CVE-2021-40142 — HIGH (7.5)

Q: How severe is CVE-2021-40142?

CVE-2021-40142 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-40142?

Check the references section above for vendor advisories and patch information. Affected products include: Opcfoundation Local Discover Server, Siemens Simatic Process Historian Opc Ua Server Firmware, Siemens Simatic Process Historian Opc Ua Server, Siemens Simatic Net Pc, Siemens Simatic Wincc.

Vulnerability Description

In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Opcfoundation	Local Discover Server	< 1.04.402.463
Siemens	Simatic Process Historian Opc Ua Server Firmware	< 2022
Siemens	Simatic Process Historian Opc Ua Server	-
Siemens	Simatic Net Pc	14
Siemens	Simatic Wincc	-
Siemens	Simatic Wincc Runtime	-
Siemens	Simatic Wincc Unified Scada Runtime	-
Siemens	Telecontrol Server Basic	3.0

Related Weaknesses (CWE)

CWE-119

References

https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdfPatchThird Party Advisory
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20PatchVendor Advisory
https://opcfoundation.org/security-bulletins/Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdfPatchThird Party Advisory
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20PatchVendor Advisory
https://opcfoundation.org/security-bulletins/Vendor Advisory

FAQ

What is CVE-2021-40142?

CVE-2021-40142 is a vulnerability with a CVSS score of 7.5 (HIGH). In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location ...

How severe is CVE-2021-40142?

CVE-2021-40142 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40142?

Check the references section above for vendor advisories and patch information. Affected products include: Opcfoundation Local Discover Server, Siemens Simatic Process Historian Opc Ua Server Firmware, Siemens Simatic Process Historian Opc Ua Server, Siemens Simatic Net Pc, Siemens Simatic Wincc.