Vulnerability Report

CVE-2019-3871

Title: Powerdns Authoritative Server Denial of Service (DoS)

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2019-3871.

CWE Category CWE-20
Published Date Mar 21, 2019
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 6.5 CVSS v3.0
Exploit Probability (EPSS)
12.63%

Vulnerability Summary

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

Impacted Vendors

P
powerdns 1

Reference Links

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 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
CVSS v3.0
Source Entity [email protected]
Severity MEDIUM
6.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVSS v3.0
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:S/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2019-3871 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Affected Stack

No specific products linked.