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    CVE-2006-2369

    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:May 15, 2006
    Last Modified:Apr 16, 2026
    EPS:May 15, 2006
    EPSS Score:0.92499
    CVSS Score:7.5

    Affected Products

    Vendor
    Vnc
    Product
    Realvnc

    Exploits

    http://securitytracker.com/id?1016083http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.htmlhttp://www.securityfocus.com/bid/17978http://securitytracker.com/id?1016083http://www.intelliadmin.com/blog/2006/05/vnc-flaw-proof-of-concept.htmlhttp://www.securityfocus.com/bid/17978https://www.exploit-db.com/exploits/1791https://github.com/hacker1337itme/CVE-2006-2369https://www.exploit-db.com/exploits/17719https://www.exploit-db.com/exploits/1794https://www.exploit-db.com/exploits/36932

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    References

    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
    http://secunia.com/advisories/20109
    http://secunia.com/advisories/20789
    http://securityreason.com/securityalert/8355
    http://securitytracker.com/id?1016083
    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
    http://www.kb.cert.org/vuls/id/117929
    http://www.osvdb.org/25479
    http://www.realvnc.com/products/free/4.1/release-notes.html
    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
    http://www.vupen.com/english/advisories/2006/1790
    http://www.vupen.com/english/advisories/2006/1821
    http://www.vupen.com/english/advisories/2006/2492
    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
    http://secunia.com/advisories/20109
    http://secunia.com/advisories/20789
    http://securityreason.com/securityalert/8355
    http://securitytracker.com/id?1016083
    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
    http://www.kb.cert.org/vuls/id/117929
    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
    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
    http://www.vupen.com/english/advisories/2006/1790
    http://www.vupen.com/english/advisories/2006/1821
    http://www.vupen.com/english/advisories/2006/2492
    https://exchange.xforce.ibmcloud.com/vulnerabilities/26445

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High