CVE-2016-2120

moderate-risk
Published 2018-11-01

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.

Do I need to act?

-
0.13% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Debian Powerdns

References (4)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2120
Third Party Advisory https://www.debian.org/security/2017/dsa-3764
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2120
Third Party Advisory https://www.debian.org/security/2017/dsa-3764
34
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 7/34 · Low