CVE Catalog

CVE-2006-2206

High
Published: Translated: NVD NIST

Summary

The MS-Logon authentication scheme in UltraVNC 1.0.1 uses weak XOR encryption for challenge/response, allowing remote attackers to sniff and decrypt passwords.

Risk Assessment

An attacker can gain unauthorized access to systems managed by UltraVNC, leading to remote control takeover and potential data breach.

Recommendation

Upgrade UltraVNC to a version newer than 1.0.1 with fixed encryption, or use a VPN tunnel for secure VNC traffic.

Related vulnerabilities

Original NVD description (English source)

The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR) for challenge/response, which allows remote attackers to gain privileges by sniffing and decrypting passwords.

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