CVE-2018-6918 json
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 hea…
published 2018-04-04 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-18662
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.2%
- EPSS 4.2% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- freebsd freebsd 10.4, 11.1
Exploit prediction
4.21% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Affected products
- FreeBSD FreeBSD
Classification
- Weakness
-
- CWE-835 Loop with Unreachable Exit Condition
References
-
security.freebsd.org
/advisories/FreeBSD-SA-18:05.ipsec.asc
vendor-advisory
-
securitytracker.com
/id/1040628
vdb-entry, third-party-advisory
-
securityfocus.com
/bid/103666
vdb-entry, third-party-advisory
- support.apple.com /kb/HT210090
-
seclists.org
/bugtraq/2019/May/77
mailing-list
-
seclists.org
/fulldisclosure/2019/Jun/6
mailing-list
- support.apple.com /kb/HT210091
Sources
- CVE List CVE-2018-6918
- NVD CVE-2018-6918
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.