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Fencer Intel
medium 5.3

CVE-2016-7073 json

An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in…

published 2018-09-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-7953

cvss
5.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-the-middle to alter the content of an AXFR because of insufficient validation of TSIG signatures. A missing check of the TSIG time and fudge values was found in AXFRRetriever, leading to a possible replay attack.

Patch / fix

  • powerdns authoritative 3.4.11, 4.0.2
  • powerdns recursor 3.7.4, 4.0.4
  • pdns Debian 14, Debian 13, Debian 12 4.0.2-1
  • pdns-recursor Debian 14, Debian 13, Debian 12 4.0.4-1

debian advisories DEBIAN-CVE-2016-7073

  • pdns openSUSE Tumbleweed 4.5.1-1.5

opensuse advisories openSUSE-SU-2024:11156-1

  • pdns Alpine 3.5 4.0.3-r0
  • pdns-recursor Alpine 3.5 4.0.4-r0

alpine advisories ALPINE-CVE-2016-7073

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • powerdns Arch Linux 4.0.2-1
  • powerdns-recursor Arch Linux 4.0.4-1

arch linux advisories AVG-147AVG-148

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-2016-7073 updated cvss 5.3

pdns: Insufficient validation of TSIG signatures

  • 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

1.23% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Open-Xchange pdns

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel 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.