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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | FreeBSD | FreeBSD 11.2 before 11.2-RELEASE-p10 and 12.0 before 12.0-RELEASE-p4 | — |
Advisories 2
- WID-SEC-2026-4165 Apple iOS, iPadOS, macOS und Safari: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2026
- NCSC-2026-0456 Kwetsbaarheden verholpen in Apple iOS en iPadOS NCSC-NL (Netherlands) · Oct 27, 2026
References
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.asc
- https://www.synacktiv.com/posts/systems/icmp-reachable.html
- http://packetstormsecurity.com/files/152934/FreeBSD-Security-Advisory-FreeBSD-SA-19-06.pf.html
- 108395 vdb-entry
- https://security.netapp.com/advisory/ntap-20190611-0001/
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html