CVE-2009-4008
UnknownEPSS 2.67%
Last modified
CVE-2009-4008 is a vulnerability of currently unknown severity. Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified query, which allows remote attackers to cause a denial of service (DNSSEC outage) via a crafted query.. EPSS estimates a 2.67% chance of exploitation in the next 30 days.
Description
Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified query, which allows remote attackers to cause a denial of service (DNSSEC outage) via a crafted query.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nlnetlabs | Unbound | <= 1.4.3 |
| Nlnetlabs | Unbound | 0.0 |
| Nlnetlabs | Unbound | 0.1 |
| Nlnetlabs | Unbound | 0.2 |
| Nlnetlabs | Unbound | 0.3 |
| Nlnetlabs | Unbound | 0.4 |
| Nlnetlabs | Unbound | 0.5 |
| Nlnetlabs | Unbound | 0.6 |
| Nlnetlabs | Unbound | 0.7 |
| Nlnetlabs | Unbound | 0.7.1 |
| Nlnetlabs | Unbound | 0.7.2 |
| Nlnetlabs | Unbound | 0.8 |
| Nlnetlabs | Unbound | 0.09 |
| Nlnetlabs | Unbound | 0.10 |
| Nlnetlabs | Unbound | 0.11 |
| Nlnetlabs | Unbound | 1.0.0 |
| Nlnetlabs | Unbound | 1.0.1 |
| Nlnetlabs | Unbound | 1.0.2 |
| Nlnetlabs | Unbound | 1.1.0 |
| Nlnetlabs | Unbound | 1.1.1 |
| Nlnetlabs | Unbound | 1.2.0 |
| Nlnetlabs | Unbound | 1.2.1 |
| Nlnetlabs | Unbound | 1.3.0 |
| Nlnetlabs | Unbound | 1.3.1 |
| Nlnetlabs | Unbound | 1.3.2 |
| Nlnetlabs | Unbound | 1.3.3 |
| Nlnetlabs | Unbound | 1.3.4 |
| Nlnetlabs | Unbound | 1.4.0 |
| Nlnetlabs | Unbound | 1.4.1 |
| Nlnetlabs | Unbound | 1.4.2 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2009-4008?
Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified query, which allows remote attackers to cause a denial of service (DNSSEC outage) via a crafted query.
How severe is CVE-2009-4008?
Severity scoring for CVE-2009-4008 is pending analysis. The EPSS model estimates a 2.67% probability of exploitation in the next 30 days.
How do I fix CVE-2009-4008?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2009-4008?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST