CVE-2011-4869
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for...
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
Exploit likelihood
What each source reports
NVD Score used
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- Record
CVE-2011-4869- CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- Record
CVE-2011-4869- Updated
- 2026-11-02
EUVDEUVD-2011-4786 No score
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- Record
EUVD-2011-4786- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6xqx-v8qv-h8xm No score
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for...
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- Record
GHSA-6xqx-v8qv-h8xm- Updated
- 2026-11-02
OSV No score
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- Record
CVE-2011-4869- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-4869 No score
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
- Record
DEBIAN-CVE-2011-4869- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
unboundDebian:12 |
before 1.4.14-1 | 1.4.14-1 |
unboundDebian:13 |
before 1.4.14-1 | 1.4.14-1 |
unboundDebian:14 |
before 1.4.14-1 | 1.4.14-1 |
unboundDebian:5.0 From an advisory covering 2 CVEs |
before 1.4.6-1~lenny2, plus listed versions 1.0.2-11.0.2-1+lenny11.0.2-1.11.0.2-1.21.2.1-1 Show 16 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+11.4.6-1~lenny1 |
1.4.6-1~lenny2 |
unboundDebian:6.0 From an advisory covering 2 CVEs |
before 1.4.6-1+squeeze2, plus listed versions 1.4.6-1 |
1.4.6-1+squeeze2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, 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-2011-4869 is a high vulnerability (CVSS 7.8) in Unbound, published December 20, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.99%, the 87th percentile. Fixed in unbound 1.4.14-1.