Samba 3.0.0 <= 4.0.7 DoS Vulnerability (CVE-2013-4124)

Samba 3.0.x to 4.0.7 are affected by a denial of service attack on authenticated or guest connections.

All current released versions of Samba are vulnerable to a denial of service on an authenticated or guest connection. A malformed packet can cause the smbd server to loop the CPU performing memory allocations and preventing any further service. A connection to a file share, or a local account is needed to exploit this problem, either authenticated or unauthenticated if guest connections are allowed. This flaw is not exploitable beyond causing the code to loop allocating memory, which may cause the machine to exceed memory limits.

Samba versions 3.0.0 through 3.5.21, 3.6.0 through 3.6.16 and 4.0.0 through 4.0.7.

Checks if a vulnerable version is present on the target host.

Update to version 3.5.22, 3.6.17, 4.0.8 or later.