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.
Published 2006-05-15 16:06:00
Updated 2022-05-13 18:15:08
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Exploit prediction scoring system (EPSS) score for CVE-2006-2369

97.20%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2006-2369

  • RealVNC NULL Authentication Mode Bypass
    Disclosure Date: 2006-05-15
    First seen: 2020-04-26
    auxiliary/admin/vnc/realvnc_41_bypass
    This module exploits an Authentication bypass Vulnerability in RealVNC Server version 4.1.0 and 4.1.1. It sets up a proxy listener on LPORT and proxies to the target server The AUTOVNC option requires that vncviewer be installed on the attacking machine.
  • VNC Authentication None Detection
    First seen: 2020-04-26
    auxiliary/scanner/vnc/vnc_none_auth
    Detect VNC servers that support the "None" authentication method. Authors: - Matteo Cantoni <goony@nothink.org> - jduck <jduck@metasploit.com>

CVSS scores for CVE-2006-2369

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST

CWE ids for CVE-2006-2369

  • When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
    Assigned by: nvd@nist.gov (Primary)

Vendor statements for CVE-2006-2369

  • Red Hat 2006-08-16
    This issue only affected version 4.1.1 and not the versions distributed with Red Hat Enterprise Linux 2.1, 3, or 4.

References for CVE-2006-2369

Products affected by CVE-2006-2369

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