Vulnerability identifier: #VU53229

Vulnerability risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-0591

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
Hardware solutions / Firmware
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Hardware solutions / Firmware

Vendor: Siemens

Description

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

The vulnerability exists due to a boundary error in BIOS firmware for some Intel Processors. A local administrator can trigger memory corruption and execute arbitrary code on the target system with elevated privileges.

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

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: All versions

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: All versions

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External links
http://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00358
http://security.netapp.com/advisory/ntap-20201113-0001/
http://cert-portal.siemens.com/productcert/pdf/ssa-501073.pdf

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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.