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CVE-2019-6470

6.5 · MEDIUM

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode.

Published Nov 1, 2019EPSS 8.81%

Overview

CVE-2019-6470 is a medium-severity vulnerability. It was published on November 1, 2019 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All releases of dhcpd from ISC contain copies of this, and other, BIND libraries in combinations that have been tested prior to release and are known to not present issues like this. Some third-party packagers of ISC software have modified the dhcpd source, BIND source, or version matchup in ways that create the crash potential. Based on reports available to ISC, the crash probability is large and no analysis has been done on how, or even if, the probability can be manipulated by an attacker. Affects: Builds of dhcpd versions prior to version 4.4.1 when using BIND versions 9.11.2 or later, or BIND versions with specific bug fixes backported to them. ISC does not have access to comprehensive version lis

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2019:2060Refaccess.redhat.com/errata/RHSA-2019:3525Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=896122Reflists.opensuse.org/opensuse-security-announce/2019-10/msg00048.htmlReflists.opensuse.org/opensuse-security-announce/2019-10/msg00049.htmlRefaccess.redhat.com/errata/RHSA-2019:2060Refaccess.redhat.com/errata/RHSA-2019:3525Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=896122Reflists.opensuse.org/opensuse-security-announce/2019-10/msg00048.htmlReflists.opensuse.org/opensuse-security-announce/2019-10/msg00049.html

How CyberStrike helps

Frequently asked questions

What is CVE-2019-6470?

CVE-2019-6470 is a medium-severity vulnerability. It was published on November 1, 2019 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2019-6470?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-6470?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-6470?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-6470 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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