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

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CVE-2021-20591

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
11/06/2021
Last modified:
22/06/2021

Description

Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R00/01/02CPU all versions, R04/08/16/32/120(EN)CPU all versions, R08/16/32/120SFCPU all versions, R08/16/32/120PCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to prevent legitimate clients from connecting to the MELSOFT transmission port (TCP/IP) by not closing a connection properly, which may lead to a denial of service (DoS) condition.

Impact

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

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

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

Base Score 2.0
7.80
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:mitsubishielectric:r00cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r00cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r01cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r01cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r02cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r02cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r04cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r04cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r08cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r08cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r16cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r16cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r32cpu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:mitsubishielectric:r32cpu:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishielectric:r120cpu_firmware:*:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools