CVE-2021-20859 : ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmwar

ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attacker to execute an arbitrary OS command via unspecified vectors.

Published 2021-12-01 03:15:07

Updated 2021-12-02 15:24:06

Source JPCERT/CC

View at NVD, CVE.org

Products affected by CVE-2021-20859

Elecom » Wrc-2533gst2 Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:wrc-2533gst2_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gst2 » Version: N/A
Elecom » Wrc-1167gst2 Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:wrc-1167gst2_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-1167gst2 » Version: N/A
Elecom » Wrc-1167gst2a Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:wrc-1167gst2a_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-1167gst2a » Version: N/A
Elecom » Wrc-1167gst2h Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:wrc-1167gst2h_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-1167gst2h » Version: N/A
Elecom » Wrc-2533gs2-b Firmware
Versions up to, including, (<=) 1.52
cpe:2.3:o:elecom:wrc-2533gs2-b_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gs2-b » Version: N/A
Elecom » Wrc-2533gs2-w Firmware
Versions up to, including, (<=) 1.52
cpe:2.3:o:elecom:wrc-2533gs2-w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gs2-w » Version: N/A
Elecom » Wrc-1750gs Firmware
Versions up to, including, (<=) 1.03
cpe:2.3:o:elecom:wrc-1750gs_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-1750gs » Version: N/A
Elecom » Wrc-1750gsv Firmware
Versions up to, including, (<=) 2.11
cpe:2.3:o:elecom:wrc-1750gsv_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-1750gsv » Version: N/A
Elecom » Wrc-1900gst Firmware
Versions up to, including, (<=) 1.03
cpe:2.3:o:elecom:wrc-1900gst_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-1900gst » Version: N/A
Elecom » Wrc-2533gst Firmware
Versions up to, including, (<=) 1.03
cpe:2.3:o:elecom:wrc-2533gst_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gst » Version: N/A
Elecom » Wrc-2533gsta Firmware
Versions up to, including, (<=) 1.03
cpe:2.3:o:elecom:wrc-2533gsta_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gsta » Version: N/A
Elecom » Wrc-2533gst2sp Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:wrc-2533gst2sp_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gst2sp » Version: N/A
Elecom » Wrc-2533gst2-g Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:wrc-2533gst2-g_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Wrc-2533gst2-g » Version: N/A
Elecom » Edwrc-2533gst2 Firmware
Versions up to, including, (<=) 1.25
cpe:2.3:o:elecom:edwrc-2533gst2_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Elecom » Edwrc-2533gst2 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-20859

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 11 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20859

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.7	HIGH	AV:A/AC:L/Au:S/C:C/I:C/A:C	5.1	10.0	NIST
Access Vector: Adjacent Network Access Complexity: Low Authentication: Single Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
8.0	HIGH	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.1	5.9	NIST
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-20859

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-20859

https://jvn.jp/en/jp/JVN88993473/index.html

JVN#88993473: Multiple vulnerabilities in multiple ELECOM LAN routers
Third Party Advisory

CVEs referencing this url
https://www.elecom.co.jp/news/security/20211130-01/

無線LANルーターのセキュリティ向上のためのファームウェアアップデートのお願い - 最新情報 - セキュリティ情報｜ELECOM
Vendor Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2021-20859

Products affected by CVE-2021-20859

Exploit prediction scoring system (EPSS) score for CVE-2021-20859

CVSS scores for CVE-2021-20859

CWE ids for CVE-2021-20859

References for CVE-2021-20859