Back
CVE-2016-6172
PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion…
Medium6.8EPSS 3.8%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion and secondary DNS server crash) via a large (1) AXFR or (2) IXFR response.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.8 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.8% · top 9.9% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
n/a
- affected n/a
References (11)
- https://doc.powerdns.com/md/changelog/#powerdns-authoritative-server-401 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3664 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 1036242 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- [oss-security] 20160706 Malicious primary DNS servers can crash secondaries (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://github.com/PowerDNS/pdns/issues/4128 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/PowerDNS/pdns/issues/4133 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 91678 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [dns-operations] 20160704 DNS activities in Japan (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://github.com/PowerDNS/pdns/pull/4134 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:2116 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://github.com/sischkg/xfer-limit/blob/master/README.md (opens in a new tab)x_refsource_MISCx_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)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2016-6172)Record last updated .