CVE-2005-2640

Exp

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: 2005-08-23 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2005-2640 is rated High Exploit Risk (62.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 5.88%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2005-2640

EDB-ID Source Kind Published Link
26168 exploit_db edb 2005-08-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2005-2640

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 9.98% 5.88% -4.10%
2 2025-03-29 5.88% 9.98% +4.10%
3 2025-03-19 — 5.88% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2005-2640

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2005-2640

Affected software / configurations for CVE-2005-2640

Vendor Product Version Raw CPE
neoteris instant_virtual_extranet 3.0 cpe:2.3:a:neoteris:instant_virtual_extranet:3.0:*:*:*:*:*:*:*
neoteris instant_virtual_extranet 3.1 cpe:2.3:a:neoteris:instant_virtual_extranet:3.1:*:*:*:*:*:*:*
neoteris instant_virtual_extranet 3.2 cpe:2.3:a:neoteris:instant_virtual_extranet:3.2:*:*:*:*:*:*:*
neoteris instant_virtual_extranet 3.3 cpe:2.3:a:neoteris:instant_virtual_extranet:3.3:*:*:*:*:*:*:*
neoteris instant_virtual_extranet 3.3.1 cpe:2.3:a:neoteris:instant_virtual_extranet:3.3.1:*:*:*:*:*:*:*
juniper netscreen_screenos 1.7 cpe:2.3:o:juniper:netscreen_screenos:1.7:*:*:*:*:*:*:*
juniper netscreen_screenos 1.64 cpe:2.3:o:juniper:netscreen_screenos:1.64:*:*:*:*:*:*:*
juniper netscreen_screenos 1.66 cpe:2.3:o:juniper:netscreen_screenos:1.66:*:*:*:*:*:*:*
juniper netscreen_screenos 1.66_r2 cpe:2.3:o:juniper:netscreen_screenos:1.66_r2:*:*:*:*:*:*:*
juniper netscreen_screenos 1.73_r1 cpe:2.3:o:juniper:netscreen_screenos:1.73_r1:*:*:*:*:*:*:*
juniper netscreen_screenos 1.73_r2 cpe:2.3:o:juniper:netscreen_screenos:1.73_r2:*:*:*:*:*:*:*
juniper netscreen_screenos 2.0.1_r8 cpe:2.3:o:juniper:netscreen_screenos:2.0.1_r8:*:*:*:*:*:*:*
juniper netscreen_screenos 2.1 cpe:2.3:o:juniper:netscreen_screenos:2.1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.1_r6 cpe:2.3:o:juniper:netscreen_screenos:2.1_r6:*:*:*:*:*:*:*
juniper netscreen_screenos 2.1_r7 cpe:2.3:o:juniper:netscreen_screenos:2.1_r7:*:*:*:*:*:*:*
juniper netscreen_screenos 2.5 cpe:2.3:o:juniper:netscreen_screenos:2.5:*:*:*:*:*:*:*
juniper netscreen_screenos 2.5r1 cpe:2.3:o:juniper:netscreen_screenos:2.5r1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.5r2 cpe:2.3:o:juniper:netscreen_screenos:2.5r2:*:*:*:*:*:*:*
juniper netscreen_screenos 2.5r6 cpe:2.3:o:juniper:netscreen_screenos:2.5r6:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.0 cpe:2.3:o:juniper:netscreen_screenos:2.6.0:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1 cpe:2.3:o:juniper:netscreen_screenos:2.6.1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r1 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r2 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r2:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r3 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r3:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r4 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r4:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r5 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r5:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r6 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r6:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r7 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r7:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r8 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r8:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r9 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r9:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r10 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r10:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r11 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r11:*:*:*:*:*:*:*
juniper netscreen_screenos 2.6.1r12 cpe:2.3:o:juniper:netscreen_screenos:2.6.1r12:*:*:*:*:*:*:*
juniper netscreen_screenos 2.7.1 cpe:2.3:o:juniper:netscreen_screenos:2.7.1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.7.1r1 cpe:2.3:o:juniper:netscreen_screenos:2.7.1r1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.7.1r2 cpe:2.3:o:juniper:netscreen_screenos:2.7.1r2:*:*:*:*:*:*:*
juniper netscreen_screenos 2.7.1r3 cpe:2.3:o:juniper:netscreen_screenos:2.7.1r3:*:*:*:*:*:*:*
juniper netscreen_screenos 2.8 cpe:2.3:o:juniper:netscreen_screenos:2.8:*:*:*:*:*:*:*
juniper netscreen_screenos 2.8_r1 cpe:2.3:o:juniper:netscreen_screenos:2.8_r1:*:*:*:*:*:*:*
juniper netscreen_screenos 2.10_r3 cpe:2.3:o:juniper:netscreen_screenos:2.10_r3:*:*:*:*:*:*:*
juniper netscreen_screenos 2.10_r4 cpe:2.3:o:juniper:netscreen_screenos:2.10_r4:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.0 cpe:2.3:o:juniper:netscreen_screenos:3.0.0:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.0r1 cpe:2.3:o:juniper:netscreen_screenos:3.0.0r1:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.0r2 cpe:2.3:o:juniper:netscreen_screenos:3.0.0r2:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.0r3 cpe:2.3:o:juniper:netscreen_screenos:3.0.0r3:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.0r4 cpe:2.3:o:juniper:netscreen_screenos:3.0.0r4:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1 cpe:2.3:o:juniper:netscreen_screenos:3.0.1:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r1 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r1:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r2 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r2:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r3 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r3:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r4 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r4:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r5 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r5:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r6 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r6:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.1r7 cpe:2.3:o:juniper:netscreen_screenos:3.0.1r7:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.2 cpe:2.3:o:juniper:netscreen_screenos:3.0.2:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3 cpe:2.3:o:juniper:netscreen_screenos:3.0.3:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3_r1.1 cpe:2.3:o:juniper:netscreen_screenos:3.0.3_r1.1:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r1 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r1:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r2 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r2:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r3 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r3:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r4 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r4:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r5 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r5:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r6 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r6:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r7 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r7:*:*:*:*:*:*:*
juniper netscreen_screenos 3.0.3r8 cpe:2.3:o:juniper:netscreen_screenos:3.0.3r8:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0 cpe:2.3:o:juniper:netscreen_screenos:3.1.0:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r1 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r1:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r2 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r2:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r3 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r3:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r4 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r4:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r5 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r5:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r6 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r6:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r7 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r7:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r8 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r8:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r9 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r9:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r10 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r10:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r11 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r11:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.0r12 cpe:2.3:o:juniper:netscreen_screenos:3.1.0r12:*:*:*:*:*:*:*
juniper netscreen_screenos 3.1.1_r2 cpe:2.3:o:juniper:netscreen_screenos:3.1.1_r2:*:*:*:*:*:*:*
juniper netscreen_screenos 4.0.0 cpe:2.3:o:juniper:netscreen_screenos:4.0.0:*:*:*:*:*:*:*

References for CVE-2005-2640

cvelogic Threat Intelligence