Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-20716

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
28/04/2021
Last modified:
07/05/2021

Description

Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 and prior, WLI3-TX1-G54 firmware Ver.2.53 and prior, WLI-T1-B11 firmware Ver.2.20 and prior, WLI-TX1-G54 firmware Ver.2.20 and prior, WVR-G54-NF firmware Ver.2.02 and prior, WZR-G108 firmware Ver.2.41 and prior, WZR-G54 firmware Ver.2.41 and prior, WZR-HP-G54 firmware Ver.2.41 and prior, WZR-RS-G54 firmware Ver.2.55 and prior, and WZR-RS-G54HP firmware Ver.2.55 and prior) allows a remote attacker to enable the debug option and to execute arbitrary code or OS commands, change the configuration, and cause a denial of service (DoS) condition.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL
Vector 2.0
AV:N/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 10.00 HIGH
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
10.00
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:buffalo:bhr-4rv_firmware:*:*:*:*:*:*:*:* 2.55 (including)
cpe:2.3:h:buffalo:bhr-4rv:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:fs-g54_firmware:*:*:*:*:*:*:*:* 2.04 (including)
cpe:2.3:h:buffalo:fs-g54:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wbr2-b11_firmware:*:*:*:*:*:*:*:* 2.32 (including)
cpe:2.3:h:buffalo:wbr2-b11:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wbr2-g54_firmware:*:*:*:*:*:*:*:* 2.32 (including)
cpe:2.3:h:buffalo:wbr2-g54:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wbr2-g54-kd_firmware:*:*:*:*:*:*:*:* 2.32 (including)
cpe:2.3:h:buffalo:wbr2-g54-kd:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wbr-b11_firmware:*:*:*:*:*:*:*:* 2.23 (including)
cpe:2.3:h:buffalo:wbr-b11:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wbr-g54_firmware:*:*:*:*:*:*:*:* 2.23 (including)
cpe:2.3:h:buffalo:wbr-g54:-:*:*:*:*:*:*:*
cpe:2.3:o:buffalo:wbr-g54l_firmware:*:*:*:*:*:*:*:* 2.20 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools