CVE-2009-4008
Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2009-4008- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2009-4008- Updated
- 2026-11-02
EUVDEUVD-2009-3979No score
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.
- Record
EUVD-2009-3979- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cjjv-pc59-mghfNo score
Unbound before 1.4.4 does not send responses for signed zones after mishandling an unspecified...
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.
- Record
GHSA-cjjv-pc59-mghf- Updated
- 2026-11-02
OSVNo score
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.
- Record
CVE-2009-4008- Updated
- 2026-11-02
OSVDEBIAN-CVE-2009-4008No score
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.
- Record
DEBIAN-CVE-2009-4008- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
unboundDebian:12 | before 1.4.4-1 | 1.4.4-1 |
unboundDebian:13 | before 1.4.4-1 | 1.4.4-1 |
unboundDebian:14 | before 1.4.4-1 | 1.4.4-1 |
unboundDebian:5.0 | before 1.4.6-1~lenny1, plus listed versions 1.0.2-11.0.2-1+lenny11.0.2-1.11.0.2-1.21.2.1-1 Show 15 moreShow less1.2.1-1~bpo40+11.2.1-21.3.0-11.3.2-11.3.3-11.3.4-11.4.0-11.4.1-11.4.1-21.4.2-11.4.3-11.4.4-11.4.5-11.4.5-1~bpo50+11.4.6-1~bpo50+1 | 1.4.6-1~lenny1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-4008 is a medium vulnerability (CVSS 5.0) in Nlnetlabs Unbound, published May 27, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.70%, the 86th percentile. Fixed in unbound 1.4.4-1.