CVE-2016-2120: Debian Linux

Medium severity, CVSS 6.5. EPSS: 2% chance of exploitation in the next 30 days.

An issue has been found in PowerDNS Authoritative Server versions up to and including 3.4.10, 4.0.1 allowing an authorized user to crash the server by inserting a specially crafted record in a zone under their control then sending a DNS query for that record. The issue is due to an integer overflow when checking if the content of the record matches the expected size, allowing an attacker to cause a read past the buffer boundary.

Affected products

• Debian Debian Linux: version 8.0 only
• Powerdns Authoritative: up to and including 3.4.10; from 4.0.0, up to and including 4.0.1

Published 2018-11-01. Last modified 2026-06-17.