CVE-2019-5598 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

http://packetstormsecurity.com/files/152934/FreeBSD-Security-Advisory-FreeBSD-SA-19-06.pf.html http://www.securityfocus.com/bid/108395 https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.asc https://security.netapp.com/advisory/ntap-20190611-0001/ https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html https://www.synacktiv.com/posts/systems/icmp-reachable.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5