CVE-2016-2118

Las implementaciones de protocolo MS-SAMR y MS-LSAD en Samba 3.x y 4.x en versiones anteriores a 4.2.11, 4.3.x en versiones anteriores a 4.3.8 y 4.4.x en versiones anteriores a 4.4.2 no maneja correctamente las conexiones DCERPC, lo que permite a atacantes man-in-the-middle llevar a cabo ataques de desactualización de protocolo y hacerse pasar por usuarios modificando el flujo de datos cliente-servidor, también conocida como "BADLOCK".

A protocol flaw, publicly referred to as Badlock, was found in the Security Account Manager Remote Protocol (MS-SAMR) and the Local Security Authority (Domain Policy) Remote Protocol (MS-LSAD). Any authenticated DCE/RPC connection that a client initiates against a server could be used by a man-in-the-middle attacker to impersonate the authenticated user against the SAMR or LSA service on the server. As a result, the attacker would be able to get read/write access to the Security Account Manager database, and use this to reveal all passwords or any other potentially sensitive information in that database.