CVE-2023-46156: siemens simatic drive controller cpu 1504d tf Use After Free

Vulnerability summary

CVE-2023-46156 is a high (CVSS 7.5) Use After Free vulnerability in siemens simatic drive controller cpu 1504d tf. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.7% of scored vulnerabilities.

Timeline

1. 12-12-2023
   PublishedVulnerability first disclosed.
2. 25-02-2026
   Last modifiedVulnerability information updated.

Description

Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a denial of service condition. A restart is needed to restore normal operations.

• CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.