Ensure packet fragments are restricted for untrusted interfaces

YüksekDüzey 1Otomatikcisco-asa

Açıklama

Sets the security appliance to drop fragmented packets received on the untrusted interface. Attackers use fragmentation to evade security systems such as firewalls or IPS because the checks are usually performed on the first fragment. They can then put malicious payload in the other fragments to perform DoS against internal systems. Audited against the output of 'show running-config' (run 'terminal pager 0' first; 'more system:running-config' also works and shows unmasked secrets).

Nasıl denetlenir

Denetim yöntemi: Yapılandırma deseni

Desen: (?m)^fragment chain 1 \S+

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

! - Step 1: Acquire the name of the untrusted interface <interface_name> - Step 2: Run the following command to deny fragments on the interface. fragment chain 1 <interface_name>

Özellikler

İşletim sistemleri: Herhangi biri
Etiketler: cisco-asanetworkmanagement-plane
Referans: CIS Cisco ASA 9.x Firewall Benchmark v1.1.0 - 3.3 Ensure packet fragments are restricted for untrusted interfaces

Bu ana makineyi denetle

Bunu denetleme izniniz olan bir makinede çalıştırın. Tarama salt okunurdur.

shell

tmaegis scan --target cisco-asa