CVE catalog

CVE-2003-0740

stunnel4: CVE-2003-0740

Severity: Medium
Published: Oct 20, 2003, 4:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.70% · Oct 25, 2026

Stunnel 4.00, and 3.24 and earlier, leaks a privileged file descriptor returned by listen(), which allows local users to hijack the Stunnel server.

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	`2:4.04`	not yet assigned	Not reported	Not reported
Debian	stunnel4	source	bookworm	`2:4.04`	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: 2:4.04
  dsa · stunnel4 · debian · bookworm; dsa · stunnel4 · debian · 12
- 3:5.68-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2:4.04
  dsa · stunnel4 · debian · bookworm; dsa · stunnel4 · debian · 12

[Debian 13 (Trixie)]

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

Observed: Oct 23, 2026, 5:02:17 PM UTC

References

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