#VU28999 Incorrect permission assignment for critical resource in RSLinx Classic - CVE-2020-10642

Vulnerability identifier: #VU28999

Vulnerability risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2020-10642

CWE-ID: CWE-732

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
RSLinx Classic
Server applications / SCADA systems

Vendor: Rockwell Automation

Description

The vulnerability allows a local user to execute arbitrary code on the system.

The vulnerability exists due to insecure permissions. A local user can modify a registry key and execute arbitrary code using system privileges when opening RSLinx Classic. 

Mitigation
Vendor recommends to apply patch 1091155 for versions 3.60 to 4.11.

Vulnerable software versions

RSLinx Classic: 4.11.00

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External links
https://www.us-cert.gov/ics/advisories/icsa-20-100-01

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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.