VAR-201910-0871
Vulnerability from variot - Updated: 2024-11-23 23:04An issue was discovered on Fujitsu Wireless Keyboard Set LX390 GK381 devices. Because of the lack of proper encryption of 2.4 GHz communication, an attacker is able to eavesdrop on sensitive data such as passwords. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
Advisory ID: SYSS-2019-010 Product: Wireless Keyboard Set LX390 Manufacturer: Fujitsu Affected Version(s): Model No. GK381 Tested Version(s): Model No. GK381 Vulnerability Type: Missing Encryption of Sensitive Data (CWE-311) Risk Level: High Solution Status: Open (product reached end-of-life (EOL) in May 2019) Manufacturer Notification: 2019-04-01 Solution Date: - Public Disclosure: 2019-10-23 CVE Reference: CVE-2019-18201 Author of Advisory: Matthias Deeg (SySS GmbH)
Overview:
Fujitsu Wireless Keyboard Set LX390 is a wireless desktop set consisting
of a mouse and a keyboard.
The manufacturer describes the product as follows (see [1, 2]):
"The Wireless Keyboard Set LX390 is an excellent desktop solution for
users with ambition. This durable keyboard set is equipped with secure
2.4 GHz technology and plug and play technology. The elegant mouse works
on most surfaces due to its precise 1000 dpi sensor.
However, the payload and checksum of data packets are transmitted in an
encoded way using so-called data whitening or data scrambling of the
used 2.4 GHz radio transceiver. Thus, without knowing this data
whitening mechanism and its configuration, an attacker cannot actually
gain access to the cleartext payload contents of transmitted radio
packets during a sniffing attack.
By analyzing the Fujitsu LX390 keyboard and its radio communication,
SySS was able to identify the used communication protocol, the data
whitening mechanism, and how to find the correct data whitening
configuration by sniffing the radio communication of a specific
keyboard.
With this knowledge, an attacker can remotely analyze and decode sent
keyboard events of a Fujitsu LX390 keyboard as cleartext, for instance
keystrokes, and thus gain unauthorized access to sensitive data like
passwords.
Knowing how to analyze the data communication of a Fujitsu LX390
keyboard also enabled SySS to synthesize valid data packets which
allowed for key stroke injection attacks, which are described in the
SySS security advisory SYSS-2019-011 (see [3]).
Proof of Concept (PoC):
SySS GmbH could successfully perform sniffing attacks against the 2.4 GHz radio communication of the Fujitsu LX390 keyboard using a software-defined radio and an in-house developed software tool utilizing GNU Radio [3].
For the protocol analysis,the software tool Universal Radio Hacker [4] was used.
SySS GmbH could also perform successful sniffing attacks using another in-house developed software tool in combination with the USB radio dongle Crazyradio PA and the nrf-research-firmware by Bastille Networks Internet Security written by Marc Newlin (see [6] and [7]).
The following output of the developed PoC software tool illustrates a successful keystroke sniffing attack.
python3 fujitsu_lx390_sniffer.py -l -p "3b:5b:53:bd:43" -c 28
_ __ _ _ _ _ __ __
| |/ / _ _ | | _ __ ___ | | / | _ __ ()/ |/ | ___ _ __
| ' // _ \ | | / __| __| '__/ _ | |/ / _ \ ___ | ' | | || | / _ \ '|
| . \ __/ || _ \ || | | (_) | < __/ ) | | | | | | | / |
||____|__, |/_|| _/||____| |_/|| |||| || ___||
|___/
SySS Fujitsu LX390 Keystroke Sniffer - PoC Tool v0.1 by Matthias Deeg - SySS GmbH
Based on different tools by Marc Newlin
3B:5B:53:BD:43:DB 42:EF:F5:0A:2D 02:45:13:93:AB KEY_P 3B:5B:53:BD:43:DB 42:CF:F5:0C:CB 02:41:13:F3:CC KEY_P 3B:5B:53:BD:43:DB 42:EF:F5:0A:2D 02:45:13:93:AB KEY_P 3B:5B:53:BD:43:DB 42:CF:1D:70:ED 02:41:04:CD:A8 KEY_A 3B:5B:53:BD:43:DB 42:EF:1D:76:0B 02:45:04:AD:CF KEY_A 3B:5B:53:BD:43:DB 42:CF:1D:70:ED 02:41:04:CD:A8 KEY_A 3B:5B:53:BD:43:DB 42:EF:55:BF:C7 02:45:16:3E:FC KEY_S 3B:5B:53:BD:43:DB 42:CF:55:B9:21 02:41:16:5E:9B KEY_S 3B:5B:53:BD:43:DB 42:EF:55:BF:C7 02:45:16:3E:FC KEY_S 3B:5B:53:BD:43:DB 42:EF:65:89:94 02:45:1A:52:36 KEY_W (...)
