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No exploitation reportedFix available

CVE-2019-3871

No exploitation reported by the sources we read.

  • Published2019-03-21
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2019-03-2121:29CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
28.x= 28no fix published
29.x= 29no fix published
Powerdns authoritative server
BranchAffectedFixed in
4.1≥ 4.1.0, < 4.1.74.1.7
4.0< 4.0.74.0.7

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ardana-ansibleSUSE:OpenStack Cloud 9all versions · fixed in 9.0+git.1568821007.4e73730-3.13.3
  • ardana-ansibleSUSE:OpenStack Cloud 8all versions · fixed in 8.0+git.1583432621.24fa60e-3.70.1
  • ardana-ansibleSUSE:HPE Helion OpenStack 8all versions · fixed in 8.0+git.1583432621.24fa60e-3.70.1
  • ardana-barbicanSUSE:OpenStack Cloud 8all versions · fixed in 8.0+git.1585152761.8ef3d61-4.33.1
  • ardana-barbicanSUSE:HPE Helion OpenStack 8all versions · fixed in 8.0+git.1585152761.8ef3d61-4.33.1
  • ardana-dbSUSE:OpenStack Cloud 8all versions · fixed in 8.0+git.1583944923.03cca6c-3.31.1
  • ardana-dbSUSE:HPE Helion OpenStack 8all versions · fixed in 8.0+git.1583944923.03cca6c-3.31.1
  • ardana-horizonSUSE:OpenStack Cloud 9all versions · fixed in 9.0+git.1569869028.8edfc22-3.10.3

174 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-3871 Red Hat Product Security

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

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.06.5known since 2026-10-23
  • NVDCVSS 3.08.8read 2026-10-23
  • NVDCVSS 2.06.5read 2026-10-23
  • CNAweakness (CWE)CWE-20known since 2026-10-23
  • NVDweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score12.6 %read 2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2019-03-21
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-mg3r-wf83-7hqh

Frequently asked questions

What is CVE-2019-3871?

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

Is CVE-2019-3871 actively exploited?

Active exploitation of CVE-2019-3871 has not been confirmed. Its EPSS score was 12.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-3871?

CVE-2019-3871 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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