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Last updated: 7/6/2015 8:15:39 PM

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Vulnerability Summary for CVE-2006-2369

Original release date: 05/15/2006
Last revised: 09/22/2011


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.5 (HIGH) (AV:N/AC:L/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (08/16/2006)
This issue only affected version 4.1.1 and not the versions distributed with Red Hat Enterprise Linux 2.1, 3, or 4.

References to Advisories, Solutions, and Tools

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External Source: VUPEN
Name: ADV-2006-2492
Type: Advisory
External Source: FULLDISC
Name: 20060515 RealVNC 4.1.1 Remote Compromise
US-CERT Vulnerability Note: CERT-VN
Name: VU#117929
Type: Advisory; Patch Information
External Source: MISC
Name: http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html
External Source: BUGTRAQ
Name: 20060623 Linux VNC evil client patch - BID 17978
External Source: BUGTRAQ
Name: 20060516 re: RealVNC 4.1.1 Remote Compromise
External Source: XF
Name: realvnc-auth-bypass(26445)
External Source: SECTRACK
Name: 1016083
Type: Patch Information; Exploit
External Source: MISC
Name: http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.html
Type: Patch Information; Exploit
External Source: MLIST
Name: [vnc-list] 20060513 Version 4.1.2
External Source: BID
Name: 17978
Type: Patch Information; Exploit
External Source: BUGTRAQ
Name: 20060515 RealVNC 4.1.1 Remote Compromise
External Source: BUGTRAQ
Name: 20060520 Re: [Full-disclosure] RealVNC 4.1.1 Remote Compromise
External Source: BUGTRAQ
Name: 20060515 Re: [Full-disclosure] RealVNC 4.1.1 Remote Compromise
Type: Patch Information
External Source: VUPEN
Name: ADV-2006-1821
Type: Advisory
External Source: CISCO
Name: 20060622 RealVNC Remote Authentication Bypass Vulnerability
External Source: VUPEN
Name: ADV-2006-1790
Type: Advisory
External Source: SREASON
Name: 8355
External Source: OSVDB
Name: 25479
External Source: BUGTRAQ
Name: 20060518 RE: [Full-disclosure] RealVNC 4.1.1 Remote Compromise
External Source: CONFIRM
Name: http://www.realvnc.com/products/free/4.1/release-notes.html
Type: Patch Information
External Source: BUGTRAQ
Name: 20060624 Re: Linux VNC evil client patch - BID 17978

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:vnc:realvnc:4.1.1

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)