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Fencer Vulns
low 1.2

CVE-2002-1563 json

stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an in…

published 2003-04-26 23 y ago modified 2026-06-16 4 mo ago also EUVD-2002-1545

cvss
1.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter.

Patch / fix

  • stunnel Debian 14 2:3.24-1
  • stunnel4 Debian 13, Debian 12 4.04-1

debian advisories DEBIAN-CVE-2002-1563

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-2002-1563 updated

security flaw

  • Red Hat Enterprise Linux ES version 2.1 Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2003:223
  • Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0
    fixed: vendor fix RHSA-2003:221
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2003:223

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

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 1.2 AV:L/AC:H/Au:N/C:N/I:N/A:P

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.