GRUB bootloader | Breaking Cybersecurity News | The Hacker News

A team of cybersecurity researchers today disclosed details of a new high-risk vulnerability affecting billions of devices worldwide—including servers and workstations, laptops, desktops, and IoT systems running nearly any Linux distribution or Windows system. Dubbed ' BootHole ' and tracked as CVE-2020-10713 , the reported vulnerability resides in the GRUB2 bootloader, which, if exploited, could potentially let attackers bypass the Secure Boot feature and gain high-privileged persistent and stealthy access to the targeted systems. Secure Boot is a security feature of the Unified Extensible Firmware Interface (UEFI) that uses a bootloader to load critical components, peripherals, and the operating system while ensuring that only cryptographically signed code executes during the boot process. "One of the explicit design goals of Secure Boot is to prevent unauthorized code, even running with administrator privileges, from gaining additional privileges and pre-OS pers

So what would anyone need to bypass password protection on your computer? It just needs to hit the backspace key 28 times , for at least the computer running Linux operating system. Wait, what? A pair of security researchers from the University of Valencia have uncovered a bizarre bug in several distributions of Linux that could allow anyone to bypass any kind of authentication during boot-up just by pressing backspace key 28 times. This time, the issue is neither in a kernel nor in an operating system itself, but rather the vulnerability actually resides in Grub2 , the popular Grand Unified Bootloader , which is used by most Linux systems to boot the operating system when the PC starts. Also Read: GPU-based Linux Rootkit and Keylogger . The source of the vulnerability is nothing but an integer underflow fault that was introduced with single commit in Grub version 1.98 (December 2009) – b391bdb2f2c5ccf29da66cecdbfb7566656a704d – affecting the grub_password

For years, securing a company's systems was synonymous with securing its "perimeter." There was what was safe "inside" and the unsafe outside world. We built sturdy firewalls and deployed sophisticated detection systems, confident that keeping the barbarians outside the walls kept our data and systems safe. The problem is that we no longer operate within the confines of physical on-prem installations and controlled networks. Data and applications now reside in distributed cloud environments and data centers, accessed by users and devices connecting from anywhere on the planet. The walls have crumbled, and the perimeter has dissolved, opening the door to a new battlefield: identity . Identity is at the center of what the industry has praised as the new gold standard of enterprise security: "zero trust." In this paradigm, explicit trust becomes mandatory for any interactions between systems, and no implicit trust shall subsist. Every access request, regardless of its origin,