Since joining CertiK as a Security Engineer, my articles(write-ups, vulnerability analysis, etc) are now posted on CertiK’s website and medium. I also regularly attend conferences and meetups, where I present talks and share insights from my research and expertise. Talks Guest lectures on Web3 security for COMS 6998: Engineering Blockchain and Web3 Apps at Columbia […]
Note: This write-up doesn’t explain all the steps. Feel free to email me at peipei123gt@gmail.com if you’re not sure how I got X. #BabyCSP: 1. Bad CSP rule: 2. Submit a post with the payload and report to admin: […]
CVE Detail(Link): The safe-eval module describes itself as a safer version of eval. By accessing the object constructors, un-sanitized user input can access the entire standard library and effectively break out of the sandbox. Background: On Mar 3, 2017, Github user “odino” opened a security issue in the safeEval GitHub repository and provide a one-line […]
The detail about Apache Struts S2-057 Vulnerability: https://nvd.nist.gov/vuln/detail/CVE-2018-11776 Ubuntu: 1. Setup the environment 1.1 System version: ubuntu 14.04. 1.2 Install apache tomcat: sudo apt-get install tomcat7 sudo apt-get install tomcat7-docs tomcat7-admin tomcat7-examples sudo apt-get install default-jdk 1.3 Download the vulnerable Apache struts from: https://archive.apache.org/dist/struts/2.3.34/ 1.4 Extra files from the Zip […]
I went to Tampa, Florida last weekend to participate Raymond James CTF. My team got 3rd place with $2500 award. The weather in Florida is so0O gO0od: 24 degrees C, meanwhile it’s like 3 degrees C in Baltimore. The team photo: My eyes were closed lol. The trophy: The coin from gam3z: The onsite-CTF was 70% […]
picoCTF is a CTF hosted by CMU targeted at high school students, which is a great opportunity for beginner to improve their skill. I enjoy this CTF a lot.Not really a Team, just me. This is the Writeup for Flaskcards serial: “Flaskcards”, “Flaskcards Skeleton Key” and “Flaskcards and Freedom”. All three problems have the same interface: first […]