cis-gcp-cos-1.5.1.6

DevOps & Security

Ensure permissions on /etc/issue.net are configured

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Cloud_Providers/Google_Cloud_Platform/CIS_Google_Container-Optimized_OS_Benchmark_v1.2.0/cis-gcp-cos-1.5.1.6/SKILL.md

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1.5.1.6 Ensure permissions on /etc/issue.net are configured (Automated)

Description

The contents of the /etc/issue.net file are displayed to users prior to login for remote connections from configured services.

Rationale

If the /etc/issue.net file does not have the correct ownership it could be modified by unauthorized users with incorrect or misleading information.

Audit Procedure

Run the following command and verify Uid and Gid are both 0/root and Access is 644:

# stat /etc/issue.net
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)

Expected Result

The output should show Access: (0644/-rw-r--r--), Uid: ( 0/ root), and Gid: ( 0/ root).

Remediation

Run the following commands to set permissions on /etc/issue.net:

# chown root:root /etc/issue.net
# chmod 644 /etc/issue.net

/etc is stateless on Container-Optimized OS. Therefore, the steps mentioned above needs to be performed after every boot.

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists	x	x	x
v7	5.1 Establish Secure Configurations	x	x	x

Profile

Level 2 - Server | Automated