What’s Vulnerable › Vulnerabilities

CVE-2019-3871

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 12.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-03-21 · updated 2026-06-17
• Weakness: CWE-20

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

Affected products

• Fedoraproject Fedora: 28, 29
• PowerDNS Authoritative Server: before 4.0.7; from 4.1.0 before 4.1.7 — fixed in 4.0.7, 4.1.7

How to fix

Upgrade to a fixed version: PowerDNS Authoritative Server 4.0.7, 4.1.7. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00022.html
• http://www.openwall.com/lists/oss-security/2019/03/18/4
• http://www.securityfocus.com/bid/107491
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3871
• https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2019-03.html
• https://lists.debian.org/debian-lts-announce/2019/03/msg00039.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GWUHF6MRSQ3YO7UUISGLV7MXCAGBW2VD/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROFI6OTWF4GKONNSNEDUCW6LVSSEBZNF/
• https://seclists.org/bugtraq/2019/Apr/8
• https://www.debian.org/security/2019/dsa-4424
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00022.html
• http://www.openwall.com/lists/oss-security/2019/03/18/4

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