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CVE-2011-4869
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote…
High7.8EPSS 3.0%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 3.0% · top 13% of all CVEs (2 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
n/a
- affected n/a
References (8)
- http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- 47326 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- VU#209659 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- unbound-nsec3-dos(71868) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- DSA-2370 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- FEDORA-2011-17337 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2011-17282 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 77910 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .