Any node interface available on a public exposes confidential grid info #861
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Reference: tahoe-lafs/trac-2024-07-25#861
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Any node that is available on an exposed IP address publishes the introducer furl and the helper furl (if attached) to the world.
This results in anyone discovering the address of an exposed node being able to attach to a grid and a helper. This could result in unlimited abuse.
If one wanted to store files on their grid, then publish specific files to the net, a public node is required. Once that node is published, finding the furls is trivial.
Example: Zooko's blog hosted on the TestGrid:
http://testgrid.allmydata.org:3567/uri/URI:DIR2-RO:j74uhg25nwdpjpacl6rkat2yhm:kav7ijeft5h7r7rxdp5bgtlt3viv32yabqajkrdykozia5544jqa/wiki.html#2009-12-15
Going to the root of the node:
http://testgrid.allmydata.org:3567/
Introducer:
This happens to be a wonderful feature for the TestGrid, but a easy point of attack for anyone with a "closed" or "limited" grid.
Moved to #860