Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| FreeBSD / FreeBSD | affected 13.2-RELEASE before p3; affected 12.4-RELEASE before p5 |
CWE
CWE-167
References
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc
- http://www.openwall.com/lists/oss-security/2023/09/08/5
- http://www.openwall.com/lists/oss-security/2023/09/08/6
- http://www.openwall.com/lists/oss-security/2023/09/08/7
- https://security.netapp.com/advisory/ntap-20231221-0009/
ADP enrichment
No English description supplied.