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Fencer Vulns
high 7.2

CVE-2002-0839 json

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…

published 2002-10-05 24 y ago modified 2026-06-16 4 mo ago also EUVD-2002-0831

cvss
7.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

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.

Patch / fix

  • apache http_server 1.3.27

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2002-0839 updated

security flaw

  • Red Hat Linux 6.2 Red Hat Linux 7.0 Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0
    fixed: vendor fix RHSA-2002:222
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2002:251
  • Red Hat Stronghold 3
    fixed: vendor fix RHSA-2002:243
  • Red Hat Stronghold 4
    fixed: vendor fix RHSA-2002:244
  • Red Hat Stronghold 4 for Red Hat Enterprise Linux
    fixed: vendor fix RHSA-2002:248

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.