CVE-2018-1046

Name: CVE-2018-1046
Creator: NVD / NIST
Published: 2018-07-16T20:29:00.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.41%

Last modified Jun 17, 2026

CVE-2018-1046 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 1.41% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.41%

69.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Powerdns	Pdns	< 4.1.2

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1046Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1046Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jul 16, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1046?

How severe is CVE-2018-1046?

CVE-2018-1046 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.41% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1046?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1046?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST