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- DEF CON 30. Whoamp;#39;s having a good time? - [Attendees] Yeah. (attendees clapping hands) - Whoa. You guys. Awesome. Awesome. Thatamp;#39;s great. So, this is Rex and Junyuan. So, letamp;#39;s give a big DEF CON 30 welcome. Come one. (attendees clapping hands) Yeah. (attendees clapping hands) - Okay. Thank you, everyone, for coming to our talk about a bypassing system called Tracing. My name is Rex Guo. And this is my co-speaker, Junyuan Zeng. So, we have a lot to cover in this talk. So, I will just jump over this slide, you can look up us online. Okay, so imagine a sophisticated attacker compromised your Linux production environment. He launches a Log4Shell exploit and then a file reverse shell back to his machine. Then he discovered that machine is running a vulnerable version of sudo, so he elevated privilege on the box. And then he read the /etc/shadow file to see if thereamp;#39;s any interesting hashes or cracks. He also discovered that he can do ssh hijacking to move int
