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Category:   Device (Firewall)  >   Cisco ASA Vendors:   Cisco
Cisco ASA Buffer Overflow in Identity Firewall Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1037059
SecurityTracker URL:  http://securitytracker.com/id/1037059
CVE Reference:   CVE-2016-6432   (Links to External Site)
Date:  Oct 19 2016
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco ASA. A remote user can execute arbitrary code on the target system.

A remote user can return a specially crafted NetBIOS packet via IPv4 in response to a NetBIOS probe sent by the target system to trigger a buffer overflow in the Identity Firewall feature and execute arbitrary code on the target system.

Systems configured in routed and transparent firewall mode and in single or multiple context mode are affected.

The following models are affected:

ASA 5500 Series Adaptive Security Appliances
ASA 5500-X Series Next-Generation Firewalls
Catalyst 6500 Series/7600 Series ASA Services Module
ASA 1000V Cloud Firewall
Adaptive Security Virtual Appliance (ASAv)
ASA for Firepower 9300 Series
ASA for Firepower 4100 Series
ISA 3000 Industrial Security Appliance

The vendor has assigned bug ID CSCvb19843 to this vulnerability.

Slipper and Kelwin (@KelwinYang) from Chaitin Technology Co., Ltd., reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-idfw

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-idfw (Links to External Site)
Cause:   Boundary error

Message History:   None.


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