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

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CVE-2020-24686

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
26/02/2021
Last modified:
05/03/2021

Description

The vulnerabilities can be exploited to cause the web visualization component of the PLC to stop and not respond, leading to genuine users losing remote visibility of the PLC state. If a user attempts to login to the PLC while this vulnerability is exploited, the PLC will show an error state and refuse connections to Automation Builder. The execution of the PLC application is not affected by this vulnerability. This issue affects ABB AC500 V2 products with onboard Ethernet.

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:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

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

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:abb:pm554_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:abb:pm554:-:*:*:*:*:*:*:*
cpe:2.3:o:abb:pm556_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:abb:pm556:-:*:*:*:*:*:*:*
cpe:2.3:o:abb:pm564_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:abb:pm564:-:*:*:*:*:*:*:*
cpe:2.3:o:abb:pm566_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:abb:pm566:-:*:*:*:*:*:*:*
cpe:2.3:o:abb:pm572_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:abb:pm572:-:*:*:*:*:*:*:*
cpe:2.3:o:abb:pm573_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:abb:pm573:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools