PT-2021-11065 · Abb · Ac500

Published 2021-02-09 · Updated 2021-02-16 · CVE-2020-24685

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: ABB AC500 V2 products with onboard Ethernet versions prior to 2.8.4

Description: The issue is caused by an unauthenticated specially crafted packet sent over the network, resulting in a denial-of-service (DoS) condition. This allows an attacker to stop the PLC, requiring physical access to restart the application after it has stopped, indicated by the ERR LED flashing red.

Recommendations: For versions prior to 2.8.4, update to version 2.8.4 or later to resolve the issue.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-789

CWE-770

Related Identifiers

CVE-2020-24685

Affected Products

Ac500

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2020-24685 · Security Note
• https://osv.dev/vulnerability/CVE-2020-24685 · Vendor Advisory
• https://search.abb.com/library/Download.aspx?DocumentID=3ADR010667&LanguageCode=en&DocumentPartId=&Action=Launch · Vendor Advisory
• https://t.me/cvenotify/9634 · Telegram Post