Fix c0074

[kooomix]

User description

Overview

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Type

bug_fix, enhancement

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Description

• Enhanced detection and alerting for Docker socket mounts across various Kubernetes objects.
• Improved remediation paths in alerts to include specific container volume mounts.
• Added handling for privileged containers to prevent privilege escalation.
• Updated test cases to reflect new alert formats and remediation paths.

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Changes walkthrough

	Relevant files
Enhancement	2 files raw.rego Enhance Docker Socket Mount Detection and Alerting              rules/containers-mounting-docker-socket/raw.rego Enhanced volume mount path identification for Docker socket mounting alerts. Added container volume mount paths to alert messages for more precise remediation. +22/-9    raw.rego Enhance Privilege Escalation Prevention and Handle Privileged Containers rules/rule-allow-privilege-escalation/raw.rego Added checks and fixes for preventing privileged container creation. Enhanced the rule to include fixes for both privilege escalation and privileged container issues. +11/-6
Tests	11 files expected.json Update Test Output for CronJob Containerd                                rules/containers-mounting-docker-socket/test/cronjob-containerd/expected.json Updated expected test output to include container volume mount paths. +5/-2      expected.json Update Test Output for CronJob Crio                                            rules/containers-mounting-docker-socket/test/cronjob-crio/expected.json Updated expected test output to reflect new alert paths. +4/-2      expected.json Update Test Output for Generic CronJob                                      rules/containers-mounting-docker-socket/test/cronjob/expected.json Adjusted expected.json to match new alert format with volume mount paths. +5/-2      expected.json Update Test Output for Pod Containerd                                        rules/containers-mounting-docker-socket/test/pod-containerd/expected.json Updated test expectations for pod-containerd with new path format. +4/-2      expected.json Update Test Output for Pod Crio                                                    rules/containers-mounting-docker-socket/test/pod-crio/expected.json Modified expected test results to include new alert path details. +4/-2      expected.json Update Test Output for Generic Pod                                              rules/containers-mounting-docker-socket/test/pod/expected.json Updated test output to align with enhanced Docker socket mount detection. +4/-2      expected.json Update Test Output for Workloads Containerd                            rules/containers-mounting-docker-socket/test/workloads-containerd/expected.json Adjusted expected test output for workloads-containerd. +2/-2      expected.json Update Test Output for Workloads Crio                                        rules/containers-mounting-docker-socket/test/workloads-crio/expected.json Updated test expectations for workloads-crio. +2/-2      expected.json Update Test Output for Generic Workloads                                  rules/containers-mounting-docker-socket/test/workloads/expected.json Updated expected.json for workloads to reflect new alert format. +2/-2      expected.json Update Test Output for CronJob with Privilege Escalation Checks rules/rule-allow-privilege-escalation/test/cronjob/expected.json Updated test output to include fixes for privileged containers. +13/-2    expected.json Update Test Output for Workloads with Enhanced Security Checks rules/rule-allow-privilege-escalation/test/workloads/expected.json Updated expected test results to include privileged container fixes. +6/-1

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PR Description updated to latest commit (f5e71ba)

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Summary:

• License scan: failure
• Credentials scan: failure
• Vulnerabilities scan: failure
• Unit test: success
• Go linting: success

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PR Review

⏱️ Estimated effort to review [1-5]	2, because the changes are focused on specific functionality enhancements and bug fixes related to Docker socket mounts and privilege escalation handling. The modifications are well-contained within specific files, making it easier to review. However, understanding the context and implications of these changes requires familiarity with Kubernetes security practices.
🧪 Relevant tests	Yes
🔍 Possible issues	Possible Bug: The implementation of volume_mounts function assumes that there will always be a match for the volume name in the volumeMounts array. If a volume is defined but not mounted in any container, this could lead to an index out of bounds error or an empty path being returned, which might not be the intended behavior.
	Performance Concern: The approach of iterating over all volumes and containers for each workload type (Pod, CronJob, etc.) and then performing string formatting and array concatenation operations within these loops could have performance implications for workloads with a large number of volumes or containers.
🔒 Security concerns	No

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PR Code Suggestions

Category	Suggestions
Maintainability	Improve variable naming for clarity. It's recommended to use a more descriptive variable name than pathMounts to improve code readability. For example, volumeMountPaths would make it clearer that this variable holds paths related to volume mounts. rules/containers-mounting-docker-socket/raw.rego [12] -pathMounts = volume_mounts(volume.name, volumeMounts, sprintf("spec.containers[%v]", [j])) +volumeMountPaths = volume_mounts(volume.name, volumeMounts, sprintf("spec.containers[%v]", [j]))
	Combine fixPath entries for clarity and reduce redundancy. Instead of creating separate fixPath entries for allowPrivilegeEscalation and privileged, consider combining them into a single entry with a clear comment. This approach can improve the readability and maintainability of the policy by reducing redundancy. rules/rule-allow-privilege-escalation/raw.rego [84-85] +# Setting both allowPrivilegeEscalation and privileged to false for security fixPath = [{"path": sprintf("%vcontainers[%v].securityContext.allowPrivilegeEscalation", [start_of_path, format_int(i, 10)]), "value":"false"}, {"path": sprintf("%vcontainers[%v].securityContext.privileged", [start_of_path, format_int(i, 10)]), "value":"false"} ]
	Encapsulate repeated array concatenation in a utility function. The array.concat([path], pathMounts) operation is used multiple times with the same pattern. Consider creating a utility function, e.g., concat_paths, to encapsulate this behavior. This will make the code more DRY (Don't Repeat Yourself) and easier to maintain. rules/containers-mounting-docker-socket/raw.rego [13] -finalPath := array.concat([path], pathMounts) +concat_paths(path, pathMounts) = result { + result := array.concat([path], pathMounts) +} +finalPath := concat_paths(path, pathMounts)
	Merge similar functions into one with an additional parameter for path type. The get_failed_path and get_fixed_path functions are defined with a similar structure and purpose. To improve code maintainability and avoid duplication, consider merging them into a single function, e.g., get_path, that takes an additional parameter to specify whether to retrieve failed or fixed paths. rules/rule-allow-privilege-escalation/raw.rego [122-129] -get_failed_path(paths) = paths[0] { - paths[0] != "" -} else = [] -get_fixed_path(paths) = paths[1] { - paths[1] != "" +get_path(paths, type) = result { + index := {"failed": 0, "fixed": 1}[type] + result := paths[index] + result != "" } else = []
Best practice	Ensure consistent return type for the function. To ensure the volume_mounts function always returns a consistent type, it's better to return an empty array [] instead of an empty list else = []. This change will make the function's return type consistent, avoiding potential errors or confusion when manipulating the result. rules/containers-mounting-docker-socket/raw.rego [80] -} else = [] +} else = array.concat([], [])

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