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.
CVE ID: CVE-2023-28831
CVSS Base Severity: HIGH
CVSS Base Score: 7.5
Vendor: Siemens
Product: SIMATIC BRAUMAT
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 24.15% (scored less or equal to compared to others)
EPSS Date: 2025-02-03 (when was this score calculated)