Total vulnerabilities in the database
In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed. That is, a packet with multiple fragment extension headers would not be recognized as the correct ultimate payload. Instead a packet with multiple IPv6 fragment headers would unexpectedly be interpreted as a fragmented packet, rather than as whatever the real payload is.
As a result, IPv6 fragments may bypass pf firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host.
| Software | From | Fixed in |
|---|---|---|
| freebsd / freebsd | 12.4-rc2-p2 | 12.4-rc2-p2.x |
| freebsd / freebsd | 12.4-rc2-p1 | 12.4-rc2-p1.x |
| freebsd / freebsd | 12.4 | 12.4.x |
| freebsd / freebsd | 12.4-p1 | 12.4-p1.x |
| freebsd / freebsd | 12.4-p2 | 12.4-p2.x |
| freebsd / freebsd | - | 12.4 |
| freebsd / freebsd | 13.2 | 13.2.x |
| freebsd / freebsd | 12.4-p3 | 12.4-p3.x |
| freebsd / freebsd | 13.2-p1 | 13.2-p1.x |
| freebsd / freebsd | 13.0 | 13.2 |
| freebsd / freebsd | 12.4-p4 | 12.4-p4.x |
| freebsd / freebsd | 13.2-p2 | 13.2-p2.x |