Aug 09, 2025Ravie LakshmananVulnerability / {Hardware} Safety
Cybersecurity researchers have disclosed vulnerabilities in choose mannequin webcams from Lenovo that would flip them into BadUSB assault gadgets.
“This enables distant attackers to inject keystrokes covertly and launch assaults unbiased of the host working system,” Eclypsium researchers Paul Asadoorian, Mickey Shkatov, and Jesse Michael mentioned in a report shared with The Hacker Information.
The vulnerabilities have been codenamed BadCam by the firmware safety firm. The findings had been offered on the DEF CON 33 safety convention immediately.
The event probably marks the primary time it has been demonstrated that menace actors who achieve management of a Linux-based USB peripheral that is already hooked up to a pc might be weaponized for malicious intent.
In a hypothetical assault state of affairs, an adversary can reap the benefits of the vulnerability to ship a sufferer a backdoored webcam, or connect it to a pc if they’re able to safe bodily entry, and remotely subject instructions to compromise a pc with the intention to perform post-exploitation exercise.
BadUSB, first demonstrated over a decade in the past by safety researchers Karsten Nohl and Jakob Lell on the 2014 Black Hat convention, is an assault that exploits an inherent vulnerability in USB firmware, primarily reprogramming it to discreetly execute instructions or run malicious applications on the sufferer’s laptop.
“Not like conventional malware, which lives within the file system and may usually be detected by antivirus instruments, BadUSB lives within the firmware layer,” Ivanti notes in a proof of the menace printed late final month. “As soon as related to a pc, a BadUSB gadget can: Emulate a keyboard to sort malicious instructions, set up again doorways or keyloggers, redirect web site visitors, [and] exfiltrate delicate knowledge.”
Lately, Google-owned Mandiant and the U.S. Federal Bureau of Investigation (FBI) have warned that the financially motivated menace group tracked as FIN7 has resorted to mailing U.S.-based organizations “BadUSB” malicious USB gadgets to ship a malware referred to as DICELOADER.
The most recent discovery from Eclypsium reveals {that a} USB-based peripheral, akin to webcams working Linux, that was not initially meant to be malicious, could be a vector for a BadUSB assault, marking a big escalation. Particularly, it has been discovered that such gadgets might be remotely hijacked and reworked into BadUSB gadgets with out ever being bodily unplugged or changed.
“An attacker who positive factors distant code execution on a system can reflash the firmware of an hooked up Linux-powered webcam, repurposing it to behave as a malicious HID or to emulate extra USB gadgets,” the researchers defined.
“As soon as weaponized, the seemingly innocuous webcam can inject keystrokes, ship malicious payloads, or function a foothold for deeper persistence, all whereas sustaining the outward look and core performance of an ordinary digicam.”
Moreover, menace actors with the flexibility to change the firmware of the webcam can obtain a higher stage of persistence, permitting them to re-infect the sufferer laptop with malware even after it has been wiped and the working system is reinstalled.
The vulnerabilities uncovered in Lenovo 510 FHD and Lenovo Efficiency FHD webcams relate to how the gadgets don’t validate firmware, because of which they’re prone to a whole compromise of the digicam software program by way of BadUSB-style assaults, provided that they run Linux with USB Gadget assist.
Following accountable disclosure with Lenovo in April 2025, the PC producer has launched firmware updates (model 4.8.0) to mitigate the vulnerabilities and has labored with the Chinese language firm SigmaStar to launch a software that plugs the difficulty.
“This primary-of-its-kind assault highlights a refined however deeply problematic vector: enterprise and shopper computer systems usually belief their inner and exterior peripherals, even when these peripherals are able to working their very own working techniques and accepting distant directions,” Eclypsium mentioned.
“Within the context of Linux webcams, unsigned or poorly protected firmware permits an attacker to subvert not simply the host but additionally any future hosts the digicam connects to, propagating the an infection and sidestepping conventional controls.”
