OpenDoas through 6.8.2, when TIOCSTI is available, allows privilege escalation because of…
Priority HIGH 73CWE-269Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-269.
Summary
OpenDoas through 6.8.2, when TIOCSTI is available, allows privilege escalation because of sharing a terminal with the original session. NOTE: TIOCSTI is unavailable in OpenBSD 6.0 and later, and can be made unavailable in the Linux kernel 6.2 and later.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00637 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
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 · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:opendoas_project:opendoas:*:*:*:*:*:*:*:* | up to 6.8.2 | Vulnerable | Opendoas Project |
- cpe:2.3:a:opendoas_project:opendoas:*:*:*:*:*:*:*:* Versions up to 6.8.2 Vulnerable ·Opendoas Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-28339
- 2026-10-03 Alias added: GHSA-frg3-hpqv-5jmr
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
More Opendoas Project Opendoas vulnerabilities
- TI-2019-15156 In OpenDoas from 6.6 to 6.8 the users PATH variable was incorrectly inherited by… CVSS 3.1HIGH 8.8
Sources
- CVE-2023-28339 · CVE Program
- CVE-2023-28339 · NVD
- FIRST EPSS
- GHSA-frg3-hpqv-5jmr · GitHub Advisory Database · CC BY 4.0
- CVE-2023-28339 · 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