Solution:
The Fujitsu Wireless Keyboard Set LX390 reached its end-of-life (EOL) in
May 2019.
SySS recommends replacing LX390 wireless keyboard sets used in
environments with higher security demands, for instance with one of the
newer successor models LX410 or LX960.
Disclosure Timeline:
2019-04-01: Vulnerability reported to manufacturer 2019-04-02: Fujitsu confirms receipt of security advisory and asks questions regarding the reported security issue; answered open questions 2019-04-11: Received further questions from manufacturer 2019-04-18: Answered open questions and postponed disclosure date 2019-10-08: Reminded manufacturer of the upcoming release of the security advisory 2019-10-18: Discussed details of coordinated disclosure with manufacturer 2019-10-21: Public release of security advisory
References:
[1] Product website for Fujitsu Wireless Keyboard Set LX390
https://www.fujitsu.com/global/products/computing/peripheral/accessories/input-devices/keyboards/keyboard-lx390.html
[2] Data sheet Fujitsu Wireless Keyboard Set LX390
https://produktinfo.conrad.com/datenblaetter/1300000-1399999/001375431-da-01-en-FUJITSU_DESKTOP_SET_WIREL_LX390_WEISS.pdf
[3] SySS Security Advisory SYSS-2019-011
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-011.txt
[4] GNU Radio
https://www.gnuradio.org/
[5] Universal Radio Hacker (URH)
https://github.com/jopohl/urh
[6] Product website for Crazyradio PA
https://www.bitcraze.io/crazyradio-pa/
[7] Bastille's nRF24 research firmware and tools
https://github.com/BastilleResearch/nrf-research-firmware
[8] Product website for Fujitsu Wireless Keyboard Set LX410
https://www.fujitsu.com/global/products/computing/peripheral/accessories/input-devices/keyboards/keyboard-lx410.html
[9] Product website for Fujitsu Wireless Keyboard Set LX960
https://www.fujitsu.com/global/products/computing/peripheral/accessories/input-devices/keyboards/keyboard-lx960.html
[10] SySS Security Advisory SYSS-2019-010
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-010.txt
[11] SySS Responsible Disclosure Policy
https://www.syss.de/en/responsible-disclosure-policy/
Credits:
This security vulnerability was found by Matthias Deeg of SySS GmbH.
E-Mail: matthias.deeg (at) syss.de Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Matthias_Deeg.asc Key fingerprint = D1F0 A035 F06C E675 CDB9 0514 D9A4 BF6A 34AD 4DAB
Disclaimer:
The information provided in this security advisory is provided "as is"
and without warranty of any kind. Details of this security advisory may
be updated in order to provide as accurate information as possible. The
latest version of this security advisory is available on the SySS Web
site.
