Vulnerability identifier: #VU27360

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8471

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

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

Vendor: ABB

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to weak file permissions. A local user can modify the system-wide configuration and gain elevated privileges on the target system, or generate denialof-service effects through file deletion or modification.

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?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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