Home/CVE/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 t
CVE

CVE-2018-6918

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 t

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.

HIGH · CVSS 7.5 EPSS 0.02207
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
▤

Affected Products & Versions

2
freebsd>= 10.0 and < 10.4
freebsd>= 11.0 and < 11.1
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.0 · secteam@freebsd.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Apr 2018 · 02:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2019/Jun/6
http://www.securityfocus.com/bid/103666Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040628Third Party AdvisoryVDB Entry
https://seclists.org/bugtraq/2019/May/77
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.ascVendor Advisory
https://support.apple.com/kb/HT210090
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