CVE-2023-4809
Summary
| CVE | CVE-2023-4809 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2023-09-06 20:15:00 UTC |
| Updated | 2023-09-12 15:50:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: NVD-CWE-Other
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Freebsd | Freebsd | All | All | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | - | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | p3 | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | p4 | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | rc2-p1 | All | All |
| Operating System | Freebsd | Freebsd | 12.4 | rc2-p2 | All | All |
| Operating System | Freebsd | Freebsd | 13.2 | - | All | All |
| Operating System | Freebsd | Freebsd | 13.2 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 13.2 | p2 | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| oss-security - CVE-2023-4809: FreeBSD pf bypass when using IPv6 | MISC | www.openwall.com | |
| security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc | MISC | security.FreeBSD.org | |
| oss-security - Re: CVE-2023-4809: FreeBSD pf bypass when using IPv6 | MISC | www.openwall.com | |
| oss-security - Re: CVE-2023-4809: FreeBSD pf bypass when using IPv6 | MISC | www.openwall.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.