Vulnerability CVE-2005-2640
Published: 2005-08-23   Modified: 2012-02-12

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.

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Netscreen -> Ns-50ns25 
Netscreen -> Netscreen-sa 5000 series 
Netscreen -> Netscreen-sa 5020 series 
Netscreen -> Netscreen-sa 5050 series 
Netscreen -> Ns-10 
Netscreen -> Ns-100 
Netscreen -> Ns-204 
Netscreen -> Ns-500 
Neoteris -> Instant virtual extranet 
Juniper -> Netscreen-5gt 
Juniper -> Netscreen-idp 
Juniper -> Netscreen-idp 10 
Juniper -> Netscreen-idp 100 
Juniper -> Netscreen-idp 1000 
Juniper -> Netscreen-idp 500 
Juniper -> Netscreen screenos 

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