Cisco PIX Firewall VPN client configuration denial of service
| cisco-pix-vpn-dos (13989) |  Medium Risk |
Description:
Cisco PIX Firewall is vulnerable to a denial of service. If the device is configured as a VPN client, a remote attacker could attempt to establish an IKE Phase I negotiation with the vulnerable client to cause the client to drop an existing VPNC IPSec tunnel connection, which would result in a denial of service for the existing IPSec session.
Platforms Affected:
- Cisco, PIX Firewall 6.2
- Cisco, PIX Firewall 6.2(1)
- Cisco, PIX Firewall 6.2(2)
- Cisco, PIX Firewall 6.2(2.111)
- Cisco, PIX Firewall 6.2(3)
- Cisco, PIX Firewall 6.2(3.100)
Remedy:
Upgrade to the latest software version for your device, as listed in Cisco Security Advisory 2003 dated December 15 at 1600 UTC (GMT). See References.
Consequences:
Denial of Service
References:
- CIAC Information Bulletin O-040, CISCO PIX Vulnerabilities at http://www.ciac.org/ciac/bulletins/o-040.shtml.
- Cisco Systems Inc. Security Advisory, 2003 December 15 at 1600 UTC (GMT), Cisco PIX Vulnerabilities at http://www.cisco.com/warp/public/707/cisco-sa-20031215-pix.shtml.
- BID-9221: Multiple Cisco PIX Remote Denial Of Service Vulnerabilities
- CVE-2003-1004: Cisco PIX firewall 6.2.x through 6.2.3, when configured as a VPN Client, allows remote attackers to cause a denial of service (dropped IPSec tunnel connection) via an IKE Phase I negotiation request to the outside interface of the firewall.
Reported:
Dec 15, 2003
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