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Fujitsu wireless keyboard model vulnerable to keystroke injection attacks

Fujitsu wireless keyboard

Symbol: SySS GmbH

Fujitsu LX wi-fi keyboards are prone to keystroke injections, SySS GmbH, a German pen-testing company published as of late.

The assaults permit a danger actor to beam wi-fi radio indicators to the keyboard’s receiver (USB dongle) and inject rogue keyboard presses on a consumer’s pc.

Fujitsu was once notified of the vulnerability however has now not launched any firmware patches.

Trojan horse led to by way of developer blunder

In a record revealed as of late, SySS GmbH safety researcher Matthias Deeg mentioned the vulnerability isn’t led to by way of the keyboard and its USB receiver the use of vulnerable cryptography. In reality, the 2 elements paintings by the use of a correctly secured communications channel.

As a substitute, the flaw is living with the USB receiver by myself, which but even so accepting the keyboard’s encrypted communications additionally accepts unencrypted information packets that use the structure described in a demo design equipment that Fujitsu devs seem to have left in the back of at the USB dongle.

Moreover, Deeg says that if this keystroke injection assault may be paired with some other older Fujitsu wi-fi keyboard “replay assault” he reported in 2016, a danger actor can “remotely assault pc programs with an lively display lock,” and plant malware on reputedly safe programs.

In an interview as of late, Deeg advised ZDNet that he reported the flaw to Fujitsu in October remaining 12 months, however has now not heard from the corporate since October 30.

“In my communique with Fujitsu in regards to the keystroke injection vulnerability, I didn’t obtain any comments referring to a patch for this safety factor,” the researcher advised us when once we inquired if Fujitsu intimated repair may well be launched sooner or later, even after his public disclosure.

Probabilities for a firmware patch are in reality slender. Deeg additionally advised ZDNet that Fujitsu have not even patched the 2016 vulnerability, let by myself supply a timeline for this remaining one.

In a reaction equipped on the time and that Deeg shared with ZDNet, the corporate did not view patching the replay assault as a concern.

Thanks very a lot to your details about our wi-fi keyboard. As we’ve got already identified, we imagine that the described situation isn’t simple to accomplish beneath actual prerequisites because of the radio protocol used. As discussed, our product isn’t destined to promote safety, however comfort within the first position (with out the protection drawbacks of unencrypted wi-fi keyboards). Any new data and insights will probably be integrated into the already deliberate successor product.

In a demo video the SySS safety researcher revealed on YouTube, the researcher presentations off a elementary radio rig for pulling off a keystroke injection assault.

The radio equipment, as can also be observed above, can also be simply hid beneath garments and a danger actor can inject malware into unattended programs simply by strolling by way of centered computer systems.

“I don’t counsel the use of this inclined keyboard in an atmosphere with upper safety calls for,” Deeg advised us. “And I might advise now not the use of it in uncovered puts the place exterior attackers would possibly come simply within the 2.four GHz radio communique vary of the wi-fi keyboard.”

“And if I used to be an organization or a public authority and I did not agree with the folks gaining access to my premises, like staff, contractors, or guests, I might additionally now not use inclined keyboards with my pc programs,” Deeg mentioned.

The researcher additionally added that the most efficient mitigation can be for corporations to deploy in depth controls of the place wi-fi keyboards must be used.

Different fashions perhaps impacted

Deeg examined just a Fujitsu LX901 wi-fi mouse and keyboard set, then again he mentioned that different LX fashions are perhaps impacted as neatly.

“It’s imaginable that the opposite to be had wi-fi desktop set Fujitsu Wi-fi Keyboard Set LX390 makes use of the similar 2.four GHz radio generation and may be suffering from a keystroke injection and/or replay vulnerability. I’ve simplest examined the LX901, as a result of in our earlier analysis venture “Of Mice and Keyboards: At the Safety of Fashionable Wi-fi Desktop Units” my colleague Gerhard Klostermeier and I simplest analyzed wi-fi desktop units the use of AES encryption.”

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