Cisco VPN 3000 series concentrators with the XML filter enabled could allow unauthorized access
| cisco-vpn-xml-filter (10023) |  Medium Risk |
Description:
Cisco VPN 3000 series with the XML filter configuration enabled could allow a remote attacker to bypass security and gain unauthorized access to the network. If the XML filter configuration has been enabled, the "HTTPS on Public Inbound (XML-Auto)(forward/in)" rule is added to the public filter and protocol value is incorrectly set to "ANY" with the destination port set as "443". This could allow a remote attacker to gain unauthorized access to the network since the concentrator would then permit any protocol to access the concentrator through any port.
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 3002 Hardware Client
Remedy:
Upgrade to the latest software version for your device (3.6(Rel) or later) or (3.5.3 or later), as listed in Cisco Security Advisory: Cisco VPN 3000 Concentrator Multiple Vulnerabilities. See References.
Consequences:
Bypass Security
References:
- CIAC Information Bulletin M-119, Cisco VPN Concentrators and VPN 3002 Client Multiple Vulnerabilities at http://www.ciac.org/ciac/bulletins/m-119.shtml.
- vpn3k-multiple-vuln-pub, Cisco Security Advisory: Cisco VPN 3000 Concentrator Multiple Vulnerabilities at http://www.cisco.com/warp/public/707/vpn3k-multiple-vuln-pub.shtml.
- BID-5609: Multiple Cisco VPN 3000 Vulnerabilities
- BID-5614: Cisco VPN 3000 Series Concentrator XML Filter Misconfigured Access Vulnerability
- CVE-2002-1098: Cisco VPN 3000 Concentrator 2.2.x, and 3.x before 3.5.3, adds an HTTPS on Public Inbound (XML-Auto)(forward/in) rule but sets the protocol to ANY when the XML filter configuration is enabled, which ultimately allows arbitrary traffic to pass through the concentrator.
Reported:
Sep 03, 2002
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