7.5
HIGH CVSS 2.0
CVE-2006-2369
RealVNC Authentication Bypass Vulnerability
Description

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.

INFO

Published Date :

May 15, 2006, 4:06 p.m.

Last Modified :

April 3, 2025, 1:03 a.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2006-2369 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Realvnc realvnc
1 Vnc realvnc
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
Solution
To address the authentication bypass vulnerability, update the affected VNC software.
  • Upgrade to RealVNC Free Edition 4.1.2, Personal Edition 4.2.3, Enterprise Edition 4.2.3, or later.
  • If using LibVNCServer, upgrade to version 0.8.2 or later.
Public PoC/Exploit Available at Github

CVE-2006-2369 has a 8 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2006-2369.

URL Resource
http://marc.info/?l=full-disclosure&m=114768344111131&w=2
http://marc.info/?l=vnc-list&m=114755444130188&w=2
http://seclists.org/fulldisclosure/2022/May/29
http://secunia.com/advisories/20107 Patch Vendor Advisory
http://secunia.com/advisories/20109 Patch Vendor Advisory
http://secunia.com/advisories/20789 Vendor Advisory
http://securityreason.com/securityalert/8355
http://securitytracker.com/id?1016083 Exploit Patch
http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml
http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html
http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html Exploit Patch
http://www.kb.cert.org/vuls/id/117929 Patch Third Party Advisory US Government Resource
http://www.osvdb.org/25479
http://www.realvnc.com/products/free/4.1/release-notes.html Patch
http://www.securityfocus.com/archive/1/433994/100/0/threaded
http://www.securityfocus.com/archive/1/434015/100/0/threaded
http://www.securityfocus.com/archive/1/434117/100/0/threaded
http://www.securityfocus.com/archive/1/434518/100/0/threaded
http://www.securityfocus.com/archive/1/434560/100/0/threaded
http://www.securityfocus.com/archive/1/438175/100/0/threaded
http://www.securityfocus.com/archive/1/438368/100/0/threaded
http://www.securityfocus.com/bid/17978 Exploit Patch
http://www.vupen.com/english/advisories/2006/1790 Vendor Advisory
http://www.vupen.com/english/advisories/2006/1821 Vendor Advisory
http://www.vupen.com/english/advisories/2006/2492 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/26445
http://marc.info/?l=full-disclosure&m=114768344111131&w=2
http://marc.info/?l=vnc-list&m=114755444130188&w=2
http://seclists.org/fulldisclosure/2022/May/29
http://secunia.com/advisories/20107 Patch Vendor Advisory
http://secunia.com/advisories/20109 Patch Vendor Advisory
http://secunia.com/advisories/20789 Vendor Advisory
http://securityreason.com/securityalert/8355
http://securitytracker.com/id?1016083 Exploit Patch
http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml
http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html
http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html Exploit Patch
http://www.kb.cert.org/vuls/id/117929 Patch Third Party Advisory US Government Resource
http://www.openwall.com/lists/oss-security/2024/08/02/8
http://www.osvdb.org/25479
http://www.realvnc.com/products/free/4.1/release-notes.html Patch
http://www.securityfocus.com/archive/1/433994/100/0/threaded
http://www.securityfocus.com/archive/1/434015/100/0/threaded
http://www.securityfocus.com/archive/1/434117/100/0/threaded
http://www.securityfocus.com/archive/1/434518/100/0/threaded
http://www.securityfocus.com/archive/1/434560/100/0/threaded
http://www.securityfocus.com/archive/1/438175/100/0/threaded
http://www.securityfocus.com/archive/1/438368/100/0/threaded
http://www.securityfocus.com/bid/17978 Exploit Patch
http://www.vupen.com/english/advisories/2006/1790 Vendor Advisory
http://www.vupen.com/english/advisories/2006/1821 Vendor Advisory
http://www.vupen.com/english/advisories/2006/2492 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/26445
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2006-2369 is associated with the following CWEs:

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

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Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2006-2369 vulnerability anywhere in the article.

