Ensure packet fragments are restricted for untrusted interfaces

ВисокаНиво 1Аутоматскаcisco-asa

Опис

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).

Како се проверава

Метод провере: Образац конфигурације

Образац: (?m)^fragment chain 1 \S+

Како се исправља

Метод исправке: Смерница или закрпа инфраструктуре

! - 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>

Својства

Оперативни системи: Било који
Ознаке: cisco-asanetworkmanagement-plane
Референца: CIS Cisco ASA 9.x Firewall Benchmark v1.1.0 - 3.3 Ensure packet fragments are restricted for untrusted interfaces

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Покрените ово на рачунару за који имате дозволу за проверу. Скенирање ради у режиму само за читање.

shell

tmaegis scan --target cisco-asa