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CVE-2022-40966: Multiple vulnerabilities in Buffalo network devices

Authentication bypass vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to bypass authentication and access the device. The affected products/versions are as follows: WCR-300 firmware Ver. 1.87 and earlier, WHR-HP-G300N firmware Ver. 2.00 and earlier, WHR-HP-GN firmware Ver. 1.87 and earlier, WPL-05G300 firmware Ver. 1.88 and earlier, WRM-D2133HP firmware Ver. 2.85 and earlier, WRM-D2133HS firmware Ver. 2.96 and earlier, WTR-M2133HP firmware Ver. 2.85 and earlier, WTR-M2133HS firmware Ver. 2.96 and earlier, WXR-1900DHP firmware Ver. 2.50 and earlier, WXR-1900DHP2 firmware Ver. 2.59 and earlier, WXR-1900DHP3 firmware Ver. 2.63 and earlier, WXR-5950AX12 firmware Ver. 3.40 and earlier, WXR-6000AX12B firmware Ver. 3.40 and earlier, WXR-6000AX12S firmware Ver. 3.40 and earlier, WZR-300HP firmware Ver. 2.00 and earlier, WZR-450HP firmware Ver. 2.00 and earlier, WZR-600DHP firmware Ver. 2.00 and earlier, WZR-900DHP firmware Ver. 1.15 and earlier, WZR-1750DHP2 firmware Ver. 2.31 and earlier, WZR-HP-AG300H firmware Ver. 1.76 and earlier, WZR-HP-G302H firmware Ver. 1.86 and earlier, WEM-1266 firmware Ver. 2.85 and earlier, WEM-1266WP firmware Ver. 2.85 and earlier, WLAE-AG300N firmware Ver. 1.86 and earlier, FS-600DHP firmware Ver. 3.40 and earlier, FS-G300N firmware Ver. 3.14 and earlier, FS-HP-G300N firmware Ver. 3.33 and earlier, FS-R600DHP firmware Ver. 3.40 and earlier, BHR-4GRV firmware Ver. 2.00 and earlier, DWR-HP-G300NH firmware Ver. 1.84 and earlier, DWR-PG firmware Ver. 1.83 and earlier, HW-450HP-ZWE firmware Ver. 2.00 and earlier, WER-A54G54 firmware Ver. 1.43 and earlier, WER-AG54 firmware Ver. 1.43 and earlier, WER-AM54G54 firmware Ver. 1.43 and earlier, WER-AMG54 firmware Ver. 1.43 and earlier, WHR-300 firmware Ver. 2.00 and earlier, WHR-300HP firmware Ver. 2.00 and earlier, WHR-AM54G54 firmware Ver. 1.43 and earlier, WHR-AMG54 firmware Ver. 1.43 and earlier, WHR-AMPG firmware Ver. 1.52 and earlier, WHR-G firmware Ver. 1.49 and earlier, WHR-G300N firmware Ver. 1.65 and earlier, WHR-G301N firmware Ver. 1.87 and earlier, WHR-G54S firmware Ver. 1.43 and earlier, WHR-G54S-NI firmware Ver. 1.24 and earlier, WHR-HP-AMPG firmware Ver. 1.43 and earlier, WHR-HP-G firmware Ver. 1.49 and earlier, WHR-HP-G54 firmware Ver. 1.43 and earlier, WLI-H4-D600 firmware Ver. 1.88 and earlier, WS024BF firmware Ver. 1.60 and earlier, WS024BF-NW firmware Ver. 1.60 and earlier, WXR-1750DHP firmware Ver. 2.60 and earlier, WXR-1750DHP2 firmware Ver. 2.60 and earlier, WZR-1166DHP firmware Ver. 2.18 and earlier, WZR-1166DHP2 firmware Ver. 2.18 and earlier, WZR-1750DHP firmware Ver. 2.30 and earlier, WZR2-G300N firmware Ver. 1.55 and earlier, WZR-450HP-CWT firmware Ver. 2.00 and earlier, WZR-450HP-UB firmware Ver. 2.00 and earlier, WZR-600DHP2 firmware Ver. 1.15 and earlier, WZR-600DHP3 firmware Ver. 2.19 and earlier, WZR-900DHP2 firmware Ver. 2.19 and earlier, WZR-AGL300NH firmware Ver. 1.55 and earlier, WZR-AMPG144NH firmware Ver. 1.49 and earlier, WZR-AMPG300NH firmware Ver. 1.51 and earlier, WZR-D1100H firmware Ver. 2.00 and earlier, WZR-G144N firmware Ver. 1.48 and earlier, WZR-G144NH firmware Ver. 1.48 and earlier, WZR-HP-G300NH firmware Ver. 1.84 and earlier, WZR-HP-G301NH firmware Ver. 1.84 and earlier, WZR-HP-G450H firmware Ver. 1.90 and earlier, WZR-S1750DHP firmware Ver. 2.32 and earlier, WZR-S600DHP firmware Ver. 2.19 and earlier, and WZR-S900DHP firmware Ver. 2.19 and earlier.

