CVE-2023-3825: kepware kepserverex Uncontrolled Resource Consumption

Vulnerability summary

CVE-2023-3825 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in kepware kepserverex. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.6% of scored vulnerabilities.

Timeline

1. 31-07-2023
   PublishedVulnerability first disclosed.
2. 21-10-2024
   Last modifiedVulnerability information updated.

Description

PTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.

• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.