Remote code execution in Siemens SIMATIC S7-1200 and S7-1500 CPU Families

1) Buffer overflow

EUVDB-ID: #VU53663

Risk: High

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

CVE-ID: CVE-2020-15782

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SIMATIC ET 200SP Open Controller CPU 1515SP PC2: All versions

SIMATIC ET 200SP Open Controller CPU 1515SP PC: All versions

SIMATIC S7-1500 Software Controller: All versions

SIMATIC S7-1200: before 4.5.0

SIMATIC S7-1500 CPU: before 2.9.2

SIMATIC S7-PLCSIM Advanced: before 4.0

SIMATIC Drive Controller: before 2.9.2

External links

http://cert-portal.siemens.com/productcert/pdf/ssa-434534.pdf

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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