CVE-2023-28831

Name: CVE-2023-28831
Creator: NVD / NIST
Published: 2023-09-12T10:15:27.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2023-28831 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.

Metrics

CVSS 3.1

7.5/10

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

CVSS 4.0

8.7/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.82%

52.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Simatic Cloud Connect 7 Cc712 Firmware	< 2.2
Siemens	Simatic Cloud Connect 7 Cc716 Firmware	< 2.2
Siemens	Simatic Drive Controller Cpu 1504d Tf Firmware	< 2.2
Siemens	Simatic Drive Controller Cpu 1507d Tf Firmware	< 2.9.7
Siemens	Simatic Et 200sp Open Controller Cpu Firmware	< 2.9.7
Siemens	Simatic S7-1200 Cpu Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1510sp-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1510sp F-1 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1511-1 Pn Firmware	< 21.9.7
Siemens	Simatic S7-1500 Cpu 1511c-1 Pn Firmware	< 30.0.0
Siemens	Simatic S7-1500 Cpu 1511f-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1511t-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1511tf-1 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1512c-1 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1512sp-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1512sp F-1 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1513-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1513f-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1513r-1 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1514sp-2 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1514sp F-2 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1514spt-2 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1514spt F-2 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1515-2 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1515f-2 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1515r-2 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1515t-2 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1515tf-2 Pn Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1516-3 Pn\/Dp Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1516f-3 Pn\/Dp Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1516t-3 Pn\/Dp Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1516tf-3 Pn\/Dp Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1517-3 Pn\/Dp Firmware	< 3.0.3
Siemens	Simatic S7-1500 Cpu 1517f-3 Pn\/Dp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1517h-3 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1517t-3 Pn\/Dp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1517tf-3 Pn\/Dp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1518-4 Pn\/Dp Firmware	< 21.9.7
Siemens	Simatic S7-1500 Cpu 1518-4 Pn\/Dp Mfp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1518f-4 Pn\/Dp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1518f-4 Pn\/Dp Mfp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1518hf-4 Pn Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1518t-4 Pn\/Dp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu 1518tf-4 Pn\/Dp Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu S7-1518-4 Pn\/Dp Odk Firmware	< 2.9.7
Siemens	Simatic S7-1500 Cpu S7-1518f-4 Pn\/Dp Odk Firmware	< 2.9.7
Siemens	Simatic S7-1500 Et 200pro Firmware	< 2.9.7
Siemens	Simatic S7-1500 Software Controller Firmware	< 2.9.7
Siemens	Simatic S7-Plcsim Advanced Firmware	< 2.9.7
Siemens	Siplus Et 200sp Cpu 1510sp-1 Pn Firmware	< 2.9.7

Showing 50 of 78 affected configurations. See NVD for the full list.

References

https://cert-portal.siemens.com/productcert/html/ssa-118850.htmlMitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-711309.htmlMitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdfMitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-118850.htmlMitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-711309.htmlMitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdfMitigation, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdfVendor Advisory

Timeline

Published: Sep 12, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28831?

How severe is CVE-2023-28831?

CVE-2023-28831 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28831?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-28831?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST