DNSJava affected by KeyTrap - NSEC3 closest encloser proof can exhaust CPU resources
Priority LOW 38CWE-400Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-400.
Summary
### Impact Users using the `ValidatingResolver` for DNSSEC validation can run into CPU exhaustion with specially crafted DNSSEC-signed zones. ### Patches Users should upgrade to dnsjava v3.6.0 ### Workarounds Although not recommended, only using a non-validating resolver, will remove the vulnerability. ### References https://www.athene-center.de/en/keytrap
Why it matters now
Fix Fixed dnsjava:dnsjava (Maven): 3.6.0
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 |
|---|---|---|---|---|---|
| — | dnsjava:dnsjava (Maven) | 3.5.0 to before 3.6.0 | 3.6.0 | Patch available | GHSA-mmwx-rj87-vfgr |
| — | org.jitsi:dnssecjava (Maven) | up to 2.0.0 | — | No fix listed | GHSA-mmwx-rj87-vfgr |
- dnsjava:dnsjava (Maven) Vendor— Affected 3.5.0 to before 3.6.0 Fixed in 3.6.0 Patch available GHSA-mmwx-rj87-vfgr
- org.jitsi:dnssecjava (Maven) Vendor— Affected up to 2.0.0 Fixed in — No fix listed GHSA-mmwx-rj87-vfgr
Remediation
- Fix · GHSA-mmwx-rj87-vfgr dnsjava:dnsjava (Maven) Fixed in 3.6.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-mmwx-rj87-vfgr
References
Advisory 2
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences