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CVE-2018-6918

7.5 · HIGH

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, the length field of the ipsec option header does not count the size of the option header itself, c…

Published Apr 4, 2018CWE-835EPSS 4.21%

Overview

CVE-2018-6918 is a high-severity vulnerability. It was published on April 4, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, the length field of the ipsec option header does not count the size of the option header itself, causing an infinite loop when the length is zero. This issue can allow a remote attacker who is able to send an arbitrary packet to cause the machine to crash.

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

Refseclists.org/fulldisclosure/2019/Jun/6Refwww.securityfocus.com/bid/103666Refwww.securitytracker.com/id/1040628Refseclists.org/bugtraq/2019/May/77Refsecurity.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.ascRefsupport.apple.com/kb/HT210090Refsupport.apple.com/kb/HT210091Refseclists.org/fulldisclosure/2019/Jun/6Refwww.securityfocus.com/bid/103666Refwww.securitytracker.com/id/1040628

How CyberStrike helps

Frequently asked questions

What is CVE-2018-6918?

CVE-2018-6918 is a high-severity vulnerability. It was published on April 4, 2018 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2018-6918?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-6918?

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-2018-6918?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-6918 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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