CVE-2019-3806 : An issue has been found in PowerDNS Recursor versions after 4.1.3 before 4.1.9 where Lua hooks are not properly applied

An issue has been found in PowerDNS Recursor versions after 4.1.3 before 4.1.9 where Lua hooks are not properly applied to queries received over TCP in some specific combination of settings, possibly bypassing security policies enforced using Lua.

Published 2019-01-29 17:29:00

Updated 2020-10-19 17:45:59

Source Red Hat, Inc.

View at NVD, CVE.org

Threat overview for CVE-2019-3806

Top countries where our scanners detected CVE-2019-3806

Top open port discovered on systems with this issue 53

IPs affected by CVE-2019-3806 173

Threat actors abusing to this issue? Yes

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^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2019-3806

Probability of exploitation activity in the next 30 days: 0.18%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 54 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2019-3806

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P	8.6	6.4	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
5.4	MEDIUM	CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:H	1.2	4.2	Red Hat, Inc.
Attack Vector: Network Attack Complexity: High Privileges Required: Low User Interaction: Required Scope: Unchanged Confidentiality: Low Integrity: None Availability: High
8.1	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	2.2	5.9	NIST
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2019-3806

CWE-358 Improperly Implemented Security Check for Standard

The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

Assigned by: secalert@redhat.com (Secondary)

References for CVE-2019-3806

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2019-01.html

PowerDNS Security Advisory 2019-01: Lua hooks are not applied in certain configurations — PowerDNS Recursor documentation
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3806

1669421 – (CVE-2019-3806) CVE-2019-3806 pdns-recursor: Lua hooks are not applied in certain configuration
Issue Tracking;Third Party Advisory

Products affected by CVE-2019-3806