Heap-based buffer overflow in OpenConnect 3.18 allows remote servers to cause a denial of…
Priority LOW 38CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Heap-based buffer overflow in OpenConnect 3.18 allows remote servers to cause a denial of service via a crafted greeting banner.
Why it matters now
EPSS 0.02295 83rd percentileScored 2026-11-07
Fix No fix listed 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 · 27
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:infradead:openconnect:*:*:*:*:*:*:*:* | up to 3.17 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:1.00:*:*:*:*:*:*:* | 1.00 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:1.10:*:*:*:*:*:*:* | 1.10 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:1.20:*:*:*:*:*:*:* | 1.20 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:1.30:*:*:*:*:*:*:* | 1.30 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:1.40:*:*:*:*:*:*:* | 1.40 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.00:*:*:*:*:*:*:* | 2.00 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.01:*:*:*:*:*:*:* | 2.01 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.10:*:*:*:*:*:*:* | 2.10 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.11:*:*:*:*:*:*:* | 2.11 | Vulnerable | Infradead |
- cpe:2.3:a:infradead:openconnect:*:*:*:*:*:*:*:* Versions up to 3.17 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:1.00:*:*:*:*:*:*:* Versions 1.00 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:1.10:*:*:*:*:*:*:* Versions 1.10 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:1.20:*:*:*:*:*:*:* Versions 1.20 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:1.30:*:*:*:*:*:*:* Versions 1.30 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:1.40:*:*:*:*:*:*:* Versions 1.40 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.00:*:*:*:*:*:*:* Versions 2.00 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.01:*:*:*:*:*:*:* Versions 2.01 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.10:*:*:*:*:*:*:* Versions 2.10 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.11:*:*:*:*:*:*:* Versions 2.11 Vulnerable ·Infradead
Show 17 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:infradead:openconnect:2.12:*:*:*:*:*:*:* | 2.12 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.20:*:*:*:*:*:*:* | 2.20 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.21:*:*:*:*:*:*:* | 2.21 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.22:*:*:*:*:*:*:* | 2.22 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.23:*:*:*:*:*:*:* | 2.23 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.24:*:*:*:*:*:*:* | 2.24 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.25:*:*:*:*:*:*:* | 2.25 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:2.26:*:*:*:*:*:*:* | 2.26 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.00:*:*:*:*:*:*:* | 3.00 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.01:*:*:*:*:*:*:* | 3.01 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.02:*:*:*:*:*:*:* | 3.02 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.11:*:*:*:*:*:*:* | 3.11 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.12:*:*:*:*:*:*:* | 3.12 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.13:*:*:*:*:*:*:* | 3.13 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.14:*:*:*:*:*:*:* | 3.14 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.15:*:*:*:*:*:*:* | 3.15 | Vulnerable | Infradead |
| cpe:2.3:a:infradead:openconnect:3.16:*:*:*:*:*:*:* | 3.16 | Vulnerable | Infradead |
- cpe:2.3:a:infradead:openconnect:2.12:*:*:*:*:*:*:* Versions 2.12 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.20:*:*:*:*:*:*:* Versions 2.20 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.21:*:*:*:*:*:*:* Versions 2.21 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.22:*:*:*:*:*:*:* Versions 2.22 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.23:*:*:*:*:*:*:* Versions 2.23 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.24:*:*:*:*:*:*:* Versions 2.24 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.25:*:*:*:*:*:*:* Versions 2.25 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:2.26:*:*:*:*:*:*:* Versions 2.26 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.00:*:*:*:*:*:*:* Versions 3.00 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.01:*:*:*:*:*:*:* Versions 3.01 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.02:*:*:*:*:*:*:* Versions 3.02 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.11:*:*:*:*:*:*:* Versions 3.11 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.12:*:*:*:*:*:*:* Versions 3.12 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.13:*:*:*:*:*:*:* Versions 3.13 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.14:*:*:*:*:*:*:* Versions 3.14 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.15:*:*:*:*:*:*:* Versions 3.15 Vulnerable ·Infradead
- cpe:2.3:a:infradead:openconnect:3.16:*:*:*:*:*:*:* Versions 3.16 Vulnerable ·Infradead
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2012-3291
- 2026-10-03 Alias added: GHSA-6578-wffp-8556
References
More Infradead Openconnect vulnerabilities
- TI-2020-10191 OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash)… CVSS 3.1CRITICAL 9.8
- TI-2019-12221 process_http_response in OpenConnect before 8.05 has a Buffer Overflow when a malicious… CVSS 3.1CRITICAL 9.8
- TI-2013-05832 OpenConnect VPN client with GnuTLS before 5.02 contains a heap overflow if MTU is increased on reconnection. CVSS 3.1CRITICAL 9.8
- TI-2020-09740 OpenConnect through 8.08 mishandles negative return values from X509_check_ function… CVSS 3.1MEDIUM 5.9
- TI-2010-03706 OpenConnect before 2.25 does not properly validate X.509 certificates, which allows… CVSS 2.0MEDIUM 6.4
- TI-2012-05090 Multiple stack-based buffer overflows in http.c in OpenConnect before 4.08 allow remote… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2012-3291 · CVE Program
- CVE-2012-3291 · NVD
- FIRST EPSS
- GHSA-6578-wffp-8556 · GitHub Advisory Database · CC BY 4.0
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