@munin so apparently most unmanaged switches have a 8051 connected to the switch fabric inside.
would it occur to you that pretty much any switch on your network could be monitoring or injecting traffic? sure would not to me
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Ultra-cheap managed switches use this to run a webui. I have one at home. I also have an unmanaged one where I patched the firmware to enable magic control packets on one port that can be used to configure VLANs, etc. It's all pretty common.
The CPU is hideously underpowered though, so I doubt it can be used for too many nefarious purposes without causing issues. You can't, like, inspect all traffic or something.
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i think it's mostly useful for persistence
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less "monitor all traffic" and more "listen for magic sequence and run this exploit then" or something like it. ambient persistence
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