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TI-2003-00684 Aliases CVE-2003-0740GHSA-94h5-4g3p-4v6g

Stunnel 4.00, and 3.24 and earlier, leaks a privileged file descriptor returned by…

Priority LOW 22Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.007 53rd percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 23

CPEVersionsRoleVendor
cpe:2.3:a:stunnel:stunnel:3.3:*:*:*:*:*:*:*3.3VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.4a:*:*:*:*:*:*:*3.4aVulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.7:*:*:*:*:*:*:*3.7VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.8:*:*:*:*:*:*:*3.8VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.9:*:*:*:*:*:*:*3.9VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.10:*:*:*:*:*:*:*3.10VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.11:*:*:*:*:*:*:*3.11VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.12:*:*:*:*:*:*:*3.12VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.13:*:*:*:*:*:*:*3.13VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.14:*:*:*:*:*:*:*3.14VulnerableStunnel
  • cpe:2.3:a:stunnel:stunnel:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.4a:*:*:*:*:*:*:* Versions 3.4a Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.7:*:*:*:*:*:*:* Versions 3.7 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.8:*:*:*:*:*:*:* Versions 3.8 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.9:*:*:*:*:*:*:* Versions 3.9 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.10:*:*:*:*:*:*:* Versions 3.10 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.11:*:*:*:*:*:*:* Versions 3.11 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.12:*:*:*:*:*:*:* Versions 3.12 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.13:*:*:*:*:*:*:* Versions 3.13 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.14:*:*:*:*:*:*:* Versions 3.14 Vulnerable ·Stunnel
Show 13 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:stunnel:stunnel:3.15:*:*:*:*:*:*:*3.15VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.16:*:*:*:*:*:*:*3.16VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.17:*:*:*:*:*:*:*3.17VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.18:*:*:*:*:*:*:*3.18VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.19:*:*:*:*:*:*:*3.19VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.20:*:*:*:*:*:*:*3.20VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.21:*:*:*:*:*:*:*3.21VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.21a:*:*:*:*:*:*:*3.21aVulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.21b:*:*:*:*:*:*:*3.21bVulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.21c:*:*:*:*:*:*:*3.21cVulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.22:*:*:*:*:*:*:*3.22VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:3.24:*:*:*:*:*:*:*3.24VulnerableStunnel
cpe:2.3:a:stunnel:stunnel:4.0:*:*:*:*:*:*:*4.0VulnerableStunnel
  • cpe:2.3:a:stunnel:stunnel:3.15:*:*:*:*:*:*:* Versions 3.15 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.16:*:*:*:*:*:*:* Versions 3.16 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.17:*:*:*:*:*:*:* Versions 3.17 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.18:*:*:*:*:*:*:* Versions 3.18 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.19:*:*:*:*:*:*:* Versions 3.19 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.20:*:*:*:*:*:*:* Versions 3.20 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.21:*:*:*:*:*:*:* Versions 3.21 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.21a:*:*:*:*:*:*:* Versions 3.21a Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.21b:*:*:*:*:*:*:* Versions 3.21b Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.21c:*:*:*:*:*:*:* Versions 3.21c Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.22:*:*:*:*:*:*:* Versions 3.22 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:3.24:*:*:*:*:*:*:* Versions 3.24 Vulnerable ·Stunnel
  • cpe:2.3:a:stunnel:stunnel:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Stunnel

Remediation

Red Hat 2 advisories

  • RHSA-2003:296 Released 2003-11-24 · Red Hat rating Important
    : Updated stunnel packages available
    • Red Hat Linux 7.1
    • Red Hat Linux 7.2
    • Red Hat Linux 7.3
    • Red Hat Linux 8.0
  • RHSA-2003:297 Released 2003-11-12 · Red Hat rating Important
    stunnel security update
    • Red Hat Enterprise Linux AS (Advanced Server) version 2.1
    • Red Hat Enterprise Linux ES version 2.1
    • Red Hat Enterprise Linux WS version 2.1
    • Red Hat Linux Advanced Workstation 2.1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AS (Advanced Server) version 2.1 Fixed RHSA-2003:297
Red Hat Enterprise Linux ES version 2.1Fixed RHSA-2003:297
Red Hat Enterprise Linux WS version 2.1Fixed RHSA-2003:297
Red Hat Linux 7.1Fixed RHSA-2003:296
Red Hat Linux 7.2Fixed RHSA-2003:296
Red Hat Linux 7.3Fixed RHSA-2003:296
Red Hat Linux 8.0Fixed RHSA-2003:296
Red Hat Linux Advanced Workstation 2.1Fixed RHSA-2003:297

Timeline

  1. 2026-10-02 Threatist record created from CVE-2003-0740
  2. 2026-10-03 Alias added: GHSA-94h5-4g3p-4v6g

References

Advisory 3

Other 1

  • TI-2011-02592 stunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a… CVSS 2.0HIGH 9.3
  • TI-2001-00060 Format string vulnerability in stunnel 3.8 and earlier allows attackers to execute… CVSS 2.0HIGH 10.0
  • TI-2002-00002 Format string vulnerability in stunnel before 3.22 when used in client mode for (1) smtp… CVSS 2.0HIGH 7.5
  • TI-2021-03525 Improper certificate validation in stunnel CVSS 3.1HIGH 7.5
  • TI-2013-01549 stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are… CVSS 2.0MEDIUM 6.6
  • TI-2008-02320 The OCSP functionality in stunnel before 4.24 does not properly search certificate… CVSS 2.0MEDIUM 6.8
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences