CVE-2018-6918

Q: How do I fix CVE-2018-6918?

Upgrade freebsd to 11.1 or later.

Q: Is CVE-2018-6918 being actively exploited?

Not that we know of. CVE-2018-6918 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 4.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 90% of all scored CVEs.

Q: How severe is CVE-2018-6918?

CVE-2018-6918 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2018-6918 affect?

Published advisories record a fix for freebsd (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 90th pctl

7.5

CVSS v3

NVD

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.

CWE-835

How to fix

Remediation Available

freebsdNVD

Affected:>= 11.0, < 11.1Fixed in:11.1CVE-2018-6918derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

4.38%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Vendor Advisory1

security.freebsd.org

Third-Party Advisory2

Other references4

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	87%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2024-20353	High	8.6	71%	KEV	-
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix

Common questions

How do I fix CVE-2018-6918?

Upgrade freebsd to 11.1 or later.

Is CVE-2018-6918 being actively exploited?

Not that we know of. CVE-2018-6918 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 4.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 90% of all scored CVEs.

How severe is CVE-2018-6918?

CVE-2018-6918 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-6918 affect?

Published advisories record a fix for freebsd (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.