TMA-COS-1.5.1.3
Ensure remote login warning banner is configured properly
Description
The contents of the /etc/issue.net file are displayed to users prior to login for remote connections from configured services. Unix-based systems have typically displayed information about the OS release and patch level upon logging in to the system. This information can be useful to developers who are developing software for a particular OS platform. If mingetty(8) supports the following options, they display operating system information: \m - machine architecture \r - operating system release \s - operating system name \v - operating system version Warning messages inform users who are attempting to login to the system of their legal status regarding the system and must include the name of the organization that owns the system and any monitoring policies that are in place. Displaying OS and patch level information in login banners also has the side effect of providing detailed syste...
How it is checked
Audit method: Shell command
os=$(grep "^ID=" /etc/os-release | cut -d= -f2 | tr -d '"'); [ -s /etc/issue.net ] && ! grep -Eiq "(\\v|\\r|\\m|\\s|$os)" /etc/issue.net && echo compliant || echo noncompliant- Expected output
compliant
How it is fixed
Fix method: Guidance or infrastructure patch
Edit the /etc/issue.net file with the appropriate contents according to your site policy, remove any instances of \m , \r , \s , \v or references to the OS platform # echo "Authorized uses only. All activity may be monitored and reported." > /etc/issue.net /etc is stateless on Container-Optimized OS. Therefore, the steps mentioned above needs to be performed after every boot.
Properties
- Operating systems
- Any
- Tags
- container-optimized-oscoslogging
- Reference
- CIS Google Container-Optimized OS Benchmark v1.2.0 - 1.5.1.3 Ensure remote login warning banner is configured properly
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target cos