The TCP stack (tcp_input.c) in OpenBSD 3.5 and 3.6 allows remote attackers to cause a denial of service (system panic) via crafted values in the TCP timestamp option, which causes invalid arguments to be used when calculating the retransmit timeout.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openbsd | Openbsd | 2.0 (including) | 2.0 (including) |
| Openbsd | Openbsd | 2.1 (including) | 2.1 (including) |
| Openbsd | Openbsd | 2.2 (including) | 2.2 (including) |
| Openbsd | Openbsd | 2.3 (including) | 2.3 (including) |
| Openbsd | Openbsd | 2.4 (including) | 2.4 (including) |
| Openbsd | Openbsd | 2.5 (including) | 2.5 (including) |
| Openbsd | Openbsd | 2.6 (including) | 2.6 (including) |
| Openbsd | Openbsd | 2.7 (including) | 2.7 (including) |
| Openbsd | Openbsd | 2.8 (including) | 2.8 (including) |
| Openbsd | Openbsd | 2.9 (including) | 2.9 (including) |
| Openbsd | Openbsd | 3.0 (including) | 3.0 (including) |
| Openbsd | Openbsd | 3.1 (including) | 3.1 (including) |
| Openbsd | Openbsd | 3.2 (including) | 3.2 (including) |
| Openbsd | Openbsd | 3.3 (including) | 3.3 (including) |
| Openbsd | Openbsd | 3.4 (including) | 3.4 (including) |
| Openbsd | Openbsd | 3.5 (including) | 3.5 (including) |
| Openbsd | Openbsd | 3.6 (including) | 3.6 (including) |