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https://github.com/projectdiscovery/nuclei-templates.git
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73 lines
2.5 KiB
YAML
73 lines
2.5 KiB
YAML
id: gcloud-pubsub-crossproject-access
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info:
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name: Pub/Sub Subscription Cross-Project Access
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author: princechaddha
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severity: high
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description: |
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Ensure that your Google Cloud Pub/Sub subscriptions are configured to allow access only to trusted GCP projects to protect against unauthorized cross-project access. The list with the trusted GCP projects must be defined in the conformity rule settings, in the Trend Cloud One™ – Conformity account console.
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impact: |
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Allowing access to Pub/Sub subscriptions from untrusted GCP projects can lead to unauthorized data access, privilege escalation, and potential data exfiltration.
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remediation: |
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Restrict access to Pub/Sub subscriptions by configuring IAM policies to include only trusted service accounts or users. Ensure roles such as "roles/pubsub.subscriber", "roles/pubsub.editor", or "roles/pubsub.admin" are only assigned to trusted principals.
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reference:
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- https://cloud.google.com/pubsub/docs/access-control
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- https://cloudone.trendmicro.com/docs/conformity
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tags: cloud,devops,gcp,gcloud,google-cloud-pubsub,gcp-cloud-config
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flow: |
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code(1)
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for(let projectId of iterate(template.projectIds)){
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set("projectId", projectId)
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code(2)
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for(let pubsubSubscription of iterate(template.subscriptions)){
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set("subscriptionName", pubsubSubscription)
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code(3)
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}
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}
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: |
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gcloud projects list --format="json(projectId)"
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extractors:
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- type: json
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name: projectIds
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internal: true
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json:
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- '.[].projectId'
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- engine:
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- sh
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- bash
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source: |
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gcloud pubsub subscriptions list --project $projectId --format="json(name)"
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extractors:
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- type: json
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name: subscriptions
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internal: true
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json:
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- '.[].name'
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- engine:
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- sh
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- bash
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source: |
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gcloud pubsub subscriptions get-iam-policy $subscriptionName --format=json | jq '.bindings[]'
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matchers:
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- type: word
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words:
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- '@'
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extractors:
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- type: dsl
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dsl:
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- '"Pub/Sub subscription " + subscriptionName + " in project " + projectId + " has cross-project access configured with one or more untrusted members."'
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# digest: 4a0a00473045022100cf5daef669d70a8709759d4df7a2cf30496f9f83e0c47c4c04ff56351037ef40022057077361e1e73dd4aed5ca8f9a26a61abb15729f1b6b7df3394b5df852cdf74e:922c64590222798bb761d5b6d8e72950 |