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CVE-2019-6258

9.8 · CRITICAL

D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress data in a /HNAP1/SetClientInfo HNAP protocol message, which is mishandled in /usr/sbin/u…

Published Aug 18, 2020CWE-120EPSS 2.62%

Overview

CVE-2019-6258 is a critical-severity vulnerability. It was published on August 18, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress data in a /HNAP1/SetClientInfo HNAP protocol message, which is mishandled in /usr/sbin/udhcpd during reading of the /var/servd/LAN-1-udhcpd.conf file.

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

GitHubgithub.com/pr0v3rbs/CVE/tree/master/CVE-2019-6258Refsupportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10175GitHubgithub.com/pr0v3rbs/CVE/tree/master/CVE-2019-6258Refsupportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10175

How CyberStrike helps

Frequently asked questions

What is CVE-2019-6258?

CVE-2019-6258 is a critical-severity vulnerability. It was published on August 18, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2019-6258?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-6258?

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-2019-6258?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-6258 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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