Container base images (like Official Docker Hub images) are often updated without new tag versions. I call this Silent Rebuilds. There's no way to know this happens without image digest-checking automation like Dependabot and Renovate with specific settings. Failure to keep up-to-date is a prime source of vulnerabilities that can lead to serious security breaches. Automate the updates!

Check out the video podcast version here: https://youtu.be/z_ahbsSc4Fo

😇 My new GitHub Security workshop has launched! A free 2-hour workshop with hands-on labs to harden your repos and your workflows from common supply chain attacks. I'll cover how attackers are getting in, and then we'll lock down a sample repo so you know what needs to be done to protect your code. You'll leave with a deep understanding of risks and mitigations as well as a list of helpful tools to keep your repos safe, including my new "gasa" tool for scanning your repos and orgs.

★Show Links★

• Course waitlist: GitHub Actions Pro
• https://www.bretfisher.com/blog/silent-rebuilds
• https://github.com/BretFisher/silent-rebuilds
• https://www.bretfisher.com/chainguard-event

Creators & Guests

• Cristi Cotovan - Editor
• Bret Fisher - Host
• Beth Fisher - Producer
• Nirmal Mehta - Host

You can also support this podcast by subscribing to my YouTube channel and my monthly newsletter at bret.news!

Grab the best coupons for my GitHub, Agents, Docker, and Kubernetes courses.
Join my cloud native DevOps community on Discord.
Grab some merch at Bret's Loot Box
Homepage bretfisher.com

• (00:00) - Intro
• (05:30) - Docker Security and Image Builds
• (07:56) - CVEs in Containers
• (09:22) - Where we were
• (13:09) - Silent Builds and Mutable Tags
• (16:27) - Docker Official Image Tags Are Rebuilt Often
• (18:57) - Chainguard's Tool
• (19:17) - Tag Tracker Tool Overview
• (23:56) - High Fivers DevOps Group
• (25:59) - Problem of Silent Rebuilds
• (34:16) - Post-Stream Updates