Newsletter 27/11/2022
This machine contains a web application built with Spring Boot that is vulnerable to Server-Side Template Injection with a particular format. After that, in order to escalate privileges, we must analyze a Java program, enter some malicious metadata in a JPEG image, add an XML External Entity into a controlled XML file, break a log parser logic and finally wait for root to process the XML file and read its private SSH key
sys_ptrace
. Patching
nginx. Directory listing
XML External Entity injection
64-bit binary. Buffer Overflow. ret2libc. Bypass PIE and ASLR