CVE-2024-8418: Containers/aardvark-dns: tcp query handling flaw in aardvark-dns leading to denial of service

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-09-04 · updated 2026-10-21
Weakness: CWE-400

Description

A flaw was found in Aardvark-dns, which is vulnerable to a Denial of Service attack due to the serial processing of TCP DNS queries. An attacker can exploit this flaw by keeping a TCP connection open indefinitely, causing the server to become unresponsive and resulting in other DNS queries timing out. This issue prevents legitimate users from accessing DNS services, thereby disrupting normal operations and causing service downtime.

Affected products

containers aardvark-dns: 1.12.0, 1.12.1

References

https://access.redhat.com/errata/RHSA-2025:7094
https://access.redhat.com/security/cve/CVE-2024-8418
https://bugzilla.redhat.com/show_bug.cgi?id=2309683
https://github.com/containers/aardvark-dns/issues/500
https://github.com/containers/aardvark-dns/pull/503

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