The UDP implementation in Linux 2.4.x kernels keeps the IP Identification field at 0 for all non-fragmented packets, which could allow remote attackers to determine that a target system is running Linux.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | 2.4.0 (including) | 2.4.0 (including) |
| Linux_kernel | Linux | 2.4.1 (including) | 2.4.1 (including) |
| Linux_kernel | Linux | 2.4.2 (including) | 2.4.2 (including) |
| Linux_kernel | Linux | 2.4.3 (including) | 2.4.3 (including) |
| Linux_kernel | Linux | 2.4.4 (including) | 2.4.4 (including) |
| Linux_kernel | Linux | 2.4.5 (including) | 2.4.5 (including) |
| Linux_kernel | Linux | 2.4.6 (including) | 2.4.6 (including) |
| Linux_kernel | Linux | 2.4.7 (including) | 2.4.7 (including) |
| Linux_kernel | Linux | 2.4.8 (including) | 2.4.8 (including) |
| Linux_kernel | Linux | 2.4.9 (including) | 2.4.9 (including) |
| Linux_kernel | Linux | 2.4.10 (including) | 2.4.10 (including) |
| Linux_kernel | Linux | 2.4.11 (including) | 2.4.11 (including) |
| Linux_kernel | Linux | 2.4.12 (including) | 2.4.12 (including) |
| Linux_kernel | Linux | 2.4.13 (including) | 2.4.13 (including) |
| Linux_kernel | Linux | 2.4.14 (including) | 2.4.14 (including) |
| Linux_kernel | Linux | 2.4.15 (including) | 2.4.15 (including) |
| Linux_kernel | Linux | 2.4.16 (including) | 2.4.16 (including) |
| Linux_kernel | Linux | 2.4.17 (including) | 2.4.17 (including) |
| Linux_kernel | Linux | 2.4.18 (including) | 2.4.18 (including) |