Preface: Uninitialized data segment, often called the “bss” segment, named after an ancient assembler operator that stood for “block started by symbol.” Data in this segment is initialized by the kernel to arithmetic 0 before the program starts executing. Background: Xen is an open-source baremetal hypervisor that is widely used by commercial and non-commercial platforms…

Preface: Last September (2021) ICS adviced that the public should be concerned about the multiple vulnerabilities encountered by Modbus products. This product model is (TBox) from the supplier Ovarro.Such vulnerabilities were documented in a CVE article published until this week (July 28, 2022). The record number is CVE-2021-22642.Perhaps reader has confuse about this CVE record…

Preface: What is SKB in Linux kernel? SKBs are composed of a linear data buffer, and optionally a set of 1 or more page buffers. If there are page buffers, the total number of bytes in the page buffer area is ‘data_len’. Therefore the number of bytes in the linear buffer is ‘skb->len – skb->data_len’.…

Preface: According to technical report (OT:ICEFALL) by cyber security service provider (Forescout). They observe that an APT toolkit targeting several OT devices, such as OPC UA servers and PLCs from Omron and Schneider Electric. According to ICS-CERT advisories on 28th June, 2022. The article had written down the RISK EVALUATION.  Successful exploitation of these vulnerabilities…

Preface: As time goes by, online training course is the mainstream to offload traditional onsite training course. The Learning Management System (LMS) is a software application designed to deliver, track, report on and manage trainings and learner activity. Some popular LMS used by educational institutions include Moodle, Blackboard Learn and Schoology.Accroding to security reason, LMS…

Preface: GdkPixbuf is a library with a long history, and it has been incrementally modified over years, so it may retain some older coding practices alongside newer ones. Background: GdkPixbuf is a library that loads image data in various formats and stores it as linear buffers in memory. The buffers can then be scaled, composited,modified,…

Preface: jQuery is an independent JavaScript library which brings along added functions and additional functionality to the standard built-in objects to what JavaScript natively provides. The programming crowd with jQuery still looks strong. According to w3techs stats. Popular sites are still using jQuery. Background: jQuery is the core library. jQueryUI is built on top of…

Preface: Common JUNOS daemons include: The routing protocol daemon (rpd) handles all routing protocol messages and routing table updates and implements routing policies. rpd contains modules that each function independently while sharing information with the others. The device control daemon (dcd) manages all interface devices and configurations. This daemon sends configurations to the kernel to…

Preface: Oracle Database 19c is the current long term release, and it provides the highest level of release stability and longest time-frame for support and bug fixes. Oracle Database 21c, also available for production use today as an innovation release, provides an early insight into the many enhancements and new capabilities. Background: Use the CREATE…

Preface: A growing number of Chinese chip design firms have adopted open-source RISC-V in their chip designs as an alternative to Intel’s proprietary X86 and Arm’s architecture, in a bid to minimise potential damage from US sanctions and to save on licensing fees. Background: If you still remember? The RISC System/6000 (RS/6000) is a family…