#1 Trusted Cybersecurity News Platform Followed by 4.50+ million
The Hacker News Logo
Subscribe – Get Latest News
Insider Risk Management

Secure Boot | Breaking Cybersecurity News | The Hacker News

Critical Boot Loader Vulnerability in Shim Impacts Nearly All Linux Distros

Critical Boot Loader Vulnerability in Shim Impacts Nearly All Linux Distros

Feb 07, 2024 Device Security / Vulnerability
The maintainers of shim have released  version 15.8  to address six security flaws, including a critical bug that could pave the way for remote code execution under specific circumstances. Tracked as  CVE-2023-40547  (CVSS score: 9.8), the vulnerability could be exploited to achieve a Secure Boot bypass. Bill Demirkapi of the Microsoft Security Response Center (MSRC) has been  credited  with discovering and reporting the bug. Major Linux distributions that use shim such as Debian , Red Hat , SUSE , and Ubuntu have all released advisories for the security flaw. "The shim's http boot support (httpboot.c) trusts attacker-controlled values when parsing an HTTP response, leading to a completely controlled out-of-bounds write primitive," Oracle's Alan Coopersmith  noted  in a message shared on the Open Source Security mailing list oss-security. Demirkapi, in a  post  shared on X (formerly Twitter) late last month, said the vulnerability "exists in every Linux bo
LogoFAIL: UEFI Vulnerabilities Expose Devices to Stealth Malware Attacks

LogoFAIL: UEFI Vulnerabilities Expose Devices to Stealth Malware Attacks

Dec 04, 2023 Technology / Firmware Security
The Unified Extensible Firmware Interface ( UEFI ) code from various independent firmware/BIOS vendors (IBVs) has been found vulnerable to potential attacks through high-impact flaws in image parsing libraries embedded into the firmware. The shortcomings, collectively labeled  LogoFAIL  by Binarly, "can be used by threat actors to deliver a malicious payload and bypass Secure Boot, Intel Boot Guard, and other security technologies by design." Furthermore, they can be weaponized to bypass security solutions and deliver persistent malware to compromised systems during the boot phase by injecting a malicious logo image file into the  EFI system partition . While the issues are not silicon-specific, meaning they impact both x86 and ARM-based devices, they are also UEFI and IBV-specific. The vulnerabilities comprise a heap-based buffer overflow flaw and an out-of-bounds read, details of which are expected to be made public later this week at the  Black Hat Europe conference .
New Flaw in Acer Laptops Could Let Attackers Disable Secure Boot Protection

New Flaw in Acer Laptops Could Let Attackers Disable Secure Boot Protection

Nov 29, 2022
Acer has released a firmware update to address a security vulnerability that could be potentially weaponized to turn off UEFI Secure Boot on affected machines. Tracked as  CVE-2022-4020 , the high-severity vulnerability affects five different models that consist of Aspire A315-22, A115-21, and A315-22G, and Extensa EX215-21 and EX215-21G. The PC maker described the vulnerability as an issue that "may allow changes to Secure Boot settings by creating NVRAM variables." Credited with  discovering  the flaw is ESET researcher Martin Smolár, who previously disclosed  similar bugs  in Lenovo computers. Disabling Secure Boot, an integrity mechanism that guarantees that only trusted software is loaded during system startup, enables a malicious actor to tamper with  boot loaders , leading to severe consequences. This includes  granting  the attacker complete control over the operating system loading process as well as "disable or bypass protections to silently deploy their
cyber security

Demonstrate Responsible AI: Get the ISO 42001 Compliance Checklist from Vanta

websiteVantaCompliance / Security Audit
ISO 42001 helps organizations demonstrate trustworthy AI practices in accordance with global standards. With Vanta, completing the requirements for ISO 42001 compliance can be done in a fraction of the time. Download the checklist to get started.
It's Time to Master the Lift & Shift: Migrating from VMware vSphere to Microsoft Azure

It's Time to Master the Lift & Shift: Migrating from VMware vSphere to Microsoft Azure

May 15, 2024Enterprise Security / Cloud Computing
While cloud adoption has been top of mind for many IT professionals for nearly a decade, it's only in recent months, with industry changes and announcements from key players, that many recognize the time to make the move is now. It may feel like a daunting task, but tools exist to help you move your virtual machines (VMs) to a public cloud provider – like Microsoft Azure – with relative ease. Transitioning from VMware vSphere to Microsoft Azure requires careful planning and execution to ensure a smooth migration process. In this guide, we'll walk through the steps involved in moving your virtualized infrastructure to the cloud giant, Microsoft Azure. Whether you're migrating your entire data center or specific workloads, these steps will help you navigate the transition effectively. 1. Assess Your Environment: Before diving into the migration process, assess your current VMware vSphere environment thoroughly. Identify all virtual machines (VMs), dependencies, and resource
New UEFI Firmware Flaws Reported in Several Lenovo Notebook Models

