The CheckGroup function in openSkat VTMF before 2.1 generates public key pairs in which…
Priority LOW 23CWE-310Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The CheckGroup function in openSkat VTMF before 2.1 generates public key pairs in which the "p" variable might not be prime, which allows remote attackers to determine the private key and decrypt messages.
Why it matters now
EPSS 0.01673 76th 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 · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:heiko_stamer:openskat:*:*:*:*:*:*:*:* | up to 2.0 | Vulnerable | Heiko Stamer |
- cpe:2.3:a:heiko_stamer:openskat:*:*:*:*:*:*:*:* Versions up to 2.0 Vulnerable ·Heiko Stamer
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2004-2721
- 2026-10-03 Alias added: GHSA-5fhp-v5ch-jvfc
References
Sources
- CVE-2004-2721 · CVE Program
- CVE-2004-2721 · NVD
- FIRST EPSS
- GHSA-5fhp-v5ch-jvfc · GitHub Advisory Database · CC BY 4.0
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