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CCE
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CCE-92060-3

Platform: cpe:/o:amazon:linux:2,cpe:/o:amazon:linuxDate: (C)2018-10-29   (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 : 9.8Attack Vector: NETWORK
Exploit Score: 3.9Attack Complexity: LOW
Impact Score: 5.9Privileges Required: NONE
Severity: CRITICALUser Interaction: NONE
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScope: UNCHANGED
 Confidentiality: HIGH
 Integrity: HIGH
 Availability: HIGH
  

References:
Resource IdReference
SCAP Repo OVAL Definitionoval:org.secpod.oval:def:49001
SCAP Repo OVAL Definitionoval:org.secpod.oval:def:48247


OVAL    2
oval:org.secpod.oval:def:49001
oval:org.secpod.oval:def:48247
XCCDF    2
xccdf_org.secpod_benchmark_general_Amazon_Linux_AMI
xccdf_org.secpod_benchmark_general_Amazon_Linux_2

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