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CVE-2018-6918

Status Candidate

Overview

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.

Related Files

FreeBSD Security Advisory - FreeBSD-SA-18:05.ipsec
Posted Apr 4, 2018
Authored by Maxime Villard | Site security.freebsd.org

FreeBSD Security Advisory - The length field of the option header does not count the size of the option header itself. This causes a problem when the length is zero, the count is then incremented by zero, which causes an infinite loop. In addition there are pointer/offset mistakes in the handling of IPv4 options. A remote attacker who is able to send an arbitrary packet, could cause the remote target machine to crash.

tags | advisory, remote, arbitrary
systems | freebsd
advisories | CVE-2018-6918
MD5 | d7bfefe5e014e4d4be99e8fd294dc2dc
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