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CVE-2011-4528
Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows…
Medium5.0EPSS 2.8%
- Published
- Updated
- Reserved
- Assigned by
- certcc
Description
Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
Affected products
n/a
- affected n/a
References (7)
- 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
- 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
- 77909 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- FEDORA-2011-17282 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_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 .