CVE catalog

CVE-2002-1563

stunnel4: CVE-2002-1563

Severity: Medium
Published: May 12, 2003, 4:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.34% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	stunnel4	trixie	`3:5.74-2`	fixed
Debian	stunnel4	bookworm	`3:5.68-2+deb12u1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	stunnel4	source	trixie	`4.04-1`	not yet assigned	Not reported	Not reported
Debian	stunnel4	source	bookworm	`4.04-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[stunnel4]Fixed
Details (2)
- 3:5.68-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 4.04-1
  dsa · stunnel4 · debian · bookworm; dsa · stunnel4 · debian · 12
- 3:5.68-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 4.04-1
  dsa · stunnel4 · debian · bookworm; dsa · stunnel4 · debian · 12

[Debian 13 (Trixie)]

[stunnel4]Fixed
Details (2)
- 3:5.74-2 · amd64 · trixie
  Fixed · Fixed: 4.04-1
  dsa · stunnel4 · debian · 13
- 3:5.74-2 · arm64 · trixie
  Fixed · Fixed: 4.04-1
  dsa · stunnel4 · debian · 13

Observed: Oct 23, 2026, 4:28:48 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]