Fun-Reliable Side-Channels for Cross-Container Communication
Postedabout 2 months agoActiveabout 2 months ago
h4x0r.orgTechstory
calmmixed
Debate
20/100
Container SecuritySide-ChannelsCross-Container Communication
Key topics
Container Security
Side-Channels
Cross-Container Communication
The post discusses a proof-of-concept for cross-container communication using side-channels, and the discussion revolves around the implications and potential uses of this technique.
Snapshot generated from the HN discussion
Discussion Activity
Light discussionFirst comment
3h
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3
3-4h
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1.5
Key moments
- 01Story posted
Nov 12, 2025 at 8:52 AM EST
about 2 months ago
Step 01 - 02First comment
Nov 12, 2025 at 11:45 AM EST
3h after posting
Step 02 - 03Peak activity
3 comments in 3-4h
Hottest window of the conversation
Step 03 - 04Latest activity
Nov 12, 2025 at 10:19 PM EST
about 2 months ago
Step 04
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Analyzing up to 500 comments to identify key contributors and discussion patterns
ID: 45900185Type: storyLast synced: 11/20/2025, 1:35:57 PM
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was hoping to find at least one “cmon this is easy to avoid with X thing in the kernel/OS” info nugget dropped
The article does mention wanting to coordinate across multiple identical processes running on the same node in a wide variety of environments as the motivator.
So maybe it should be a feature, not a bug :)
I want my containers to be able to run work without other containers spying on them (already hard thanks to timing attacks).
This IPC channel only works if both containers are collaborating together. I don't think you can use it to spy on my container if my container isn't actively participating.