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CIS Ubuntu 14.04 LTS - 1.6.1.4 Ensure no unconfined daemons exist

DevOps & Security
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Verify that no daemons are running unconfined outside of SELinux policy restrictions

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_Linux_14.04_LTS_Benchmark_v2.1.0/cis-ubuntu1404-v210-1-6-1-4/SKILL.md

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1.6.1.4 Ensure no unconfined daemons exist (Scored)

Profile Applicability

  • Level 2 - Server
  • Level 2 - Workstation

Description

Daemons that are not defined in SELinux policy will inherit the security context of their parent process.

Rationale

Since daemons are launched and descend from the init process, they will inherit the security context label initrc_t. This could cause the unintended consequence of giving the process more permission than it requires.

Audit Procedure

Run the following command and verify not output is produced:

ps -eZ | egrep "initrc" | egrep -vw "tr|ps|egrep|bash|awk" | tr ':' ' ' | awk '{ print $NF }'

Expected Result

No output should be returned. Any output indicates unconfined daemons that need investigation.

Remediation

Investigate any unconfined daemons found during the audit action. They may need to have an existing security context assigned to them or a policy built for them.

Default Value

Not applicable.

Notes

Occasionally certain daemons such as backup or centralized management software may require running unconfined. Any such software should be carefully analyzed and documented before such an exception is made.

References

  • CIS Controls: 14.4 Protect Information With Access Control Lists

Profile

  • Level 2 - Server
  • Level 2 - Workstation