Vulnerability · Published Nov 13, 2024 · Assigned by schneider
CVE-2024-8935
High 7.5
In plain English
A high-severity authentication bypass by spoofing in Modicon M340 CPU (part numbers BMXP34*) from Schneider Electric. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Official description
CWE-290: Authentication Bypass by Spoofing vulnerability exists that could cause a denial of service and loss of confidentiality and integrity of controllers when conducting a Man-In-The-Middle attack between the controller and the engineering workstation while a valid user is establishing a communication session. This vulnerability is inherent to Diffie Hellman algorithm which does not protect against Man-In-The-Middle attacks.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Schneider Electric | Modicon M340 CPU (part numbers BMXP34*) | All versions since SV3.60 |
| Schneider Electric | Modicon MC80 (part numbers BMKC80) | All versions |
| Schneider Electric | Modicon Momentum Unity M1E Processor (171CBU*) | All Versions |
Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H