Description

The Auto-Maskin products utilize an undocumented custom protocol to set up Modbus communications with other devices without validating those devices. The originating device sends a message in plaintext, 48:65:6c:6c:6f:20:57:6f:72:6c:64, "Hello World" over UDP ports 44444-44446 to the broadcast address for the LAN. Without verification devices respond to any of these broadcast messages on the LAN with a plaintext reply over UDP containing the device model and firmware version. Following this exchange the devices allow Modbus transmissions between the two devices on the standard Modbus port 502 TCP. Impact: An attacker can exploit this vulnerability to send arbitrary messages to any DCU or RP device through spoofing or replay attacks as long as they have access to the network. Affected releases are Auto-Maskin DCU-210E RP-210E: Versions prior to 3.7 on ARMv7.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

CNA:  CERT/CC

Base Score:  9.1 CRITICAL

Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  6.4 MEDIUM

Vector:  (AV:N/AC:L/Au:N/C:P/I:P/A:N)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://www.kb.cert.org/vuls/id/176301	Third Party Advisory  US Government Resource
https://www.us-cert.gov/ics/advisories/icsa-20-051-04

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-346	Origin Validation Error	NIST   CERT/CC

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Change History

3 change records found show changes

CVE Modified by CERT/CC 2/24/2020 10:15:11 AM

Action	Type	Old Value	New Value
Added	Reference		https://www.us-cert.gov/ics/advisories/icsa-20-051-04 [No Types Assigned]

CVE Modified by CERT/CC 10/09/2019 7:41:17 PM

Action	Type	Old Value	New Value
Added	CVSS V3		CERT/CC AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Added	CWE		CERT/CC CWE-346

Initial Analysis by NIST 1/24/2019 9:30:18 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		AND OR *cpe:2.3:o:auto-maskin:dcu_210e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:arm7:*:*:*:*:*:*:*:* versions up to (excluding) 3.7 cpe:2.3:h:auto-maskin:dcu_210e:-:*:*:*:*:*:*:*
Added	CPE Configuration		AND OR *cpe:2.3:o:auto-maskin:rp_210e_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:arm7:*:*:*:*:*:*:*:* versions up to (excluding) 3.7 cpe:2.3:h:auto-maskin:rp_210e:-:*:*:*:*:*:*:*
Added	CVSS V2		(AV:N/AC:L/Au:N/C:P/I:P/A:N)
Added	CVSS V3		AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Added	CWE		CWE-346
Changed	Reference Type	https://www.kb.cert.org/vuls/id/176301 No Types Assigned	https://www.kb.cert.org/vuls/id/176301 Third Party Advisory, US Government Resource