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Category:   Device (Firewall)  >   Cisco ASA Vendors:   Cisco
Cisco ASA IKEv1 XAUTH Parameter Validation Flaw Lets Remote Authenticated Users Cause the Target System to Reload
SecurityTracker Alert ID:  1038314
SecurityTracker URL:  http://securitytracker.com/id/1038314
CVE Reference:   CVE-2017-6610   (Links to External Site)
Date:  Apr 20 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco ASA. A remote authenticated user can cause the target system to reload.

A remote authenticated user can with a valid IKEv1 Phase 1 security exchange can send specially crafted IKEv1 XAUTH parameters to the target system to trigger a validation error and cause the target system to reload.

The following models are affected:

ASA 1000V Cloud Firewall
ASA 5500 Series Adaptive Security Appliances
ASA 5500-X Series Next-Generation Firewalls
ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers
Adaptive Security Virtual Appliance (ASAv)
ASA for Firepower 9300 Series
ISA 3000 Industrial Security Appliance

Systems configured only to terminate the following VPN connections are not affected:

Clientless SSL
AnyConnect SSL
IKEv2 AnyConnect
LAN-to-LAN VPN
L2TP-IPsec VPN

The vendor has assigned bug ID CSCuz11685 to this vulnerability.

Impact:   A remote authenticated user can cause the target system to reload.
Solution:   The vendor has issued a fix (9.1(7.7), 9.2(4.11), 9.4(4), 9.5(3), 9.6(1.5)).

The vendor advisory is available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-xauth

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-xauth (Links to External Site)
Cause:   Input validation error

Message History:   None.


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