Kernel Comparison: Linux (2.6.22) versus Windows (Vista)
Security
Security Model
| Security (model) | Linux | Windows |
| security model - Standard Unix Model | Y | N Y (UAC) |
| i.e. immunity from viruses (given common usage15) | Y | N |
| security model - ACL | N Y (SELinux21) | Y |
| security model - AFS ACL | Y | N Y (add-on) |
| security model - POSIX ACL | Y | Y |
| security model - Security Modules (#401, #402) | Y - LSM | Y - CAS |
| user definition - privileges, member groups | Y | Y |
| security is implemented - any object manager object (files, processes...) | N | Y |
| security is implemented - free from object-by-object assignment | N | Y |
Memory Security
| Security (memory) | Linux | Windows |
| NX | Y | Y |
| ASLR | Y | Y |
| PaX | N Y (older kernels) | N Y (pre-Vista) |
Cryptography
Advanced Security
| Security (advanced) | Linux | Windows |
| auditing support | N Y (option) | Y |
| tampering protection | N Y (SELinux37) | Y38 |
| digitally signed remote execution | N | Y49 |
Firewall
| Firewall | Linux | Windows |
| kernel firewall - stateless | Y | N (external) |
| kernel firewall - stateful | Y | N (external) |
Vulnerabilities
| Vulnerabilities (secunia.com) | Linux | Windows |
| Current list | Linux kernel 2.6.x | Microsoft Windows Vista |
| Most critical unpatched - remote (as of 15.5.2007) | None | None |
| Most critical unpatched - all (as of 15.5.2007) | Not critical | Not critical |
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