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Category:   Device (Firewall)  >   Cisco ASA Vendors:   Cisco
Cisco ASA Ingress Software Lock Error Lets Remote Users Consume Excessive CPU Resources on the Target System
SecurityTracker Alert ID:  1040724
SecurityTracker URL:  http://securitytracker.com/id/1040724
CVE Reference:   CVE-2018-0228   (Links to External Site)
Date:  Apr 19 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco ASA. A remote user can consume excessive CPU resources on the target system.

A remote user can send a stream of specially crafted IP packets to create connections on the target device and exploit an internal software lock error and consume excessive CPU resources on the target system. As a result, traffic through the target device may be delayed.

The following models are affected:

ASA 5500 Series
ASA 5500-X Series
ASA Services Module for Cisco Catalyst 6500 Series and Cisco 7600 Series
Adaptive Security Virtual Appliances (ASAv)

The vendor has assigned bug ID CSCvf63718 to this vulnerability.

Impact:   A remote user can consume excessive CPU resources on the target system and cause traffic through the target system to be delayed.
Solution:   The vendor has issued a fix (9.1.7.20, 9.2.4.27, 9.4.4.13, 9.6.3.17, 9.6.4.6, 9.7.1.16, 9.8.2.14, 9.9.1).

The vendor advisory is available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-asa2

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-asa2 (Links to External Site)
Cause:   Randomization error

Message History:   None.


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