#VU32138 Integer overflow in PowerDNS - CVE-2016-2120
Published: November 1, 2018 / Updated: July 28, 2020
Vulnerability identifier: #VU32138
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2016-2120
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
PowerDNS
PowerDNS
Software vendor:
PowerDNS.COM B.V.
PowerDNS.COM B.V.
Description
The vulnerability allows a remote authenticated user to perform a denial of service (DoS) attack.
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.
Remediation
Install update from vendor's website.