More than 450 HP laptop models have a keylogger hidden away in a driver, forcing HP to issue patches for the affected devices.
The keylogger, found in Synaptics' touchpad software, is disabled by default, but hackers could potentially enable it if they had access to a computer by elevating user privileges, said Michael Myng, the researcher who discovered the flaw.
Commericial workstations, consumer laptops and other HP products contain the flaw, including Spectre devices, Pavilion devices, ZBooks and others.
"A potential security vulnerability has been identified with certain versions of Synaptics touchpad drivers that impacts all Synaptics OEM partners," an HP statement on its security bulletin read.
"A party would need administrative privileges in order to take advantage of the vulnerability. Neither Synaptics nor HP has access to customer data as a result of this issue."
Myng discovered the issue when trying to control the backlighting of an HP keyboard, noticing a format string for a keylogger when looking through the keyboard driver. Unable to find an HP laptop to test his findings, he contacted HP directly.
"They replied terrificly [sic] fast, confirmed the presence of the keylogger (which actually was a debug trace) and released an update that removes the trace," he said.
HP claims the keylogger in Synaptics' touchpad was created to debug errors. If activated however, a hacker could track every letter a laptop user typed.
Worth updating with a quick line - they say sorry and working on updating drivers with a patch, don't give people admin access in the meantime
A Synaptics spokesperson apologised for the error and advised users to change their admin settings to prevent anyone taking advantage of the flaw before it's fixed.
"Synaptics is working closely with our PC customers to update drivers and to deploy them to address security concerns," they said. "Synaptics also recommends using best practices by restricting admin access to any system as anyone with this level of access can potentially install malware or other anti-privacy software irrespective of whether the debug tool is on or off."
They added: "In our new normal of heightened concern for security and privacy, Synaptics would like to apologise for any concerns that our debug tool may have raised. We have a path to immediately address this issue and other security concerns should they arise."
A keylogger was also discovered in Synaptics subsidiary Conexant's audio drivers, also installed in HP laptops, back in May.
An HP spokesperson said: "HP was advised of an issue that exists with Synaptics' touchpad drivers that impacts all Synaptics OEM partners. HP uses Synaptics' touchpads in some of its mobile PCs and has worked with Synaptics to provide fixes to their error for impacted HP systems, available in the security bulletin on HP.com. HP has no access to customer data as a result of this issue."
Picture: HP Spectre x360/Credit: IT Pro
