{"id":105611,"date":"2022-11-17T15:36:54","date_gmt":"2022-11-17T13:36:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera"},"modified":"2022-11-17T15:36:54","modified_gmt":"2022-11-17T13:36:54","slug":"uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimost-v-samba-i-mit-heimdal-kerberos-privodyashhaya-k-perepolneniyu-bufera","title":{"rendered":"Vulnerabilidad en Samba y MIT\/Heimdal Kerberos que conduce a un desbordamiento de b\u00fafer.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Se han publicado actualizaciones de seguridad para los paquetes Samba 4.17.3, 4.16.7 y 4.15.12 que corrigen una vulnerabilidad (CVE-2022-42898) en las bibliotecas de Kerberos, que puede causar un desbordamiento de enteros y escritura de datos fuera del b\u00fafer asignado al procesar par\u00e1metros PAC (Privileged Attribute Certificate), enviados por un usuario autenticado. La publicaci\u00f3n de las actualizaciones de los paquetes en las distribuciones se puede seguir en las p\u00e1ginas: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD. <\/p>\n

Adem\u00e1s de Samba, el problema tambi\u00e9n se manifiesta en los paquetes de MIT Kerberos y Heimdal Kerberos. En el informe de vulnerabilidad del proyecto Samba, la amenaza no se detalla, pero el informe de MIT Kerberos menciona que la vulnerabilidad podr\u00eda llevar a la ejecuci\u00f3n remota de c\u00f3digo. La explotaci\u00f3n de la vulnerabilidad es posible \u00fanicamente en sistemas de 32 bits. <\/p>\n

El problema afecta a configuraciones con KDC (Key Distribution Center) o kadmind. En configuraciones sin Active Directory, la vulnerabilidad tambi\u00e9n se manifiesta en los archivos Samba que utilizan Kerberos. como en entornos de nube p\u00fablicos o privados.<\/a> El problema es causado por un error en la funci\u00f3n krb5_parse_pac(), que calcula incorrectamente el tama\u00f1o del b\u00fafer utilizado al analizar los campos PAC. En sistemas de 32 bits, al procesar PAC especialmente formateados, el error podr\u00eda provocar que un bloque de 16 bytes enviado por un atacante se colocara fuera del b\u00fafer asignado.
\n
Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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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 4.17.3, 4.16.7 \u0438 4.15.12 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2022-42898) \u0432 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u0445 Kerberos, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u043c\u0443 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0438 \u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 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