#VU25446 Heap-based buffer overflow in OpenEnterprise - CVE-2020-6970

Vulnerability identifier: #VU25446

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-6970

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenEnterprise
Server applications / SCADA systems

Vendor: Emerson

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing scripts. A remote attacker can use a specially crafted script, trigger heap-based buffer overflow and execute arbitrary code on the OpenEnterprise Server.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: The following versions of OpenEnterprise SCADA Server are affected:

• OpenEnterprise Server 2.83 is affected if Modbus or ROC Interfaces have been installed and are in use
• OpenEnterprise 3.1 through 3.3.3, all versions

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenEnterprise: 3.1 - 3.3.3

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External links
https://ics-cert.us-cert.gov/advisories/icsa-20-049-02
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2020/03/23/klcert-20-003-remote-code-execution-on-emerson-openenterprise-scada-server-version-2-83-and-all-versions-of-openenterprise-3-1-through-3-3-3/

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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.