Description
In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an attacker to cause several linked lists to grow unbounded and cause an expensive list traversal on every packet being processed, leading to resource exhaustion and a denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | FreeBSD | FreeBSD 12.0 before 12.0-RELEASE-p6 | — |
References
- [oss-security] 20190617 Linux and FreeBSD Kernel: Multiple TCP-based remote denial of service issues mailing-list
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
- http://packetstormsecurity.com/files/153329/Linux-FreeBSD-TCP-Based-Denial-Of-Service.html
- FreeBSD-SA-19:08 vendor-advisory
- VU#905115 third-party-advisory
- 20190624 FreeBSD Security Advisory FreeBSD-SA-19:08.rack mailing-list
- http://packetstormsecurity.com/files/153378/FreeBSD-Security-Advisory-FreeBSD-SA-19-08.rack.html
- https://support.f5.com/csp/article/K75521003
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
- https://security.netapp.com/advisory/ntap-20190625-0004/