Cisco VPN 3000 series concentrators disclose sensitive information in application layer banners

cisco-vpn-banner-information (10020) The risk level is classified as LowLow Risk

Description:

Cisco VPN 3000 series concentrators could allow a remote attacker to obtain sensitive information in the application layer banners. A remote attacker could send an SSH (Secure Shell), FTP, or HTTP request to a vulnerable device, which could cause the concentrator to return sensitive information about the device in the response to the attacker. An attacker could then use this information to launch further attacks against the affected device.


Consequences:

Obtain Information

Remedy:

Upgrade to the latest software version for your device (3.6(Rel) or later) or (3.5.4 or later), as listed in Cisco Security Advisory: Cisco VPN 3000 Concentrator Multiple Vulnerabilities. See References.

References:

  • CIAC Information Bulletin M-119: Cisco VPN Concentrators and VPN 3002 Client Multiple Vulnerabilities.
  • vpn3k-multiple-vuln-pub: Cisco Security Advisory: Cisco VPN 3000 Concentrator Multiple Vulnerabilities.
  • BID-5609: Multiple Cisco VPN 3000 Vulnerabilities
  • BID-5621: Cisco VPN Concentrator SSH Banner Device Information Leakage Vulnerability
  • BID-5623: Cisco VPN Concentrator FTP Banner Device Information Leakage Vulnerability
  • BID-5624: Cisco VPN Concentrator HTTP Error Page Device Information Leakage Vulnerability
  • CVE-2002-1094: Information leaks in Cisco VPN 3000 Concentrator 2.x.x and 3.x.x before 3.5.4 allow remote attackers to obtain potentially sensitive information via the (1) SSH banner, (2) FTP banner, or (3) an incorrect HTTP request.
  • OSVDB ID: 8909: Cisco VPN 3000 Concentrator Multiple Service Banner System Information Disclosure

Platforms Affected:

  • Cisco VPN 3000 Concentrator 2.0
  • Cisco VPN 3000 Concentrator 2.5.2.A
  • Cisco VPN 3000 Concentrator 2.5.2.B
  • Cisco VPN 3000 Concentrator 2.5.2.C
  • Cisco VPN 3000 Concentrator 2.5.2.D
  • Cisco VPN 3000 Concentrator 2.5.2.F
  • Cisco VPN 3000 Concentrator 3.0
  • Cisco VPN 3000 Concentrator 3.0(Rel)
  • Cisco VPN 3000 Concentrator 3.0.3.A
  • Cisco VPN 3000 Concentrator 3.0.3.B
  • Cisco VPN 3000 Concentrator 3.0.4
  • Cisco VPN 3000 Concentrator 3.1
  • Cisco VPN 3000 Concentrator 3.1(Rel)
  • Cisco VPN 3000 Concentrator 3.1.1
  • Cisco VPN 3000 Concentrator 3.1.2
  • Cisco VPN 3000 Concentrator 3.1.4
  • 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
  • Cisco VPN 3002 Hardware Client

Reported:

Sep 03, 2002

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