Format string vulnerability in stunnel 3.8 and earlier allows attackers to execute…
Priority MEDIUM 48Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
Format string vulnerability in stunnel 3.8 and earlier allows attackers to execute arbitrary commands via a malformed ident username.
Why it matters now
EPSS 0.02774 86th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:stunnel:stunnel:3.3:*:*:*:*:*:*:* | 3.3 | Vulnerable | Stunnel |
| cpe:2.3:a:stunnel:stunnel:3.4a:*:*:*:*:*:*:* | 3.4a | Vulnerable | Stunnel |
| cpe:2.3:a:stunnel:stunnel:3.7:*:*:*:*:*:*:* | 3.7 | Vulnerable | Stunnel |
| cpe:2.3:a:stunnel:stunnel:3.8:*:*:*:*:*:*:* | 3.8 | Vulnerable | Stunnel |
- 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
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2001-0060
- 2026-10-03 Alias added: GHSA-cpcw-2gx9-xcwx
References
More Stunnel vulnerabilities
- 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-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
- TI-2003-00142 OpenSSL does not use RSA blinding by default, which allows local and remote attackers to… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2001-0060 · CVE Program
- CVE-2001-0060 · NVD
- FIRST EPSS
- GHSA-cpcw-2gx9-xcwx · GitHub Advisory Database · CC BY 4.0
- CVE-2001-0060 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences