CVE-2018-0228: Input Validation
First published: Thu Apr 19 2018(Updated: )
A vulnerability in the ingress flow creation functionality of Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause the CPU to increase upwards of 100% utilization, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to incorrect handling of an internal software lock that could prevent other system processes from getting CPU cycles, causing a high CPU condition. An attacker could exploit this vulnerability by sending a steady stream of malicious IP packets that can cause connections to be created on the targeted device. A successful exploit could allow the attacker to exhaust CPU resources, resulting in a DoS condition during which traffic through the device could be delayed. This vulnerability applies to either IPv4 or IPv6 ingress traffic. This vulnerability affects Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) Software that is running on the following Cisco products: 3000 Series Industrial Security Appliances (ISA), 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 Appliances (ASAv), Firepower 2100 Series Security Appliances, Firepower 4110 Security Appliances, Firepower 9300 ASA Security Modules. Cisco Bug IDs: CSCvf63718.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Adaptive Security Appliance | >=9.1<9.1.7.20 | |
| Cisco Adaptive Security Appliance | >=9.3<9.4.4.13 | |
| Cisco Adaptive Security Appliance | >=9.5<9.6.3.17 | |
| Cisco Adaptive Security Appliance | >=9.7<9.7.1.16 | |
| Cisco Adaptive Security Appliance | >=9.8<9.8.2.14 | |
| Cisco Adaptive Security Appliance | >=9.2<9.2.4.27 | |
| Cisco Adaptive Security Appliance | >=9.9<9.9.1 | |
| Cisco Adaptive Security Appliance | =98.1\(12.187\) | |
| Cisco Firepower Threat Defense | >=6.0<6.1.0.6 | |
| Cisco Firepower Threat Defense | >=6.2.0<6.2.0.5 | |
| Cisco Firepower Threat Defense | >=6.2.1<6.2.2.2 | |
| Cisco Adaptive Security Appliance Software | >=9.1<9.1.7.20 | |
| Cisco Adaptive Security Appliance Software | >=9.3<9.4.4.13 | |
| Cisco Adaptive Security Appliance Software | >=9.5<9.6.3.17 | |
| Cisco Adaptive Security Appliance Software | >=9.7<9.7.1.16 | |
| Cisco Adaptive Security Appliance Software | >=9.8<9.8.2.14 | |
| Cisco Adaptive Security Appliance Software | >=9.2<9.2.4.27 | |
| Cisco Adaptive Security Appliance Software | >=9.9<9.9.1 | |
| Cisco Adaptive Security Appliance Software | =98.1\(12.187\) |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-0228?
CVE-2018-0228 is rated as a high severity vulnerability due to its potential to cause a denial of service (DoS) by exhausting CPU resources.
How does CVE-2018-0228 affect Cisco Adaptive Security Appliances?
CVE-2018-0228 affects Cisco Adaptive Security Appliances by allowing an unauthenticated remote attacker to increase the CPU utilization to over 100%, leading to service degradation.
What versions of Cisco Adaptive Security Appliance software are affected by CVE-2018-0228?
CVE-2018-0228 affects multiple Cisco Adaptive Security Appliance software versions including those within the 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, and 9.9 series.
How can I fix CVE-2018-0228?
To mitigate CVE-2018-0228, it is recommended to upgrade the Cisco Adaptive Security Appliance to a patched version as specified by Cisco.
Is it possible to exploit CVE-2018-0228 from a remote location?
Yes, CVE-2018-0228 can be exploited by an unauthenticated remote attacker, which makes it particularly concerning for network security.
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