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CVE-2020-17467

9.1 · CRITICAL

An issue was discovered in FNET through 4.6.4.

Published Dec 11, 2020CWE-125EPSS 3.08%

Overview

CVE-2020-17467 is a critical-severity vulnerability. It was published on December 11, 2020 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in FNET through 4.6.4. The code for processing the hostname from an LLMNR request doesn't check for '\0' termination. Therefore, the deduced length of the hostname doesn't reflect the correct length of the actual data. This may lead to Information Disclosure in _fnet_llmnr_poll in fnet_llmnr.c during a response to a malicious request of the DNS class IN.

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

Reffnet.sourceforge.net/manual/fnet_history.htmlCISAus-cert.cisa.gov/ics/advisories/icsa-20-343-01Refwww.kb.cert.org/vuls/id/815128Reffnet.sourceforge.net/manual/fnet_history.htmlCISAus-cert.cisa.gov/ics/advisories/icsa-20-343-01Refwww.kb.cert.org/vuls/id/815128

How CyberStrike helps

Frequently asked questions

What is CVE-2020-17467?

CVE-2020-17467 is a critical-severity vulnerability. It was published on December 11, 2020 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2020-17467?

This vulnerability has a CVSS 3.1 base score of 9.1, 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-2020-17467?

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-2020-17467?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-17467 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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