CVE-2025-27458

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.

Reserved 2025-02-26 | Published 2025-07-03 | Updated 2025-07-03 | Assigner SICK AG

Problem types

CWE-327 Use of a Broken or Risky Cryptographic Algorithm

Product status

Default status
affected

vers:all/*
affected

References

www.endress.com

sick.com/psirt

www.cisa.gov/...es-tools/resources/ics-recommended-practices

www.first.org/cvss/calculator/3.1

www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json

sick.com/psirt vendor-advisory

www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf vendor-advisory

cve.org (CVE-2025-27458)

nvd.nist.gov (CVE-2025-27458)

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