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Redis doesn't accept unauthenticated external connections by default for a while now, specifically to try and eliminate this footgun.

https://github.com/redis/redis/commit/edd4d555df57dc84265fdf...

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I had an issue where I used the redis docker image and didn't understand docker networking properly so I set the network mode as host so my other container could connect. Not knowing this had exposed redis to the world unauthenticated (in about 2018).

Eventually a kind script set a password on redis which caused me to notice and fix this issue.

Interesting, this definitely happened with a more recent version... Wonder if theres some other exploit at play too (could also be the containerized version?)

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