Preface: Virtual memory settings can often be controlled through the OS. In addition, RAM uses swapping techniques, while virtual memory uses paging. While physical memory is limited to the size of the RAM chip, virtual memory is limited by the size of the hard disk. Background: When you create a VM, a fixed amount of memory…

Preface: HTTP[.]sys is mature technology that protects against many types of attacks and provides the robustness, security, and scalability of a full-featured web server. IIS itself runs as an HTTP listener on top of HTTP[.]sys. Background: HTTP/1.1 specifies that a response sent as Transfer-Encoding: chunked can include optional trailers (ie. what would normally be sent…

Preface: For security reasons, SAP will not disclose the details of the vulnerability. Security bulletin issued yesterday. However, the end user only needs to tinker. But we don’t know what happened? So my purpose of this topic is to try to dig out details an interest that appeals to you. If , my findings didn’t…

Preface: Privilege escalation attacks can be separated into two way. It is horizontal privilege escalation and vertical privilege escalation. Privilege escalation happens when a malicious user exploits a bug, design flaw, or configuration error in an application or operating system to gain elevated access to resources that should normally be unavailable to them. Background: Starting…

Preface: Deploy the leading enterprise container runtime with just two commands Background: Mirantis Container Runtime is the industry-leading, high-level runtime at the heart of Mirantis Kubernetes Engine, enabling it to operate Swarm and Kubernetes containers efficiently on any substrate. It is based on containerd, the Cloud Native Computing Foundation (CNCF) core container runtime. FIPS 140-2…

Preface: What if , design weakness not directly effect the software component. Is it a vulnerability? Or, can we ignore? Background: What is the difference between DNS and nameservers?DNS records are what contain the actual information that other browsers or services need to interact with, like your server’s IP address. Nameservers, on the other hand,…

Preface: Citrix Hypervisor is based on the Xen Project hypervisor, with extra features and supports provided by Citrix. Citrix Hypervisor 8.2 uses version 4.13. 4 of the Xen hypervisor. Background: Netfront communicates with a counterpart backend driver called netback in the driver domain, using shared memory I/O channels. The driver domain uses a software bridge…

Preface: A Pod represents a single instance of a running process in your cluster. Pods contain one or more containers, such as Docker containers. When a Pod runs multiple containers, the containers are managed as a single entity and share the Pod’s resources. Background: Containerd was designed to be used by Docker and Kubernetes as…