ppp utility in FreeBSD 4.1.1 and earlier does not properly restrict access as specified by the nat deny_incoming command, which allows remote attackers to connect to the target system.
| Name | Vendor | Start Version | End Version | 
|---|---|---|---|
| Freebsd | Freebsd | 3.5 (including) | 3.5 (including) | 
| Freebsd | Freebsd | 3.5.1 (including) | 3.5.1 (including) | 
| Freebsd | Freebsd | 4.0 (including) | 4.0 (including) | 
| Freebsd | Freebsd | 4.1 (including) | 4.1 (including) | 
| Freebsd | Freebsd | 4.1.1-stable (including) | 4.1.1-stable (including) |