CVE-2019-5598: Input Validation

First published: Wed May 15 2019(Updated: )

In FreeBSD 11.3-PRERELEASE before r345378, 12.0-STABLE before r345377, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in pf does not check if the outer ICMP or ICMP6 packet has the same destination IP as the source IP of the inner protocol packet allowing a maliciously crafted ICMP/ICMP6 packet could bypass the packet filter rules and be passed to a host that would otherwise be unavailable.

Credit: secteam@freebsd.org

Affected Software	Affected Version	How to fix
FreeBSD FreeBSD	=11.2
FreeBSD FreeBSD	=11.2-p2
FreeBSD FreeBSD	=11.2-p3
FreeBSD FreeBSD	=11.2-p4
FreeBSD FreeBSD	=11.2-p5
FreeBSD FreeBSD	=11.2-p6
FreeBSD FreeBSD	=11.2-p7
FreeBSD FreeBSD	=11.2-p9
FreeBSD FreeBSD	=11.2-rc3
FreeBSD FreeBSD	=12.0
FreeBSD FreeBSD	=12.0-p1
FreeBSD FreeBSD	=12.0-p3

Remedy

https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.asc

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