Excessive Privileges - Docker

Description

The containers executed in the application do not properly restrict the privileges of the users, executing tasks with root user instead of a custom user.

Impact

Gain total control of the container.

Recommendation

• Restrict the privileges of the user that execute instructions inside the container.
• Avoid the use of the root user as default user.

Threat

Authenticated attacker with local access to the container.

Expected Remediation Time

⌚ 15 minutes.

Score

Default score using CVSS 3.1. It may change depending on the context of the src.

Base

• Attack vector: L
• Attack complexity: L
• Privileges required: L
• User interaction: N
• Scope: U
• Confidentiality: L
• Integrity: L
• Availability: L

Temporal

• Exploit code madurity: U
• Remediation level: O
• Report confidence: C

Result

• Vector string: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C
• Score:
  • Base: 5.3
  • Temporal: 4.6
• Severity:
  • Base: Medium
  • Temporal: Medium

Details

https://docs.docker.com/engine/reference/builder/#user

Requirements

• 095.Define users with privileges
• 096.Set user's required privileges
• 186.Use the principle of least privilege

Fixes

• Docker

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