THREATPORT/VULNERABILITY/CVE-2018-6918
HIGH SEVERITY

CVE-2018-6918

Freebsd vulnerability

CVSS
7.5
EPSS
4.4%
EPSS pct
90th
Exploited
No known
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.
Affected vendor
Freebsd
Affected product
Freebsd
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)
Published
2018-04-04

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 4.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2018-6918

  • Confirm whether Freebsd Freebsd is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-6918.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-6918

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-6918 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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