  • Cybersecurity News
CVE-2024-42458 (CVSS 9.8) – New Security Vulnerability in Neat VNC: Urgent Patch Released

Neat VNC, a popular open-source VNC server library used for remote desktop access and screen sharing, has been found vulnerable to a security vulnerability (CVE-2024-42458, CVSS 9.8). This flaw could ... Read more

Published Date: Aug 09, 2024 (1 year ago)

The following table lists the changes that have been made to the CVE-2006-2369 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://marc.info/?l=full-disclosure&m=114768344111131&w=2
    Added Reference http://marc.info/?l=vnc-list&m=114755444130188&w=2
    Added Reference http://seclists.org/fulldisclosure/2022/May/29
    Added Reference http://secunia.com/advisories/20107
    Added Reference http://secunia.com/advisories/20109
    Added Reference http://secunia.com/advisories/20789
    Added Reference http://securityreason.com/securityalert/8355
    Added Reference http://securitytracker.com/id?1016083
    Added Reference http://www.cisco.com/warp/public/707/cisco-sr-20060622-cmm.shtml
    Added Reference http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html
    Added Reference http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html
    Added Reference http://www.kb.cert.org/vuls/id/117929
    Added Reference http://www.openwall.com/lists/oss-security/2024/08/02/8
    Added Reference http://www.osvdb.org/25479
    Added Reference http://www.realvnc.com/products/free/4.1/release-notes.html
    Added Reference http://www.securityfocus.com/archive/1/433994/100/0/threaded
    Added Reference http://www.securityfocus.com/archive/1/434015/100/0/threaded
    Added Reference http://www.securityfocus.com/archive/1/434117/100/0/threaded
    Added Reference http://www.securityfocus.com/archive/1/434518/100/0/threaded
    Added Reference http://www.securityfocus.com/archive/1/434560/100/0/threaded
    Added Reference http://www.securityfocus.com/archive/1/438175/100/0/threaded
    Added Reference http://www.securityfocus.com/archive/1/438368/100/0/threaded
    Added Reference http://www.securityfocus.com/bid/17978
    Added Reference http://www.vupen.com/english/advisories/2006/1790
    Added Reference http://www.vupen.com/english/advisories/2006/1821
    Added Reference http://www.vupen.com/english/advisories/2006/2492
    Added Reference https://exchange.xforce.ibmcloud.com/vulnerabilities/26445
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 13, 2022

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2022/May/29 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 18, 2018

    Action Type Old Value New Value
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/434518/100/0/threaded [No Types Assigned]
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/438368/100/0/threaded [No Types Assigned]
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/438175/100/0/threaded [No Types Assigned]
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/434117/100/0/threaded [Exploit]
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/434560/100/0/threaded [No Types Assigned]
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/434015/100/0/threaded [Patch]
    Removed Reference http://www.securityfocus.com/archive/1/archive/1/433994/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/438368/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/438175/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/434560/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/434518/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/434117/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/434015/100/0/threaded [No Types Assigned]
    Added Reference http://www.securityfocus.com/archive/1/433994/100/0/threaded [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 20, 2017

    Action Type Old Value New Value
    Removed Reference http://xforce.iss.net/xforce/xfdb/26445 [No Types Assigned]
    Added Reference https://exchange.xforce.ibmcloud.com/vulnerabilities/26445 [No Types Assigned]
  • CVE Translated by [email protected]

    Oct. 20, 2016

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Oct. 18, 2016

    Action Type Old Value New Value
    Removed Reference http://marc.theaimsgroup.com/?l=vnc-list&m=114755444130188&w=2
    Removed Reference http://marc.theaimsgroup.com/?l=full-disclosure&m=114768344111131&w=2
    Added Reference http://marc.info/?l=vnc-list&m=114755444130188&w=2
    Added Reference http://marc.info/?l=full-disclosure&m=114768344111131&w=2
  • Initial Analysis by [email protected]

    May. 16, 2006

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

93.08 }} 0.10%

score

0.99777

percentile