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Fencer Vulns
medium 6.5

CVE-2019-3871 json

A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7.

published 2019-03-21 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-13484

cvss
6.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
12.6%
EPSS 12.6% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7. An insufficient validation of data coming from the user when building a HTTP request from a DNS query in the HTTP Connector of the Remote backend, allowing a remote user to cause a denial of service by making the server connect to an invalid endpoint, or possibly information disclosure by making the server connect to an internal endpoint and somehow extracting meaningful information about the response

Patch / fix

  • powerdns authoritative_server 4.0.7, 4.1.7
  • pdns Debian 14, Debian 13, Debian 12 4.1.6-2

debian advisories DEBIAN-CVE-2019-3871

  • pdns OpenStack Cloud 8, HPE Helion OpenStack 8 4.1.2-3.6.1
  • ardana-db OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1583944923.03cca6c-3.31.1
  • ardana-mq OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1583944811.dc14403-3.19.1
  • memcached OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 1.5.17-3.3.1
  • zookeeper OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 3.4.10-3.6.1
  • crowbar-ha OpenStack Cloud Crowbar 8 5.0+git.1585316176.344190f-3.32.1
  • python-amqp OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 2.4.2-3.9.1
  • crowbar-core OpenStack Cloud Crowbar 8 5.0+git.1585575551.16781d00d-3.38.1

suse advisories SUSE-SU-2020:1066-1SUSE-SU-2019:2906-1

  • pdns openSUSE Tumbleweed 4.5.1-1.5
  • pdns Package Hub 15, Package Hub 12 SP1, openSUSE Leap 15.0 4.1.2-bp150.2.6.1

opensuse advisories openSUSE-SU-2024:11156-1openSUSE-SU-2019:1128-1

  • pdns Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 4.1.7-r0
  • pdns Alpine 3.7, Alpine 3.6 4.0.7-r0

alpine advisories ALPINE-CVE-2019-3871

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 4.1.7-1

arch linux advisories AVG-927

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-2019-3871 updated cvss 6.5

pdns: insufficient validation of data when building a HTTP request from a DNS query

  • 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

12.63% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2019/03/18/4 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3871 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • The PowerDNS Project pdns

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.