# CVE-1999-0267: NCSA HTTP daemon buffer overflow in version 1.3

Source: https://junglewise.ai/threats/cve-1999-0267-ncsa-http-daemon-buffer-overflow-in-version-1-3  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 1997-09-23. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-1999-0267 · Severity: high · CVSS 7.5 · Published 1997-09-23

A critical security flaw exists in the NCSA HTTP daemon, an early web server software. This vulnerability allows an outside attacker to take control of the server by sending specially crafted data. Successful exploitation could lead to unauthorized access to sensitive files, data modification, or a complete takeover of the hosting system.

Vendors: [Ncsa](https://junglewise.ai/threats/vendors/ncsa).

## Quick answers

**Is CVE-1999-0267 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-1999-0267 being exploited in the wild.

**How severe is CVE-1999-0267?** High severity, with a CVSS score of 7.5, published 23 September 1997.

**Which products and versions are affected?** Ncsa HTTP daemon 1.3.

**Is there a fix for CVE-1999-0267?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-1999-0267 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-1999-0267?** Check whether you run Ncsa HTTP daemon at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability exists in the NCSA HTTP daemon (httpd) version 1.3. The flaw is rooted in insufficient bounds checking when processing incoming HTTP requests. A remote, unauthenticated attacker can exploit this by sending a maliciously crafted request to the server, leading to memory corruption. This allows the attacker to overwrite the instruction pointer and execute arbitrary commands with the privileges of the user running the web server process.

## Affected products

- NCSA HTTP daemon 1.3

## Timeline

- 1997-09-23: disclosed: NVD Published Date

## References

- [https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0267](https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0267)