Collaborate Disseminate
For an embedded IoT product running linux, digital signature validation of new firmware package is performed by a startup script file. For maintenance and troubleshooting purposes, the product does support a user account. As in the case of… Continue reading Obfuscation of scripts
Certain manufacturers seriously dislike open-source firmware for their devices, and this particular hack deals with quite extreme anti-hobbyist measures. The Meraki MR33, made by Cisco, is a nice access point …read more Continue reading Flashing Booby-Trapped Cisco AP With OpenWRT, The Hard Way
I’ve got a pretty tricky flag that I have been beating my head against for a while now and would love an explanation for how something like this would be possible. I have a program that when run, seemingly immediately cancels itself. File … Continue reading Buffer overflow on a program that only accepts arguments as input
Ever wonder what makes a cellphone’s operating system secure, or what that app you just installed is saying about you behind your back? In a brand new video series, [Jiska] …read more Continue reading “Reversing Shorts” Demystify Phone Security
The microprocessor feature which probably most enables the computing experience we take for granted today is protected mode. A chip with the required hardware can run individual software processes in …read more Continue reading Protected Mode On A Z80! (Almost)
We all know that it’s sometimes better to beg forgiveness than ask permission to do something, and we’ll venture a guess that more than a few of us have taken …read more Continue reading When [Elon] Says No, Just Reverse Engineer the Starlink Signal
It’s a fact of life that electronic devices become obsolete after a few years. Sometimes this is because technology has moved on, but it can also happen that a perfectly …read more Continue reading Decompiling Software to Fix an Old Solar Inverter
NFC hacking can be a daunting task with many specialized tools, a proliferation of protocols, and a multitude of different devices. [ElectronicCats] has done a lot of work to try …read more Continue reading Hunt Down NFC Signals With This NFC Multi Tool
Repairing electronic devices isn’t as hard as it used to be. Thanks to the internet, it’s easy to find datasheets and application notes for any standard component inside your gadget, …read more Continue reading Reverse-Engineering a Display Protocol to Repair a Roland Synthesizer
I have a device and I am trying to port scan it. I did the basic
nmap -A -p0- 192.168.0.x
but I am just getting
0/tcp filtered unknown
so I don’t think it is working. The device works on p2p so I am thinking that is why it may not be worki… Continue reading How can I port scan my p2p device?