CVE-2025-27458 Information

Description

The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted an attacker can obtain the challenge and response and try to derive the password from this information.

Reference

https://sick.com/psirt https://sick.com/psirt https://www.cisa.gov/resources-tools/resources/ics-recommended-practices https://www.endress.com https://www.first.org/cvss/calculator/3.1 https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf

Related CNNVD

CNNVD-202507-277 (Published: 2025-07-03)