CVE-2014-0239: Samba

Medium severity, CVSS 5.0. EPSS: 66.8% chance of exploitation in the next 30 days.

The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header section of an incoming DNS message before sending a response, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged response packet that triggers a communication loop, a related issue to CVE-1999-0103.

Affected products

• Samba Samba: from 4.0.0, before 4.0.18 (fixed in 4.0.18); from 4.1.0, before 4.1.8 (fixed in 4.1.8)

Published 2014-05-28. Last modified 2026-06-17.