CVE-2020-8475 ABB Central Licensing System - Denial of Service Vulnerability
An attacker can block license handling in ABB Central Licensing Server by sending specially crafted messages, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-8475?
CVE-2020-8475 is a medium-severity denial of service vulnerability in ABB Ability™ SCADAvantage, published on 29 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
For the Central Licensing Server component used in ABB products ABB Ability™ System 800xA and related system extensions versions 5.1, 6.0 and 6.1, Compact HMI versions 5.1 and 6.0, Control Builder Safe 1.0, 1.1 and 2.0, Symphony Plus -S+ Operations 3.0 to 3.2 Symphony Plus -S+ Engineering 1.1 to 2.2, Composer Harmony 5.1, 6.0 and 6.1, Melody Composer 5.3, 6.1/6.2 and SPE for Melody 1.0SPx (Composer 6.3), Harmony OPC Server (HAOPC) Standalone 6.0, 6.1 and 7.0, ABB Ability™ System 800xA/ Advant® OCS Control Builder A 1.3 and 1.4, Advant® OCS AC100 OPC Server 5.1, 6.0 and 6.1, Composer CTK 6.1 and 6.2, AdvaBuild 3.7 SP1 and SP2, OPCServer for MOD 300 (non-800xA) 1.4, OPC Data Link 2.1 and 2.2, Knowledge Manager 8.0, 9.0 and 9.1, Manufacturing Operations Management 1812 and 1909, ABB AbilityTM SCADAvantage versions 5.1 to 5.6.5, a weakness in validation of input exists that allows an attacker to block license handling by sending specially crafted messages to the CLS web service.
Weakness: CWE-20
Which versions are affected by CVE-2020-8475?
It affects 3 products.
Products include Abb 800xa System, Abb Compact Hmi, Abb Control Builder Safe.
How do I fix CVE-2020-8475?
No fix has been published for CVE-2020-8475 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-8475 being exploited?
There is no known exploitation of CVE-2020-8475 in the wild and no public exploit code.
Other vulnerabilities in ABB Ability™ SCADAvantage
Sources
Also known as GHSA-wfh9-g9j2-x793.