Background: Linux pam originated from the open source implementation of the software DCE-RFC of Sun, a well-known manufacturer later acquired by Oracle. PAM is called Pluggable Authentication Modules, which can be inserted into authentication modules. Various authentication modules and plug-ins can be dynamically introduced for authentication without reloading the system, very flexible. Vulnerability details: When…

Background: In November 2020, lots of DeFi platforms in Ethereum encounters a security incident, such as Pickle Finance, 88mph. What Is Decentralized Finance (DeFi)?By deploying immutable smart contracts on Ethereum, DeFi developers can launch financial protocols and platforms that run exactly as programmed and that are available to anyone with an Internet connection. What Are…