Vulnerability identifier: #VU27363

Vulnerability risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8479

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ABB Central Licensing System (CLS)
Server applications / Other server solutions

Vendor: ABB

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or block license handling.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

This vulnerability affects the following ABB CLS products:

• ABB Ability System 800xA and related system extensions: Versions 5.1, 6.0, 6.1
• Compact HMI: Versions 5.1, 6.0
• Control Builder Safe: Versions 1.0, 1.1, 2.0
• ABB Ability Symphony Plus – S+ Operations: Versions 3.0 to 3.2
• ABB Ability Symphony Plus – S+ Engineering: Versions 1.1 to 2.2
• Composer Harmony: Versions 5.1, 6.0, 6.1
• Composer Melody (incl. SPE for Melody 1.0 SPx): Versions 5.3, 6.1, 6.2, 6.3
• Harmony OPC Server (HAOPC): Standalone Versions 6.0, 6.1, 7.0
• ABB Ability System 800xA / Advant OCS Control Builder A: Versions 1.3, 1.4
• Advant OCS AC 100 OPC Server: Versions 5.1, 6.0, 6.1
• Composer CTK: Versions 6.1, 6.2
• AdvaBuild: Versions 3.7 SP1, 3.7 SP2
• OPC Server MOD 300 (non-800xA): Version 1.4
• OPC Data Link: Versions 2.1, 2.2
• ABB Ability Knowledge Manager: Versions 8.0, 9.0, 9.1
• ABB Ability Manufacturing Operations Management: Versions 1812, 1909

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ABB Central Licensing System (CLS): All versions

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External links
http://applied-risk.com/assets/uploads/whitepapers/AR2020002-ABB-800xA-MultipleVulnerabilities.pdf
http://search.abb.com/library/Download.aspx?DocumentID=2PAA121230&LanguageCode=en&DocumentPartId=&Action=Launch
http://search.abb.com/library/Download.aspx?DocumentID=2PAA121231&LanguageCode=en&DocumentPartId=&Action=Launch

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.