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    CVE-2005-2640

    Behavioral discrepancy information leak in Juniper Netscreen VPN running ScreenOS 5.2.0 and earlier, when using IKE with pre-shared key authentication, allows remote attackers to enumerate valid usernames via an IKE Aggressive Mode packet, which generates a response if the username is valid but does not respond when the username is invalid.

    Published:Aug 20, 2005
    Last Modified:Apr 16, 2026
    EPS:Aug 20, 2005
    EPSS Score:0.05881
    CVSS Score:5

    Affected Products

    Vendor
    Juniper
    Product
    Netscreen-5gt
    Vendor
    Juniper
    Product
    Netscreen-idp
    Vendor
    Juniper
    Product
    Netscreen-idp 10
    Vendor
    Juniper
    Product
    Netscreen-idp 100
    Vendor
    Juniper
    Product
    Netscreen-idp 1000
    Vendor
    Juniper
    Product
    Netscreen-idp 500
    Vendor
    Juniper
    Product
    Netscreen Screenos
    Vendor
    Neoteris
    Product
    Instant Virtual Extranet
    Vendor
    Netscreen
    Product
    Netscreen-sa 5000 Series
    Vendor
    Netscreen
    Product
    Netscreen-sa 5020 Series
    Vendor
    Netscreen
    Product
    Netscreen-sa 5050 Series
    Vendor
    Netscreen
    Product
    Ns-10
    Vendor
    Netscreen
    Product
    Ns-100
    Vendor
    Netscreen
    Product
    Ns-204
    Vendor
    Netscreen
    Product
    Ns-500
    Vendor
    Netscreen
    Product
    Ns-50ns25

    Exploits

    http://www.nta-monitor.com/news/vpn-flaws/juniper/netscreen/index.htmhttp://www.securityfocus.com/bid/14595http://www.nta-monitor.com/news/vpn-flaws/juniper/netscreen/index.htmhttp://www.securityfocus.com/bid/14595https://www.exploit-db.com/exploits/26168

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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