Copyright:
Creative Commons - Attribution (by) - Version 3.0 URL: http://creativecommons.org/licenses/by/3.0/deed.en
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"data": "An issue was discovered on Fujitsu Wireless Keyboard Set LX390 GK381 devices. Because of the lack of proper encryption of 2.4 GHz communication, an attacker is able to eavesdrop on sensitive data such as passwords. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA512\n\nAdvisory ID: SYSS-2019-010\nProduct: Wireless Keyboard Set LX390\nManufacturer: Fujitsu\nAffected Version(s): Model No. GK381\nTested Version(s): Model No. GK381\nVulnerability Type: Missing Encryption of Sensitive Data (CWE-311)\nRisk Level: High\nSolution Status: Open (product reached end-of-life (EOL) in May 2019)\nManufacturer Notification: 2019-04-01\nSolution Date: -\nPublic Disclosure: 2019-10-23 \nCVE Reference: CVE-2019-18201\nAuthor of Advisory: Matthias Deeg (SySS GmbH)\n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nOverview:\n\nFujitsu Wireless Keyboard Set LX390 is a wireless desktop set consisting\nof a mouse and a keyboard. \n\nThe manufacturer describes the product as follows (see [1, 2]):\n\n\"The Wireless Keyboard Set LX390 is an excellent desktop solution for\nusers with ambition. This durable keyboard set is equipped with secure\n2.4 GHz technology and plug and play technology. The elegant mouse works\non most surfaces due to its precise 1000 dpi sensor. \n\nHowever, the payload and checksum of data packets are transmitted in an\nencoded way using so-called data whitening or data scrambling of the\nused 2.4 GHz radio transceiver. Thus, without knowing this data\nwhitening mechanism and its configuration, an attacker cannot actually\ngain access to the cleartext payload contents of transmitted radio\npackets during a sniffing attack. \n\nBy analyzing the Fujitsu LX390 keyboard and its radio communication,\nSySS was able to identify the used communication protocol, the data\nwhitening mechanism, and how to find the correct data whitening\nconfiguration by sniffing the radio communication of a specific\nkeyboard. \n\nWith this knowledge, an attacker can remotely analyze and decode sent\nkeyboard events of a Fujitsu LX390 keyboard as cleartext, for instance\nkeystrokes, and thus gain unauthorized access to sensitive data like\npasswords. \n\nKnowing how to analyze the data communication of a Fujitsu LX390\nkeyboard also enabled SySS to synthesize valid data packets which\nallowed for key stroke injection attacks, which are described in the\nSySS security advisory SYSS-2019-011 (see [3]). \n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nProof of Concept (PoC):\n\nSySS GmbH could successfully perform sniffing attacks against the\n2.4 GHz radio communication of the Fujitsu LX390 keyboard using a\nsoftware-defined radio and an in-house developed software tool utilizing\nGNU Radio [3]. \n\nFor the protocol analysis,the software tool Universal Radio Hacker [4]\nwas used. \n\nSySS GmbH could also perform successful sniffing attacks using another\nin-house developed software tool in combination with the USB radio\ndongle Crazyradio PA and the nrf-research-firmware by Bastille Networks\nInternet Security written by Marc Newlin (see [6] and [7]). \n\nThe following output of the developed PoC software tool illustrates a\nsuccessful keystroke sniffing attack. \n\n# python3 fujitsu_lx390_sniffer.py -l -p \"3b:5b:53:bd:43\" -c 28\n _ __ _ _ ____ _ __ __ \n | |/ /___ _ _ ___| |_ _ __ ___ | | _____ / ___| _ __ (_)/ _|/ _| ___ _ __ \n | \u0027 // _ \\ | | / __| __| \u0027__/ _ \\| |/ / _ \\ \\___ \\| \u0027_ \\| | |_| |_ / _ \\ \u0027__|\n | . \\ __/ |_| \\__ \\ |_| | | (_) | \u003c __/ ___) | | | | | _| _| __/ | \n |_|\\_\\___|\\__, |___/\\__|_| \\___/|_|\\_\\___| |____/|_| |_|_|_| |_| \\___|_| \n |___/ \nSySS Fujitsu LX390 Keystroke Sniffer - PoC Tool v0.1 by Matthias Deeg - SySS GmbH\nBased on different tools by Marc Newlin\n- ---\n3B:5B:53:BD:43:DB 42:EF:F5:0A:2D 02:45:13:93:AB KEY_P\n3B:5B:53:BD:43:DB 42:CF:F5:0C:CB 02:41:13:F3:CC KEY_P\n3B:5B:53:BD:43:DB 42:EF:F5:0A:2D 02:45:13:93:AB KEY_P\n3B:5B:53:BD:43:DB 42:CF:1D:70:ED 02:41:04:CD:A8 KEY_A\n3B:5B:53:BD:43:DB 42:EF:1D:76:0B 02:45:04:AD:CF KEY_A\n3B:5B:53:BD:43:DB 42:CF:1D:70:ED 02:41:04:CD:A8 KEY_A\n3B:5B:53:BD:43:DB 42:EF:55:BF:C7 02:45:16:3E:FC KEY_S\n3B:5B:53:BD:43:DB 42:CF:55:B9:21 02:41:16:5E:9B KEY_S\n3B:5B:53:BD:43:DB 42:EF:55:BF:C7 02:45:16:3E:FC KEY_S\n3B:5B:53:BD:43:DB 42:EF:65:89:94 02:45:1A:52:36 KEY_W\n(...)