiseRFBConnection, rfbServerCutText e HandleCoRREBBP, e possono potenzialmente portare all'esecuzione di codice. Un problema (<\/a><\/noindex>CVE-2019-15680) porta a un'interruzione del servizio. Anche se gli sviluppatori di TightVNC erano<\/a><\/noindex>a conoscenza dei problemi gi\u00e0 lo scorso anno, le vulnerabilit\u00e0 rimangono ancora non risolte. informati<\/a><\/noindex> Nel pacchetto cross-platform<\/p>\n

TurboVNC (fork di TightVNC 1.3, che utilizza la libreria libjpeg-turbo), \u00e8 stata trovata solo una vulnerabilit\u00e0 (<\/a><\/noindex> CVE-2019-15683), ma \u00e8 pericolosa e, con accesso autenticato al server, consente di eseguire codice proprio, poich\u00e9 in caso di overflow di buffer \u00e8 possibile controllare l'indirizzo di ritorno. Il problema \u00e8 stato corretto<\/a><\/noindex>il 23 agosto e non si manifesta nella versione attuale.<\/a><\/noindex> Pavel Cheremushkin del Laboratorio Kaspersky ha analizzato diverse implementazioni del sistema di accesso remoto VNC (Virtual Network Computing) e ha identificato 37 vulnerabilit\u00e0 causate da problemi gestionali della memoria. Le vulnerabilit\u00e0 riscontrate nelle implementazioni dei server VNC possono essere sfruttate solo da un utente autenticato, mentre attacchi a vulnerabilit\u00e0 nel codice client sono possibili quando un utente si connette a un server controllato da un attaccante. Il maggior numero di vulnerabilit\u00e0 \u00e8 stato trovato 2.2.3<\/a><\/noindex>.<\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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