Adam Moussa
77302a1ebb
Authored FILES (not applied to AWS — provisioning gated behind the mandatory
GPT-4.1 IAM cross-review + Adam, design §7 B3) for the aws-posture checker's
read-only AWS identity. Decision D5: box stays read-only, auths via IAM Roles
Anywhere short-lived leaf certs from a new internal step-ca; NO long-lived AWS key.
- aws-posture-readonly-policy.json least-privilege read-only (ce:Get*,
cloudwatch:GetMetric*/DescribeAlarms, ec2/elb/rds:Describe*, lambda list +
GetFunctionConfiguration, s3:ListAllMyBuckets/GetBucketLocation). No write,
no iam:* mutation, no s3:GetObject/secrets/kms/logs data reads, no wildcard
actions. Resource:* only where AWS has no resource-level support.
- aws-posture-readonly-policy.rationale.md per-statement least-privilege rationale.
- aws-posture-trust-policy.json pins Roles Anywhere principal + leaf subject CN +
issuer CN + trust-anchor SourceArn (three conditions, all required).
- roles-anywhere-config.json trust anchor (pins step-ca root) + profile (1h session).
- step-ca-config-sketch.md internal CA config + systemd-timer leaf auto-renewal.
- CROSS-REVIEW-PACKET.md end-to-end trust model, blast radius, EXERCISED rollback,
reviewer scrutiny list.
Does NOT build aws-posture.sh, touch checker_coordinator.sh, or requirements.txt.
25 lines
1.7 KiB
Markdown
25 lines
1.7 KiB
Markdown
# security-review/iam/ — Phase-3 IAM artifacts (authored for cross-review, NOT applied)
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These are the IAM / Roles Anywhere / step-ca artifacts for the R720 agent-team **aws-posture**
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checker (design `docs/r720-agent-team-design.md` D5 / §4 / §6.3 / §7 Phase 3).
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**Nothing here is applied to AWS.** They are FILES for the mandatory GPT-4.1 IAM cross-review.
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aws-posture (the checker that *uses* this role) is **hard-gated behind that review** and is NOT
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built yet. Provisioning happens only after the review is recorded (design §7, B3) — and a VM
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snapshot is taken first per `feedback_ec2_replacement_snapshot`.
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Decision (D5): the box stays **read-only** and authenticates to AWS via **Roles Anywhere**
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short-lived leaf certs issued by a new internal **step-ca** — **no long-lived AWS key on the
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box**.
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| File | Purpose |
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| `CROSS-REVIEW-PACKET.md` | **Start here.** End-to-end trust model, least-privilege rationale, blast radius, exercised rollback, and the specific items for the reviewer. |
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| `aws-posture-readonly-policy.json` | Least-privilege read-only permission policy (valid, applyable IAM JSON). |
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| `aws-posture-readonly-policy.rationale.md` | Statement-by-statement rationale (IAM JSON can't carry comments). |
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| `aws-posture-trust-policy.json` | Role trust policy — pins Roles Anywhere + the leaf subject/issuer CN + trust-anchor ARN. |
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| `roles-anywhere-config.json` | Trust-anchor (pins step-ca root) + profile (1h session) config. |
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| `step-ca-config-sketch.md` | Internal CA config + systemd-timer auto-renewal of the short-lived leaf. |
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Per global instructions this IAM change also requires the GPT-4.1 cross-family review via
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`orchestrator/run.py`; this directory is that review's input.
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