New UEFI Firmware Flaws Reported in Several Lenovo Notebook Models

Nov 10, 2022
PC maker Lenovo has addressed yet another set of three shortcomings in the Unified Extensible Firmware Interface (UEFI) firmware affecting several Yoga, IdeaPad, and ThinkBook devices. "The vulnerabilities allow disabling UEFI Secure Boot or restoring factory default Secure Boot databases (incl. dbx): all simply from an OS," Slovak cybersecurity firm ESET  explained  in a series of tweets. UEFI refers to software that acts as an interface between the operating system and the firmware embedded in the device's hardware. Because UEFI is  responsible  for launching the operating system when a device is powered on, it has made the technology an attractive option for threat actors looking to  drop malware  that's difficult to detect and remove. Viewed in that light, the flaws, tracked as CVE-2022-3430, CVE-2022-3431, and CVE-2022-3432, could be abused by an adversary to turn off Secure Boot, a security mechanism that's designed to prevent malicious programs from lo
Researchers Uncover UEFI Secure Boot Bypass in 3 Microsoft Signed Boot Loaders

Researchers Uncover UEFI Secure Boot Bypass in 3 Microsoft Signed Boot Loaders

Aug 12, 2022
A security feature bypass vulnerability has been uncovered in three signed third-party Unified Extensible Firmware Interface ( UEFI ) boot loaders that allow bypass of the UEFI Secure Boot feature. "These vulnerabilities can be exploited by mounting the EFI System Partition and replacing the existing bootloader with the vulnerable one, or modifying a UEFI variable to load the vulnerable loader instead of the existing one," hardware security firm Eclypsium  said  in a report shared with The Hacker News. The following  vendor-specific boot loaders , which were signed and authenticated by Microsoft, have been found vulnerable to the bypass and have been patched as part of the tech giant's  Patch Tuesday update  released this week - Eurosoft Boot Loader ( CVE-2022-34301 ) New Horizon Data Systems Inc Boot Loader ( CVE-2022-34302 ), and Crypto Pro Boot Loader ( CVE-20220-34303 ) Secure Boot is a  security standard  designed to thwart malicious programs from loading w
Critical GRUB2 Bootloader Bug Affects Billions of Linux and Windows Systems

Critical GRUB2 Bootloader Bug Affects Billions of Linux and Windows Systems

Jul 29, 2020
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
Flaw Affecting Millions of Cisco Devices Let Attackers Implant Persistent Backdoor

Flaw Affecting Millions of Cisco Devices Let Attackers Implant Persistent Backdoor

May 14, 2019
Researchers have discovered a severe vulnerability in Cisco products that could allow attackers to implant persistent backdoor on wide range devices used in enterprises and government networks, including routers, switches, and firewalls. Dubbed Thrangrycat or 😾😾😾, the vulnerability, discovered by researchers from the security firm Red Balloon and identified as CVE-2019-1649, affects multiple Cisco products that support Trust Anchor module (TAm). Trust Anchor module (TAm) is a hardware-based Secure Boot functionality implemented in almost all of Cisco enterprise devices since 2013 that ensures the firmware running on hardware platforms is authentic and unmodified. However, researchers found a series of hardware design flaws that could allow an authenticated attacker to make the persistent modification to the Trust Anchor module via FPGA bitstream modification and load the malicious bootloader. "An attacker with root privileges on the device can modify the contents of
Oops! Microsoft Accidentally Leaks Backdoor Keys to Bypass UEFI Secure Boot

Oops! Microsoft Accidentally Leaks Backdoor Keys to Bypass UEFI Secure Boot

Aug 10, 2016
It's True  —  There is no such backdoor that only its creator can access. Microsoft has accidentally leaked the Secret keys that allow hackers to unlock devices protected by UEFI ( Unified Extensible Firmware Interface ) Secure Boot feature. What's even worse? It will be impossible for Microsoft to undo its leak. Secure Boot is a security feature that protects your device from certain types of malware, such as a rootkit, which can hijack your system bootloader, as well as, Secure Boot restricts you from running any non-Microsoft operating system on your device. In other words, when Secure Boot is enabled, you will only be able to boot Microsoft approved ( cryptographically signature checking ) operating systems. However, the Golden Keys disclosed by two security researchers, using alias MY123 and Slipstream , can be used to install non-Windows operating systems, say GNU/Linux or Android, on the devices protected by Secure Boot. Moreover, according to the blog pos
FixMeStick's first to supports Windows 8 with Secure Boot ON

FixMeStick's first to supports Windows 8 with Secure Boot ON

Jun 12, 2013
Windows 8 PCs contain a new technology called Secure Boot that only boots devices that have been verified by Microsoft. Also Microsoft's own Offline Defender won't boot on Windows 8 PCs with Secure Boot on. Neither will Norton's Bootable Recovery Tool. We asked the guys at FixMeStick how their external hardware-based anti-malware device can boot on brand new Windows 8 hardware with Secure boot on, as well as 10 year old PCs with 32 processors running XP. Here's their answer: 1. It got a Master Boot Record. : In other words, it boots on BIOS-based PCs, essentially all PCs prior to Windows 8. 2. and it got UEFI boot partition : It also got a UEFI boot partition, so it will boot on PCs with the latest UEFI firmware too. 3. It's 32 bit : There's a 32 bit operating system on the stick so it will work with 32 bit microprocessors. Most rescue ISOs\disks are 32 bit only, so by default they work on 32 bit processors and 64 bit processors. 4. and it's 64
Cybersecurity
Expert Insights
Cybersecurity Resources