Q: A developer accidentally commits an AWS Secret Access Key directly into a public GitHub repository. What steps must you immediately orchestrate?
Committing a key to a public repo means bots have already scraped it within seconds.
#General DevOps #General DevOps — Scenario-Based Interview Questions #L2 #DevOps #SRE #Architecture
🎙️ Candidate Opening & Architectural Context
""We faced this organizational and technical challenge while scaling our engineering teams. The interviewer is testing: Security incident response, credential compromise, git history vs git deletion.. I structure my answer around systematic triage first, root cause analysis second, and permanent remediation third.""
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🛠️ Production Runbook & Step-by-Step Resolution
1️⃣
Initial Diagnostics & Root Cause Analysis
Committing a key to a public repo means bots have already scraped it within seconds.
- Invalidate Everything: The absolute first step is *not* modifying git; it is going straight to AWS IAM and aggressively rotating/deleting that specific Access Key so it immediately becomes inert.
- Audit Breach: Check CloudTrail logs for that specific IAM user over the last few hours to confirm if the key was actually exploited (e.g., to spin up crypto miners) and assess the scope of the blast radius.
- Clean History (Optional but recommended): Do not just do a
git revert, because the secret remains in the commit history. You must use tools likegit filter-repoor BFG Repo-Cleaner to permanently scrub the secret from the entire commit history, securely regenerate the repository, and force push.
2️⃣
Remediation & Permanent Safeguards
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Invalidate Everything: The absolute first step is *not* modifying git; it is going straight to AWS IAM and aggressively rotating/d."
⚡ 60-Second Elevator Pitch Talking Points
- Invalidate Everything: The absolute first step is *not* modifying git; it is going straight to AW...
- Audit Breach: Check CloudTrail logs for that specific IAM user over the last few hours to confirm...
- Clean History (Optional but recommended): Do not just do a git revert, because the secret remains...
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