CVE Number – CVE-2018-10918
A vulnerability in Samba could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to insufficient NULL pointer checks on user-supplied input in parameters to DRSUAPI remote procedure call (RPC) requests by the affected software. An attacker could exploit this vulnerability by sending crafted RPC requests to a targeted Active Directory domain controller (AD DC). A successful exploit could lead to a NULL pointer dereference error and cause the AD DC samba process to crash, resulting in a DoS condition.
Samba.org confirmed the vulnerability and released patches.
To exploit this vulnerability, the attacker must be on the same physical or logical network to make crafted RPC requests to a targeted AD DC, making exploitation more difficult in environments that restrict network access from untrusted sources.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
Samba.org released a security announcement at the following link: CVE-2018-10918
Samba.org released patches at the following link: Samba Security Releases
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.