CVE-2018-1046

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-07-16 · updated 2026-06-17
Weakness: CWE-121

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.

Affected products

The PowerDNS Project pdns: before 4.1.2 — fixed in 4.1.2

How to fix

Upgrade to a fixed version: The PowerDNS Project pdns 4.1.2. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1046
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1046

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