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Fencer Vulns
high 7.5

CVE-2016-5427 in the critical feed json

PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to c…

published 2016-09-21 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-6372

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
63.0%
EPSS 63.0% chance of exploitation in 30 days, percentile 99.2%
public exploits
0
none known

Summary

PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.

Patch / fix

  • pdns Debian 14, Debian 13, Debian 12 4.0.0~alpha1-1

debian advisories DEBIAN-CVE-2016-5427

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-5427 updated cvss 7.5

pdns: Crafted queries can cause unexpected backend load

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

62.98% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.