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Vulnerability record · CVE-2005-2640 · published 23 August 2005

CVE-2005-2640: Neoteris instant virtual extranet vulnerability

NNeoteris · Instant Virtual Extranet

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.

5.0 CVSS 2.0 Medium EPSS 7.1% · top 6.0%
5.0CVSS 2.0 base score
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
16Affected product versions listed by NVD
10References, 4 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

16 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=112438068426034&w=2
http://secunia.com/advisories/16474/ Vendor Advisory
http://securitytracker.com/id?1014728
http://www.nta-monitor.com/news/vpn-flaws/juniper/netscreen/index.htm ExploitVendor Advisory
http://www.securityfocus.com/bid/14595 Exploit
http://marc.info/?l=bugtraq&m=112438068426034&w=2
http://secunia.com/advisories/16474/ Vendor Advisory
http://securitytracker.com/id?1014728
http://www.nta-monitor.com/news/vpn-flaws/juniper/netscreen/index.htm ExploitVendor Advisory
http://www.securityfocus.com/bid/14595 Exploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2005-2640), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.