#VU54868 Improper Certificate Validation in Siemens products - CVE-2021-31892

Vulnerability identifier: #VU54868

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-31892

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SINUMERIK Analyze MyConditionSINUMERIK Analyze MyPerformance
Hardware solutions / Firmware
SINUMERIK Analyze MyPerformance / OEE-Monitor
Hardware solutions / Firmware
SINUMERIK Analyze MyPerformance / OEE-Tuning
Hardware solutions / Firmware
SINUMERIK Integrate for Production
Hardware solutions / Firmware
SINUMERIK Manage MyMachines
Hardware solutions / Firmware
SINUMERIK Manage MyMachines / Remote
Hardware solutions / Firmware
SINUMERIK Manage MyMachines / Spindel Monitor
Hardware solutions / Firmware
SINUMERIK Manage MyPrograms
Hardware solutions / Firmware
SINUMERIK Manage MyResources / Programs
Hardware solutions / Firmware
SINUMERIK Manage MyResources / Tools
Hardware solutions / Firmware
SINUMERIK Manage My Tools
Hardware solutions / Firmware
SINUMERIK Optimize MyProgramming / NX-Cam Editor
Hardware solutions / Firmware
SINUMERIK Integrate Client 02
Hardware solutions / Firmware
SINUMERIK Integrate Client 03
Hardware solutions / Firmware
SINUMERIK Integrate Client 04
Hardware solutions / Firmware
SINUMERIK Operate
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an error in a third-party dependency, the SSL flags used for setting up a TLS connection to a server are overwritten with wrong settings. A remote attacker can perform a man-in-the-middle (MitM) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SINUMERIK Analyze MyConditionSINUMERIK Analyze MyPerformance: All versions

SINUMERIK Analyze MyPerformance / OEE-Monitor: All versions

SINUMERIK Analyze MyPerformance / OEE-Tuning: All versions

SINUMERIK Integrate for Production: All versions

SINUMERIK Manage MyMachines: All versions

SINUMERIK Manage MyMachines / Remote: All versions

SINUMERIK Manage MyMachines / Spindel Monitor: All versions

SINUMERIK Manage MyPrograms: All versions

SINUMERIK Manage MyResources / Programs: All versions

SINUMERIK Manage MyResources / Tools: All versions

SINUMERIK Manage My Tools: All versions

SINUMERIK Operate: 4.8 - 4.94

SINUMERIK Optimize MyProgramming / NX-Cam Editor: All versions

SINUMERIK Integrate Client 02: before 02.00.18

SINUMERIK Integrate Client 03: before 03.00.18

SINUMERIK Integrate Client 04: before 04.00.18

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-729965.pdf

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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.