4 ms·
Well, the docs for these things are online and there are hundreds of opcodes. Some are less benign than "inventory status". One hopes that any of the "S" opcode
by bchociej 12y ago
Well, the docs for these things are online and there are hundreds of opcodes. Some are less benign than "inventory status". One hopes that any of the "S" opcodes ("set" as opposed to "inquire" or "I" opcodes) are protected by the " System RS-232 Security Code", but I'm not about to try to find out.
- jschwartzi 12y agoOne would also hope that the System RS-232 Security Code is actually unique to each device and is not simply specified in a manual somewhere.
- jrochkind1 12y agoI'm guessing the "Systems RS-232 Security Code" is a 4-digit numeric PIN, or at any rate a fairly low-entropy password normally, and that there is absolutely no rate-limiting or monitoring or other guard against a live brute force attack. It looks like the documentation's been taken down from the URL included in the OP. I'm sure it's available elsewhere, but I haven't tried to find it.