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Fencer Vulns
medium 5.9

CVE-2018-14663 json

An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the a…

published 2018-11-26 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6558

cvss
5.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record when adding EDNS Client Subnet, might result in the trailing data being smuggled to the backend as a valid record while not seen by dnsdist. This is an issue when dnsdist is deployed as a DNS Firewall and used to filter some records that should not be received by the backend. This issue occurs only when either the 'useClientSubnet' or the experimental 'addXPF' parameters are used when declaring a new backend.

Patch / fix

  • dnsdist Debian 14, Debian 13, Debian 12 1.3.3-1

debian advisories DEBIAN-CVE-2018-14663

  • dnsdist SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.5 +1 more 1.8.0-150400.9.3.1
  • luajit SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +5 more 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
  • dnsdist SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES 15 SP3-LTSS +2 more 1.8.0-150100.3.5.1

suse advisories SUSE-SU-2023:2760-1SUSE-SU-2023:2760-2SUSE-SU-2023:2777-1

  • dnsdist openSUSE Tumbleweed 1.8.0~rc1-1.1

opensuse advisories openSUSE-SU-2024:12731-1

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-2018-14663 updated cvss 5.9

dnsdist: Record smuggling when adding ECS or XPF

  • 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

2.57% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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

  • [UNKNOWN] dnsdist

Classification

Weakness
  • CWE-20 Improper Input Validation

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.