CVE
Open in Source
#vulnerability#js#hard_coded_credentials#auth

Published:2022/10/04 Last Updated:2022/10/11

Overview

Multiple network devices provided by Buffalo Inc. contain multiple vulnerabilities.

Products Affected

CVE-2022-39044

  • WCR-300 firmware Ver. 1.87 and earlier
  • WHR-HP-G300N firmware Ver. 2.00 and earlier
  • WHR-HP-GN firmware Ver. 1.87 and earlier
  • WPL-05G300 firmware Ver. 1.88 and earlier
  • WZR-300HP firmware Ver. 2.00 and earlier
  • WZR-450HP firmware Ver. 2.00 and earlier
  • WZR-600DHP firmware Ver. 2.00 and earlier
  • WZR-900DHP firmware Ver. 1.15 and earlier
  • WZR-HP-AG300H firmware Ver. 1.76 and earlier
  • WZR-HP-G302H firmware Ver. 1.86 and earlier
  • WLAE-AG300N firmware Ver. 1.86 and earlier
  • FS-600DHP firmware Ver. 3.40 and earlier
  • FS-G300N firmware Ver. 3.14 and earlier
  • FS-HP-G300N firmware Ver. 3.33 and earlier
  • FS-R600DHP firmware Ver. 3.40 and earlier
  • BHR-4GRV firmware Ver. 2.00 and earlier
  • DWR-HP-G300NH firmware Ver. 1.84 and earlier
  • DWR-PG firmware Ver. 1.83 and earlier
  • HW-450HP-ZWE firmware Ver. 2.00 and earlier
  • WER-A54G54 firmware Ver. 1.43 and earlier
  • WER-AG54 firmware Ver. 1.43 and earlier
  • WER-AM54G54 firmware Ver. 1.43 and earlier
  • WER-AMG54 firmware Ver. 1.43 and earlier
  • WHR-300 firmware Ver. 2.00 and earlier
  • WHR-300HP firmware Ver. 2.00 and earlier
  • WHR-AM54G54 firmware Ver. 1.43 and earlier
  • WHR-AMG54 firmware Ver. 1.43 and earlier
  • WHR-AMPG firmware Ver. 1.52 and earlier
  • WHR-G firmware Ver. 1.49 and earlier
  • WHR-G300N firmware Ver. 1.65 and earlier
  • WHR-G301N firmware Ver. 1.87 and earlier
  • WHR-G54S firmware Ver. 1.43 and earlier
  • WHR-G54S-NI firmware Ver. 1.24 and earlier
  • WHR-HP-AMPG firmware Ver. 1.43 and earlier
  • WHR-HP-G firmware Ver. 1.49 and earlier
  • WHR-HP-G54 firmware Ver. 1.43 and earlier
  • WLI-H4-D600 firmware Ver. 1.88 and earlier
  • WLI-TX4-AG300N firmware Ver. 1.53 and earlier
  • WS024BF firmware Ver. 1.60 and earlier
  • WS024BF-NW firmware Ver. 1.60 and earlier
  • WZR2-G108 firmware Ver. 1.33 and earlier
  • WZR2-G300N firmware Ver. 1.55 and earlier
  • WZR-450HP-CWT firmware Ver. 2.00 and earlier
  • WZR-450HP-UB firmware Ver. 2.00 and earlier
  • WZR-600DHP2 firmware Ver. 1.15 and earlier
  • WZR-AGL300NH firmware Ver. 1.55 and earlier
  • WZR-AMPG144NH firmware Ver. 1.49 and earlier
  • WZR-AMPG300NH firmware Ver. 1.51 and earlier
  • WZR-D1100H firmware Ver. 2.00 and earlier
  • WZR-G144N firmware Ver. 1.48 and earlier
  • WZR-G144NH firmware Ver. 1.48 and earlier
  • WZR-HP-G300NH firmware Ver. 1.84 and earlier
  • WZR-HP-G301NH firmware Ver. 1.84 and earlier
  • WZR-HP-G450H firmware Ver. 1.90 and earlier

