CVE Catalog

CVE-2006-2369

High
Published: Translated: NVD NIST

Summary

RealVNC 4.1.1 and other products using it (e.g., AdderLink IP, Cisco CallManager) allow a remote attacker to bypass authentication by sending a request with an insecure security type ("Type 1 - None"), which is accepted even if not offered by the server. The attack was originally demonstrated using a long password.

Risk Assessment

An attacker can gain unauthorized access to the remote desktop, leading to system compromise, data theft, or further privilege escalation within the organization's network.

Recommendation

Immediately upgrade RealVNC to a version later than 4.1.1 that fixes this vulnerability, or apply a workaround by enforcing secure authentication types on the server side.

Related vulnerabilities

Original NVD description (English source)

RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS