CCE-94230-0| Platform: cpe:/o:oracle:linux:8, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9 | Date: (C)2019-11-07 (M)2023-07-04 |
To set the default policy to DROP (instead of ACCEPT) for
the built-in INPUT chain which processes incoming packets,
add or correct the following line in
'/etc/sysconfig/iptables':
':INPUT DROP [0:0]'
Parameter:
[yes/no]
Technical Mechanism:
In 'iptables' the default policy is applied only after all
the applicable rules in the table are examined for a match. Setting the
default policy to 'DROP' implements proper design for a firewall, i.e.
any packets which are not explicitly permitted should not be
accepted.
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 9.8 | Attack Vector: NETWORK |
| Exploit Score: 3.9 | Attack Complexity: LOW |
| Impact Score: 5.9 | Privileges Required: NONE |
| Severity: CRITICAL | User Interaction: NONE |
| Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Scope: UNCHANGED |
| | Confidentiality: HIGH |
| | Integrity: HIGH |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:84008 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:72133 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:55673 |