CVE-2022-34840

  • WZR-300HP firmware Ver. 2.00 and earlier
  • WZR-450HP firmware Ver. 2.00 and earlier
  • WZR-600DHP firmware Ver. 2.00 and earlier
  • WZR-900DHP firmware Ver. 1.15 and earlier
  • HW-450HP-ZWE firmware Ver. 2.00 and earlier
  • WZR-450HP-CWT firmware Ver. 2.00 and earlier
  • WZR-450HP-UB firmware Ver. 2.00 and earlier
  • WZR-600DHP2 firmware Ver. 1.15 and earlier
  • WZR-D1100H firmware Ver. 2.00 and earlier

CVE-2022-40966

  • WCR-300 firmware Ver. 1.87 and earlier
  • WHR-HP-G300N firmware Ver. 2.00 and earlier
  • WHR-HP-GN firmware Ver. 1.87 and earlier
  • WPL-05G300 firmware Ver. 1.88 and earlier
  • WRM-D2133HP firmware Ver. 2.85 and earlier
  • WRM-D2133HS firmware Ver. 2.96 and earlier
  • WTR-M2133HP firmware Ver. 2.85 and earlier
  • WTR-M2133HS firmware Ver. 2.96 and earlier
  • WXR-1900DHP firmware Ver. 2.50 and earlier
  • WXR-1900DHP2 firmware Ver. 2.59 and earlier
  • WXR-1900DHP3 firmware Ver. 2.63 and earlier
  • WXR-5950AX12 firmware Ver. 3.40 and earlier
  • WXR-6000AX12B firmware Ver. 3.40 and earlier
  • WXR-6000AX12S firmware Ver. 3.40 and earlier
  • WZR-300HP firmware Ver. 2.00 and earlier
  • WZR-450HP firmware Ver. 2.00 and earlier
  • WZR-600DHP firmware Ver. 2.00 and earlier
  • WZR-900DHP firmware Ver. 1.15 and earlier
  • WZR-1750DHP2 firmware Ver. 2.31 and earlier
  • WZR-HP-AG300H firmware Ver. 1.76 and earlier
  • WZR-HP-G302H firmware Ver. 1.86 and earlier
  • WEM-1266 firmware Ver. 2.85 and earlier
  • WEM-1266WP firmware Ver. 2.85 and earlier
  • WLAE-AG300N firmware Ver. 1.86 and earlier
  • FS-600DHP firmware Ver. 3.40 and earlier
  • FS-G300N firmware Ver. 3.14 and earlier
  • FS-HP-G300N firmware Ver. 3.33 and earlier
  • FS-R600DHP firmware Ver. 3.40 and earlier
  • BHR-4GRV firmware Ver. 2.00 and earlier
  • DWR-HP-G300NH firmware Ver. 1.84 and earlier
  • DWR-PG firmware Ver. 1.83 and earlier
  • HW-450HP-ZWE firmware Ver. 2.00 and earlier
  • WER-A54G54 firmware Ver. 1.43 and earlier
  • WER-AG54 firmware Ver. 1.43 and earlier
  • WER-AM54G54 firmware Ver. 1.43 and earlier
  • WER-AMG54 firmware Ver. 1.43 and earlier
  • WHR-300 firmware Ver. 2.00 and earlier
  • WHR-300HP firmware Ver. 2.00 and earlier
  • WHR-AM54G54 firmware Ver. 1.43 and earlier
  • WHR-AMG54 firmware Ver. 1.43 and earlier
  • WHR-AMPG firmware Ver. 1.52 and earlier
  • WHR-G firmware Ver. 1.49 and earlier
  • WHR-G300N firmware Ver. 1.65 and earlier
  • WHR-G301N firmware Ver. 1.87 and earlier
  • WHR-G54S firmware Ver. 1.43 and earlier
  • WHR-G54S-NI firmware Ver. 1.24 and earlier
  • WHR-HP-AMPG firmware Ver. 1.43 and earlier
  • WHR-HP-G firmware Ver. 1.49 and earlier
  • WHR-HP-G54 firmware Ver. 1.43 and earlier
  • WLI-H4-D600 firmware Ver. 1.88 and earlier
  • WS024BF firmware Ver. 1.60 and earlier
  • WS024BF-NW firmware Ver. 1.60 and earlier
  • WXR-1750DHP firmware Ver. 2.60 and earlier
  • WXR-1750DHP2 firmware Ver. 2.60 and earlier
  • WZR-1166DHP firmware Ver. 2.18 and earlier
  • WZR-1166DHP2 firmware Ver. 2.18 and earlier
  • WZR-1750DHP firmware Ver. 2.30 and earlier
  • WZR2-G300N firmware Ver. 1.55 and earlier
  • WZR-450HP-CWT firmware Ver. 2.00 and earlier
  • WZR-450HP-UB firmware Ver. 2.00 and earlier
  • WZR-600DHP2 firmware Ver. 1.15 and earlier
  • WZR-600DHP3 firmware Ver. 2.19 and earlier
  • WZR-900DHP2 firmware Ver. 2.19 and earlier
  • WZR-AGL300NH firmware Ver. 1.55 and earlier
  • WZR-AMPG144NH firmware Ver. 1.49 and earlier
  • WZR-AMPG300NH firmware Ver. 1.51 and earlier
  • WZR-D1100H firmware Ver. 2.00 and earlier
  • WZR-G144N firmware Ver. 1.48 and earlier
  • WZR-G144NH firmware Ver. 1.48 and earlier
  • WZR-HP-G300NH firmware Ver. 1.84 and earlier
  • WZR-HP-G301NH firmware Ver. 1.84 and earlier
  • WZR-HP-G450H firmware Ver. 1.90 and earlier
  • WZR-S1750DHP firmware Ver. 2.32 and earlier
  • WZR-S600DHP firmware Ver. 2.19 and earlier
  • WZR-S900DHP firmware Ver. 2.19 and earlier

