Remote code execution in Siemens SIMATIC Software Products



Published: 2021-07-14
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-31893
CWE-ID CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
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SIMATIC PCS 7
Server applications / SCADA systems

SIMATIC PDM
Server applications / SCADA systems

SIMATIC STEP 7
Server applications / SCADA systems

SINAMICS STARTER
Other software / Other software solutions

Vendor Siemens

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU54869

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-31893

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 when processing certain files. A remote authenticated 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 PCS 7: 8.2 - 9.0

SIMATIC PDM: before 9.2

SIMATIC STEP 7: before 5.6 SP2 HF3

SINAMICS STARTER: before 5.4 HF2


CPE2.3 External links

http://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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