Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability

BID:5621

Info

Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability

Bugtraq ID: 5621
Class: Configuration Error
CVE: CVE-2002-1094
Remote: Yes
Local: No
Published: Sep 03 2002 12:00AM
Updated: Jul 11 2009 03:56PM
Credit: Vulnerability announced in a Cisco Security Advisory.
Vulnerable: Cisco VPN 3002 Hardware Client
Cisco VPN 3000 Concentrator 3.5.3
Cisco VPN 3000 Concentrator 3.5.2
Cisco VPN 3000 Concentrator 3.5.1
Cisco VPN 3000 Concentrator 3.5 (Rel)
Cisco VPN 3000 Concentrator 3.1.4
Cisco VPN 3000 Concentrator 3.1.2
Cisco VPN 3000 Concentrator 3.1.1
Cisco VPN 3000 Concentrator 3.1 (Rel)
Cisco VPN 3000 Concentrator 3.0.4
Cisco VPN 3000 Concentrator 3.0.3 (B)
Cisco VPN 3000 Concentrator 3.0.3 (A)
Cisco VPN 3000 Concentrator 3.0
Cisco VPN 3000 Concentrator 3.0
Cisco VPN 3000 Concentrator 2.5.2 (F)
Cisco VPN 3000 Concentrator 2.5.2 (D)
Cisco VPN 3000 Concentrator 2.5.2 (C)
Cisco VPN 3000 Concentrator 2.5.2 (B)
Cisco VPN 3000 Concentrator 2.5.2 (A)
Cisco VPN 3000 Concentrator 2.0
Not Vulnerable: Cisco VPN 3000 Concentrator 3.6.1
Cisco VPN 3000 Concentrator 3.6
Cisco VPN 3000 Concentrator 3.5.5
Cisco VPN 3000 Concentrator 3.5.4

Discussion

Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability

Cisco VPN 3000 series concentrators are a family of products for facilitating secure communications via VPN (Virtual Private Networks).

Under some circumstances, it may be possible for a remote user to gain access to sensitive information. The SSH banner reveals more information than necessary to negotiate a session. This could lead to intelligence gathering, and a directed attack against network resources.

Exploit / POC

Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability

There is no exploit code required.

Solution / Fix

Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability

Solution:
Cisco has released fixes which address this issue. For Cisco VPN 3002 Hardware Client, this issue is addressed in versions 3.5.5 and 3.6.1 of the firmware.


Cisco VPN 3000 Concentrator 3.5 (Rel)

Cisco VPN 3000 Concentrator 3.5.1

Cisco VPN 3000 Concentrator 3.5.2

Cisco VPN 3000 Concentrator 3.5.3

References

Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability

References:

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