Description

Multiple network devices provided by Buffalo Inc. contain multiple vulnerabilities listed below.

  • Hidden Functionality (CWE-912) - CVE-2022-39044

    CVSS v3

    CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

    Base Score: 6.8

  • Use of Hard-coded Credentials (CWE-798) - CVE-2022-34840

    CVSS v3

    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

    Base Score: 4.3

  • Authentication Bypass (CWE-288) - CVE-2022-4096

    CVSS v3

    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

    Base Score: 8.8

Impact

  • A user logging into the affected product may execute arbitrary OS commands - CVE-2022-39044
  • A network-adjacent attacker may modify configuration settings of the device - CVE-2022-34840
  • A network-adjacent attacker may bypass authentication for the device - CVE-2022-4096

Solution

Update the firmware
Update firmware to the latest version according to the information provided by the developer.

Stop using the products
Some vulnerable products are no longer supported. For more information, refer to the security advisory from the developer and stop using the products.

Vendor Status

Vendor

Link

BUFFALO INC.

Multiple Vulnerabilities in network devices (Text in Japanese)

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Credit

Chuya Hayakawa of 00One, Inc. reported these vulnerabilities to JPCERT/CC.
JPCERT/CC coordinated with the developer.

Other Information

JPCERT Alert

JPCERT Reports

CERT Advisory

CPNI Advisory

TRnotes

CVE

CVE-2022-39044

CVE-2022-34840

CVE-2022-40966

JVN iPedia

Update History

2022/10/05

Fixed [Products Affected] section.

2022/10/11

Added information under [Products Affected] and [Solution] section

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