Ensure ICMP is restricted for untrusted interfaces

高レベル 1自動cisco-asa

説明

Allows ICMP traffic for specific hosts or subnets and denies ICMP traffic for all other sources. ICMP is an important troubleshooting tool that can also be used to perform ICMP attacks on untrusted interfaces. For these interfaces, the ICMP traffic should be allowed only for specific hosts or subnets that are trusted by the Enterprise and should be ... Audited against the output of 'show running-config' (run 'terminal pager 0' first; 'more system:running-config' also works and shows unmasked secrets).

チェック方法

監査方法: 設定パターン

パターン: (?m)^icmp deny any \S+

修正方法

修正方法: ガイダンスまたは IaC パッチ

! - Step 1: Acquire the untrusted interface name <untrusted_interface_name>, the trusted subnet and corresponding subnet mask - Step 2: Run the following command to allow ICMP from the trusted subnet to the untrusted interface. Repeat the command if there are more than one trusted subnets identified. icmp permit <subnet> <mask> <untrusted_interface_name> - Step 3: Run the following command to deny ICMP from all other sources to the untrusted interface. icmp deny any<untrusted_interface_name>

プロパティ

オペレーティングシステム: すべて
タグ: cisco-asanetworkmanagement-plane
参照: CIS Cisco ASA 9.x Firewall Benchmark v1.1.0 - 2.5 Ensure ICMP is restricted for untrusted interfaces

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target cisco-asa