JVN#88993473: Multiple vulnerabilities in multiple ELECOM LAN routers

Multiple ELECOM LAN routers provided by ELECOM CO.,LTD. contain multiple vulnerabilities listed below.

Buffer overflow (CWE-121) - CVE-2021-20852

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	Base Score: 6.8
CVSS v2	AV:A/AC:L/Au:S/C:P/I:P/A:P	Base Score: 5.2

OS command injection (CWE-78) - CVE-2021-20853, CVE-2021-20854

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	Base Score: 6.8
CVSS v2	AV:A/AC:L/Au:S/C:P/I:P/A:P	Base Score: 5.2

Cross-site scripting (CWE-79) - CVE-2021-20855, CVE-2021-20856

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	Base Score: 5.4
CVSS v2	AV:N/AC:M/Au:S/C:N/I:P/A:N	Base Score: 3.5

Cross-site scripting (CWE-79) - CVE-2021-20857

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	Base Score: 6.1
CVSS v2	AV:N/AC:H/Au:N/C:N/I:P/A:N	Base Score: 2.6

Cross-site scripting (CWE-79) - CVE-2021-20858

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	Base Score: 5.4
CVSS v2	AV:N/AC:M/Au:S/C:N/I:P/A:N	Base Score: 3.5

OS command injection (CWE-78) - CVE-2021-20859

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Base Score: 8.0
CVSS v2	AV:A/AC:L/Au:S/C:C/I:C/A:C	Base Score: 7.7

Cross-site request forgery (CWE-352) - CVE-2021-20860

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	Base Score: 8.8
CVSS v2	AV:N/AC:H/Au:N/C:P/I:P/A:P	Base Score: 5.1

Improper access control (CWE-284) - CVE-2021-20861, CVE-2022-25915

Version	Vector	Score
CVSS v3	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Base Score: 8.8
CVSS v2	AV:A/AC:L/Au:N/C:P/I:P/A:P	Base Score: 5.8

Impact

• A network-adjacent attacker who can login to the management screen of the product may execute an arbitrary OS command - CVE-2021-20852, CVE-2021-20853, CVE-2021-20854
• An arbitrary script may be executed on a logged-in user’s web browser - CVE-2021-20855, CVE-2021-20856, CVE-2021-20857, CVE-2021-20858
• A network-adjacent attacker who can login to the product may execute an arbitrary OS command - CVE-2021-20859
• If a user accesses a specially crafted page while logged in, unintended operations may be performed - CVE-2021-20860
• A network-adjacent attacker may access to the management screen of the product without any authentication - CVE-2021-20861, CVE-2022-25915

Solution

Apply the appropriate firmware update
Apply the appropriate firmware update according to the information provided by the developer.

Products Affected

CVE-2021-20852, CVE-2021-20853, CVE-2021-20854, CVE-2021-20855, CVE-2021-20856

• WRH-733GBK firmware v1.02.9 and earlier

• WRH-733GWH firmware v1.02.9 and earlier
  CVE-2021-20857, CVE-2021-20858

• WRC-2533GHBK-I firmware v1.20 and earlier
  CVE-2021-20859, CVE-2021-20860, CVE-2021-20861, CVE-2022-25915

• WRC-1167GST2 firmware v1.25 and earlier

• WRC-1167GST2A firmware v1.25 and earlier

• WRC-1167GST2H firmware v1.25 and earlier

• WRC-2533GS2-B firmware v1.52 and earlier

• WRC-2533GS2-W firmware v1.52 and earlier

• WRC-1750GS firmware v1.03 and earlier

• WRC-1750GSV firmware v2.11 and earlier

• WRC-1900GST firmware v1.03 and earlier

• WRC-2533GST firmware v1.03 and earlier

• WRC-2533GSTA firmware v1.03 and earlier

• WRC-2533GST2 firmware v1.25 and earlier

• WRC-2533GST2SP firmware v1.25 and earlier

• WRC-2533GST2-G firmware v1.25 and earlier

• EDWRC-2533GST2 firmware v1.25 and earlier

• WRC-1167GS2-B firmware v1.65 and earlier

• WRC-1167GS2H-B firmware v1.65 and earlier

• WMC-DLGST2-W firmware v1.24 and earlier

• WMC-M1267GST2-W firmware v1.24 and earlier

• WMC-2HC-W firmware v1.24 and earlier

• WMC-C2533GST-W firmware v1.24 and earlier

• WRC-1900GST2 firmware v1.15 and earlier

• WRC-1900GST2SP firmware v1.15 and earlier

• WRC-1750GST2 firmware v1.14 and earlier