Script realvnc-auth-bypass

Script types: portrule
Categories: auth, safe, vuln
Download: https://svn.nmap.org/nmap/scripts/realvnc-auth-bypass.nse

Script Summary

Checks if a VNC server is vulnerable to the RealVNC authentication bypass (CVE-2006-2369).

See also:

Script Arguments

vulns.short, vulns.showall

See the documentation for the vulns library.

Example Usage

nmap -sV --script=realvnc-auth-bypass <target>

Script Output 

PORT     STATE SERVICE VERSION
5900/tcp open  vnc     VNC (protocol 3.8)
| realvnc-auth-bypass:
|   VULNERABLE:
|   RealVNC 4.1.0 - 4.1.1 Authentication Bypass
|     State: VULNERABLE
|     IDs:  CVE:CVE-2006-2369
|     Risk factor: High  CVSSv2: 7.5 (HIGH) (AV:N/AC:L/Au:N/C:P/I:P/A:P)
|       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.
|     Disclosure date: 2006-05-08
|     References:
|       http://www.intelliadmin.com/index.php/2006/05/security-flaw-in-realvnc-411/
|_      https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2369

Requires

Author:

  • Brandon Enright

License: Same as Nmap--See https://nmap.org/book/man-legal.html