Vulnerability CVE-2018-6918
Published: 2018-04-04

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.

Type:

CWE-835

 (Loop with Unreachable Exit Condition ('Infinite Loop'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Freebsd -> Freebsd 

 References:
http://seclists.org/fulldisclosure/2019/Jun/6
http://www.securityfocus.com/bid/103666
http://www.securitytracker.com/id/1040628
https://seclists.org/bugtraq/2019/May/77
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.asc
https://support.apple.com/kb/HT210090
https://support.apple.com/kb/HT210091
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