Vulnerability · Published Feb 9, 2021 · Assigned by ABB

CVE-2020-24685AC500 V2 unauthenticated crafter packet vulnerability

High 8.6

In plain English

A high-severity security flaw in AC500 V2 products with onboard Ethernet from ABB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities).

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)1.6%top 23.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An unauthenticated specially crafted packet sent by an attacker over the network will cause a denial-of-service (DoS) vulnerability. Vulnerability allows attacker to stop the PLC. After stopping (ERR LED flashing red), physical access to the PLC is required in order to restart the application. This issue affects: ABB AC500 V2 products with onboard Ethernet version 2.8.4 and prior versions.

Affected products (as reported)

Vendor	Product	Versions
ABB	AC500 V2 products with onboard Ethernet	version 2.8.4 and prior versions

Weakness: CWE-789 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References

https://search.abb.com/library/Download.aspx?DocumentID=3ADR010667&LanguageCode=en&DocumentPartId=&Action=Launch x_refsource_CONFIRM