What is CVE-2018-1046?

CVE-2018-1046 is a high-severity vulnerability in Powerdns Pdns, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2018-07-16.

How severe is CVE-2018-1046?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Powerdns Pdns

CVE-2018-1046

pdns before version 4.1.2 is vulnerable to a buffer overflow in dnsreplay. In the dnsreplay tool provided with PowerDNS Authoritative, replaying a specially crafted PCAP file can trigger a stack-based buffer overflow, leading to a crash and potentially arbitrary code execution. This buffer overflow only occurs when the -ecs-stamp option of dnsreplay is used.

Vulnerability class: Buffer Overflow

Published 2018-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Powerdns Pdns
[Unknown] Pdns — versions pdns 4.1.2

Weakness classification (CWE)

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-1046?: CVE-2018-1046 is a high-severity vulnerability in Powerdns Pdns, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2018-07-16.
How severe is CVE-2018-1046?: High severity. CVSS v3 base score is 7.8 out of 10.