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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
A vulnerability in the Internet Key Exchange Version 1 (IKEv1) XAUTH code of Cisco ASA Software could allow an authenticated, remote attacker to cause a reload of an affected system. The vulnerability is due to insufficient validation of the IKEv1 XAUTH parameters passed during an IKEv1 negotiation. An attacker could exploit this vulnerability by sending crafted parameters. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability only affects systems configured in routed firewall mode and in single or multiple context mode. This vulnerability can be triggered by IPv4 or IPv6 traffic. A valid IKEv1 Phase 1 needs to be established to exploit this vulnerability, which means that an attacker would need to have knowledge of a pre-shared key or have a valid certificate for phase 1 authentication. This vulnerability affects Cisco ASA Software running on the following products: Cisco ASA 1000V Cloud Firewall, Cisco ASA 5500 Series Adaptive Security Appliances, Cisco ASA 5500-X Series Next-Generation Firewalls, Cisco ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco ASA for Firepower 9300 Series, Cisco ISA 3000 Industrial Security Appliance. Fixed versions: 9.1(7.7) 9.2(4.11) 9.4(4) 9.5(3) 9.6(1.5). Cisco Bug IDs: CSCuz11685.
Source: MITRE View Analysis Description
Source: MITRE
Base Score: 7.7 HIGH Vector: AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H (V3 legend) Impact Score: 4.0 Exploitability Score: 3.1
Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None Scope (S): Changed Confidentiality (C): None Integrity (I): None Availability (A): High
Base Score: 6.8 MEDIUM Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:C) (V2 legend) Impact Subscore: 6.9 Exploitability Subscore: 8.0
Access Vector (AV): Network Access Complexity (AC): Low Authentication (AU): Single Confidentiality (C): None Integrity (I): None Availability (A): Complete Additional Information: Allows disruption of service
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Vulnerability Type (View All)
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.7:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)7:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.6:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)6:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1.7.4:*:*:*:*:*:*:*
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.1(7)4:*:*:*:*:*:*:*
http://www.securitytracker.com/id/1038314 [No Types Assigned]
OR *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.0.1:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.0.2:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.0.2.10:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.0.3:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.0.3.6:*:*:*:*:*:*:* *cpe:2.3:a:cisco:adaptive_security_appliance_software:9.0.3.8:*:*:*:*:*:*:* *cpe:2.3:a:
(AV:N/AC:L/Au:S/C:N/I:N/A:C)
AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE-399
http://www.securityfocus.com/bid/97934 No Types Assigned
http://www.securityfocus.com/bid/97934 Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-xauth No Types Assigned
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-xauth Vendor Advisory
http://www.securityfocus.com/bid/97934 [No Types Assigned]