Description
In ICMPv6 Neighbor Discovery (ND), the ID is always 0. When pf is configured to allow ND and block incoming Echo Requests, a crafted Echo Request packet after a Neighbor Solicitation (NS) can trigger an Echo Reply. The packet has to come from the same host as the NS and have a zero as identifier to match the state created by the Neighbor Discovery and allow replies to be generated. ICMPv6 packets with identifier value of zero bypass firewall rules written on the assumption that the incoming packets are going to create a state in the state table.
INFO
Published Date :
2024-08-11T02:33:42.590Z
Last Modified :
2024-11-26T15:05:41.535Z
Source :
freebsd
AFFECTED PRODUCTS
The following products are affected by CVE-2024-6640 vulnerability.
| Vendors | Products |
|---|---|
| Freebsd |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2024-6640.
