UEFI | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have disclosed details of a now-patched security flaw in Phoenix SecureCore UEFI firmware that affects multiple families of Intel Core desktop and mobile processors. Tracked as CVE-2024-0762 (CVSS score: 7.5), the "UEFIcanhazbufferoverflow" vulnerability has been described as a case of a buffer overflow stemming from the use of an unsafe variable in the Trusted Platform Module (TPM) configuration that could result in the execution of malicious code. "The vulnerability allows a local attacker to escalate privileges and gain code execution within the UEFI firmware during runtime," supply chain security firm Eclypsium said in a report shared with The Hacker News. "This type of low-level exploitation is typical of firmware backdoors (e.g., BlackLotus ) that are increasingly observed in the wild. Such implants give attackers ongoing persistence within a device and often, the ability to evade higher-level security measures running in

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 .

Shadow apps, a segment of Shadow IT, are SaaS applications purchased without the knowledge of the security team. While these applications may be legitimate, they operate within the blind spots of the corporate security team and expose the company to attackers.  Shadow apps may include instances of software that the company is already using. For example, a dev team may onboard their own instance of GitHub to keep their work separate from other developers. They might justify the purchase by noting that GitHub is an approved application, as it is already in use by other teams. However, since the new instance is used outside of the security team's view, it lacks governance. It may store sensitive corporate data and not have essential protections like MFA enabled, SSO enforced, or it could suffer from weak access controls. These misconfigurations can easily lead to risks like stolen source code and other issues. Types of Shadow Apps  Shadow apps can be categorized based on their interac

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

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

Commercially developed FinFisher surveillanceware has been upgraded to infect Windows devices using a  UEFI  (Unified Extensible Firmware Interface) bootkit that leverages a trojanized Windows Boot Manager, marking a shift in infection vectors that allow it to elude discovery and analysis. Detected in the wild since 2011, FinFisher (aka FinSpy or Wingbird) is a spyware toolset for Windows, macOS, and Linux developed by Anglo-German firm Gamma International and supplied exclusively to law enforcement and intelligence agencies. But like with NSO Group's Pegasus, the software has also been used to  spy on Bahraini activists  in the past allegedly and delivered as part of  spear-phishing campaigns  in September 2017. FinFisher is equipped to harvest user credentials, file listings, sensitive documents, record keystrokes, siphon email messages from Thunderbird, Outlook, Apple Mail, and Icedove, intercept Skype contacts, chats, calls and transferred files, and capture audio and video

Cybersecurity researchers on Thursday disclosed a chain of vulnerabilities affecting the BIOSConnect feature within Dell Client BIOS that could be abused by a privileged network adversary to gain arbitrary code execution at the BIOS/UEFI level of the affected device. "As the attacker has the ability to remotely execute code in the pre-boot environment, this can be used to subvert the operating system and undermine fundamental trust in the device," researchers from enterprise device security firm Eclypsium said . "The virtually unlimited control over a device that this attack can provide makes the fruit of the labor well worth it for the attacker." In all, the flaws affect 128 Dell models spanning across consumer and business laptops, desktops, and tablets, totalling an estimated 30 million individual devices. Worse, the weaknesses also impact computers that have  Secure Boot  enabled, a security feature designed to prevent  rootkits from being installed  at boot

TrickBot , one of the most notorious and adaptable malware botnets in the world, is expanding its toolset to set its sights on firmware vulnerabilities to potentially deploy bootkits and take complete control of an infected system. The new functionality, dubbed " TrickBoot " by Advanced Intelligence (AdvIntel) and Eclypsium, makes use of readily available tools to check devices for well-known vulnerabilities that can allow attackers to inject malicious code in the UEFI/BIOS firmware of a device, granting the attackers an effective mechanism of persistent malware storage. "This marks a significant step in the evolution of TrickBot as UEFI level implants are the deepest, most powerful, and stealthy form of bootkits," the researchers said. "By adding the ability to canvas victim devices for specific UEFI/BIOS firmware vulnerabilities, TrickBot actors are able to target specific victims with firmware-level persistence that survives re-imaging or even device br

Cybersecurity researchers have spotted a rare kind of potentially dangerous malware that targets a machine's booting process to drop persistent malware. The campaign involved the use of a compromised  UEFI  (or Unified Extensible Firmware Interface) containing a malicious implant, making it the  second known public case  where a UEFI rootkit has been used in the wild. According to  Kaspersky , the rogue UEFI firmware images were modified to incorporate several malicious modules, which were then used to drop malware on victim machines in a series of targeted cyberattacks directed against diplomats and members of an NGO from Africa, Asia, and Europe. Calling the malware framework " MosaicRegressor ," Kaspersky researchers Mark Lechtik, Igor Kuznetsov, and Yury Parshin said a telemetry analysis revealed several dozen victims between 2017 and 2019, all of whom had some ties to North Korea. UEFI is a firmware interface and a replacement for BIOS that improves security, e