Servers and applications
CVE-2002-0839
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.
- Severity
- High 7.2
- Published
- 11 Oct 2002
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 17 Oct 2026
- Fixed in
- 1.3.27
- Exploit chance
- 0.9% in the next 30 daysHigher than 61% of CVEs. EPSS by FIRST, 12 Nov 2026
- Attack
- Needs local access · No login needed
- Attacker can
- Read data · Change data · Take it down
- CVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
Apache HTTP ServerServers and applications · cpe:a:apache:http_server |
|