CVE-2018-6918

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.42% Top 15%
Vendor Advisory FreeBSD.org
Affected: FreeBSD FreeBSD
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1040628 vdb entry third party advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.asc vendor advisory
http://www.securityfocus.com/bid/103666 vdb entry third party advisory
https://support.apple.com/kb/HT210090
https://seclists.org/bugtraq/2019/May/77 mailing list
http://seclists.org/fulldisclosure/2019/Jun/6 mailing list
https://support.apple.com/kb/HT210091

Frequently Asked Questions

What is the severity of CVE-2018-6918?
CVE-2018-6918 has been scored as a high severity vulnerability.
How to fix CVE-2018-6918?
To fix CVE-2018-6918, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-6918 being actively exploited in the wild?
It is possible that CVE-2018-6918 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-6918?
CVE-2018-6918 affects FreeBSD FreeBSD.
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