\n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nSolution:\n\nThe Fujitsu Wireless Keyboard Set LX390 reached its end-of-life (EOL) in\nMay 2019. \n\nSySS recommends replacing LX390 wireless keyboard sets used in\nenvironments with higher security demands, for instance with one of the\nnewer successor models LX410 or LX960. \n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nDisclosure Timeline:\n\n2019-04-01: Vulnerability reported to manufacturer\n2019-04-02: Fujitsu confirms receipt of security advisory and asks\n questions regarding the reported security issue;\n answered open questions\n2019-04-11: Received further questions from manufacturer\n2019-04-18: Answered open questions and postponed disclosure date\n2019-10-08: Reminded manufacturer of the upcoming release of the\n security advisory\n2019-10-18: Discussed details of coordinated disclosure with\n manufacturer\n2019-10-21: Public release of security advisory\n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nReferences:\n\n[1] Product website for Fujitsu Wireless Keyboard Set LX390\n https://www.fujitsu.com/global/products/computing/peripheral/accessories/input-devices/keyboards/keyboard-lx390.html\n[2] Data sheet Fujitsu Wireless Keyboard Set LX390\n https://produktinfo.conrad.com/datenblaetter/1300000-1399999/001375431-da-01-en-FUJITSU_DESKTOP_SET_WIREL_LX390_WEISS.pdf\n[3] SySS Security Advisory SYSS-2019-011\n https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-011.txt\n[4] GNU Radio\n https://www.gnuradio.org/\n[5] Universal Radio Hacker (URH)\n https://github.com/jopohl/urh\n[6] Product website for Crazyradio PA\n https://www.bitcraze.io/crazyradio-pa/\n[7] Bastille\u0027s nRF24 research firmware and tools\n https://github.com/BastilleResearch/nrf-research-firmware\n[8] Product website for Fujitsu Wireless Keyboard Set LX410\n https://www.fujitsu.com/global/products/computing/peripheral/accessories/input-devices/keyboards/keyboard-lx410.html\n[9] Product website for Fujitsu Wireless Keyboard Set LX960\n https://www.fujitsu.com/global/products/computing/peripheral/accessories/input-devices/keyboards/keyboard-lx960.html\n[10] SySS Security Advisory SYSS-2019-010\n https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-010.txt\n[11] SySS Responsible Disclosure Policy\n https://www.syss.de/en/responsible-disclosure-policy/\n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nCredits:\n\nThis security vulnerability was found by Matthias Deeg of SySS GmbH. \n\nE-Mail: matthias.deeg (at) syss.de\nPublic Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Matthias_Deeg.asc\nKey fingerprint = D1F0 A035 F06C E675 CDB9 0514 D9A4 BF6A 34AD 4DAB\n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nDisclaimer:\n\nThe information provided in this security advisory is provided \"as is\" \nand without warranty of any kind. Details of this security advisory may \nbe updated in order to provide as accurate information as possible. The\nlatest version of this security advisory is available on the SySS Web \nsite. \n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nCopyright:\n\nCreative Commons - Attribution (by) - Version 3.0\nURL: http://creativecommons.org/licenses/by/3.0/deed.en\n\n-----BEGIN PGP SIGNATURE-----\n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\nlpFMUy3CyDUJmP2mT5uzsGqp+nj97TBWgdPcaccd7xEeWxU9xW4=\n=Noe8\n-----END PGP SIGNATURE-----\n\n",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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