Published:2024/09/24  Last Updated:2024/09/24

JVN#78356367
Multiple NTT EAST Home GateWay/Hikari Denwa routers fail to restrict access permissions

Overview

Multiple Home GateWay/Hikari Denwa routers provided by NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION (NTT EAST) fail to restrict access permissions.

Products Affected

  • Hikari Denwa router RT-400MI Ver.09.00.0015 and earlier
  • Hikari Denwa router PR-400MI Ver.09.00.0015 and earlier
  • Hikari Denwa router RV-440MI Ver.09.00.0015 and earlier
  • Home GateWay/Hikari Denwa router PR-500MI/RS-500MI/RT-500MI Ver.08.00.0004 and earlier
  • Home GateWay/Hikari Denwa router PR-600MI/RX-600MI Ver.01.00.0008 and earlier

Note that, above products are also provided by NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION (NTT WEST), but the vulnerability only affects products subscribed and used in NTT EAST areas.

Description

Multiple Home GateWay/Hikari Denwa routers provided by NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION fail to restrict access permissions (CWE-451).

Impact

An attacker who identified WAN-side IPv6 address may access the product's Device Setting page via WAN-side.

Solution

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

Vendor Status

Vendor Status Last Update Vendor Notes
NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION Vulnerable 2024/09/24

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score: 5.3
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)

Comment

Assuming an attack scenario where an attacker can access the product's Device Setting page via WAN-side, "Confidentiality (C)" is assessed as the primary impact, and "Integrity (I)" and "Availability (A)" are assessed as secondary.

Credit

Keishi Awata of logicalmixed reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2024-47044
JVN iPedia JVNDB-2024-000102