# CVE-1999-0035: ftpd race condition in signal handling routine

Source: https://junglewise.ai/threats/cve-1999-0035-ftpd-race-condition-in-signal-handling-routine  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 1997-05-29. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-1999-0035 · Severity: medium · CVSS 5.4 · Published 1997-05-29

A vulnerability exists in the file transfer service (ftpd) that could allow an authenticated user to read or write to unauthorized files on the server. This occurs due to a timing flaw in how the service handles internal signals, potentially leading to the exposure of sensitive data or the modification of system files. Organizations using legacy FTP services should ensure they are patched or migrated to secure alternatives.

Technologies: [Sgi Irix](https://junglewise.ai/threats/technologies/irix). Vendors: [Sgi](https://junglewise.ai/threats/vendors/sgi).

## Quick answers

**Is CVE-1999-0035 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-1999-0035 being exploited in the wild.

**How severe is CVE-1999-0035?** Medium severity, with a CVSS score of 5.4, published 29 May 1997.

**Which products and versions are affected?** unknown ftpd.

**Is there a fix for CVE-1999-0035?** 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-1999-0035 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-1999-0035?** Check whether you run Sgi Irix. 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 race condition (CWE-364) exists within the signal handling routine of the ftpd daemon. By exploiting a timing window during signal processing, a remote authenticated attacker can bypass intended file system permissions. This flaw allows for the unauthorized reading or writing of arbitrary files with the privileges of the FTP process. The vulnerability is reachable over the network but typically requires valid user credentials to interact with the service.

## Affected products

- unknown ftpd

## Timeline

- 1997-05-29: disclosed: Initial NVD publication date

## References

- [https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0035](https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0035)

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