CVE-2014-0178

Samba 3.6.6 hasta 3.6.23, 4.0.x anterior a 4.0.18 y 4.1.x anterior a 4.1.8, cuando cierta configuración de copia shadow vfs está habilitada, no inicializa debidamente el campo de respuesta SRV_SNAPSHOT_ARRAY, lo que permite a usuarios remotos autenticados obtener información potencialmente sensible de la memoria de procesos a través de una solicitud (1) FSCTL_GET_SHADOW_COPY_DATA o (2) FSCTL_SRV_ENUMERATE_SNAPSHOTS.

A flaw was found in the way Samba created responses for certain authenticated client requests when a shadow-copy VFS module was enabled. An attacker able to send an authenticated request could use this flaw to disclose limited portions of memory per each request.

In Samba before 3.6.23, the SAMR server neglects to ensure that attempted password changes will update the bad password count, and does not set the lockout flags. This would allow a user unlimited attempts against the password by simply calling ChangePasswordUser2 repeatedly. This is available without any other authentication. Information leak vulnerability in the VFS code, allowing an authenticated user to retrieve eight bytes of uninitialized memory when shadow copy is enabled. Samba versions before 3.6.24, 4.0.19, and 4.1.9 are vulnerable to a denial of service on the nmbd NetBIOS name services daemon. A malformed packet can cause the nmbd server to loop the CPU and prevent any further NetBIOS ame service. Samba versions before 3.6.24, 4.0.19, and 4.1.9 are affected by a denial of service crash involving overwriting memory on an authenticated connection to the smbd file server. An uninitialized pointer use flaw was found in the Samba daemon (smbd). A malicious Samba client could send specially crafted netlogon packets that, when processed by smbd, could potentially lead to arbitrary code execution with the privileges of the user running smbd (by default, the root user).