{"id":"CVE-2005-2640","aliases":["EUVD-2005-2641","GHSA-8h6v-vg4c-567j"],"status":"published","title":"Behavioral discrepancy information leak in Juniper Netscreen VPN running ScreenOS 5.2.0 and...","description":"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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.07093,"percentile":0.94274,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2005-08-20T04:00:00Z","modified":"2026-06-16T22:15:23Z","exploits":[{"source":"exploitdb","id":"EDB-26168","title":"Juniper NetScreen 5.0 - VPN 'Username' Enumeration","type":"remote","platform":"hardware","date":"2005-08-18","verified":true,"url":"https://www.exploit-db.com/exploits/26168"}],"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"}],"references":[{"url":"http://www.securityfocus.com/bid/14595","tags":["vdb-entry","x_refsource_BID","x_transferred","Exploit"]},{"url":"http://marc.info/?l=bugtraq\u0026m=112438068426034\u0026w=2","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.nta-monitor.com/news/vpn-flaws/juniper/netscreen/index.htm","tags":["x_refsource_MISC","x_transferred","Exploit","Vendor Advisory"]},{"url":"http://securitytracker.com/id?1014728","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://secunia.com/advisories/16474/","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2005-2640"},{"url":"http://secunia.com/advisories/16474"},{"url":"https://github.com/advisories/GHSA-8h6v-vg4c-567j"}],"sources":{"cve":[{"id":"CVE-2005-2640","description":"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.","status":"published","published":"2005-08-20T04:00:00Z","modified":"2024-08-07T22:45:01.317Z","updated_at":"2026-11-02T14:33:37.446553Z"}],"euvd":[{"id":"EUVD-2005-2641","description":"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.","status":"published","published":"2005-08-20T04:00:00Z","modified":"2024-08-07T22:45:01Z","updated_at":"2026-11-03T01:15:30.050034Z"}],"ghsa":[{"id":"GHSA-8h6v-vg4c-567j","title":"Behavioral discrepancy information leak in Juniper Netscreen VPN running ScreenOS 5.2.0 and...","description":"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.","status":"published","published":"2022-05-01T02:10:21Z","modified":"2025-04-03T04:17:42Z","updated_at":"2026-11-02T15:00:42.615226Z"}],"nvd":[{"id":"CVE-2005-2640","description":"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.","status":"published","published":"2005-08-23T04:00:00Z","modified":"2026-06-16T22:15:23.25Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:56.147496Z"}]}}