# CVE-2002-0839

## Summary

- **CVE ID:** CVE-2002-0839
- **Severity:** UNKNOWN
- **CVSS Score:** 0.01
- **CWE:** N/A
- **Published:** Oct 5, 2002
- **Last Modified:** Mar 16, 2026

## Description

The shared memory scoreboard in the HTTP daemon for Apache 1.3.x before 1.3.27 allows any user running as the Apache UID to send a SIGUSR1 signal to any process as root, resulting in a denial of service (process kill) or possibly other behaviors that would not normally be allowed, by modifying the parent[].pid and parent[].last_rtime segments in the scoreboard.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://www.debian.org/security/2002/dsa-188)
- [CNA](http://marc.info/?l=apache-httpd-announce&m=103367938230488&w=2)
- [CNA](http://www.linuxsecurity.com/advisories/other_advisory-2414.html)
- [CNA](ftp://patches.sgi.com/support/free/security/advisories/20021105-01-I)
- [CNA](http://online.securityfocus.com/advisories/4617)
- [CNA](http://www.debian.org/security/2002/dsa-187)
- [CNA](http://marc.info/?l=bugtraq&m=130497311408250&w=2)
- [CNA](http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0012.html)
- [CNA](http://www.apacheweek.com/issues/02-10-04)
- [CNA](http://www.securityfocus.com/bid/5884)
- [CNA](http://www.debian.org/security/2002/dsa-195)
- [CNA](http://marc.info/?l=bugtraq&m=103376585508776&w=2)
- [CNA](http://www.iss.net/security_center/static/10280.php)
- [CNA](http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-068.php)
- [CNA](http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000530)
- [CNA](http://archives.neohapsis.com/archives/bugtraq/2002-10/0254.html)
- [CNA](http://archives.neohapsis.com/archives/bugtraq/2002-10/0195.html)
- [CNA](https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/r5419c9ba0951ef73a655362403d12bb8d10fab38274deb3f005816f5%40%3Ccvs.httpd.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/rd00b45b93fda4a5bd013b28587207d0e00f99f6e3308dbb6025f3b01%40%3Ccvs.httpd.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/r8c9983f1172a3415f915ddb7e14de632d2d0c326eb1285755a024165%40%3Ccvs.httpd.apache.org%3E)
- [CNA](https://lists.apache.org/thread.html/rf2f0f3611f937cf6cfb3b4fe4a67f69885855126110e1e3f2fb2728e%40%3Ccvs.httpd.apache.org%3E)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 34.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._