cisco-sa-20191002-asa-ftd-dos: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN CPU Denial of Service Vulnerability
First published: Wed Oct 02 2019(Updated: )
A vulnerability in the WebVPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause increased CPU utilization on an affected device. The vulnerability is due to excessive processing load for a specific WebVPN HTTP page request. An attacker could exploit this vulnerability by sending multiple WebVPN HTTP page load requests for a specific URL. A successful exploit could allow the attacker to increase CPU load on the device, resulting in a denial of service (DoS) condition, which could cause traffic to be delayed through the device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ftd-dos
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA | =9.13<9.13.1=9.12<9.12.2.9=9.10<9.10.1.30>=9.7=9.8<=9.9<9.9.2.56>=Earlier than 9.4=9.4=9.5<=9.6<9.6.4.31 | 9.13.1 9.12.2.9 9.10.1.30 9.9.2.56 9.6.4.31 |
| Cisco Firepower Threat Defense | >=Earlier than 6.1.0=6.1.0=6.2.0=6.2.1=6.2.2<=6.2.3<6.2.3.15 | 6.2.3.15 |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20191002-asa-ftd-dos?
The severity of cisco-sa-20191002-asa-ftd-dos is considered high due to its potential to cause increased CPU utilization on affected devices.
How do I fix cisco-sa-20191002-asa-ftd-dos?
To fix cisco-sa-20191002-asa-ftd-dos, upgrade to the recommended Cisco ASA Software or FTD Software versions as provided in the advisory.
Which devices are affected by cisco-sa-20191002-asa-ftd-dos?
Devices affected by cisco-sa-20191002-asa-ftd-dos include Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software.
Is cisco-sa-20191002-asa-ftd-dos exploitable remotely?
Yes, cisco-sa-20191002-asa-ftd-dos can be exploited by unauthenticated, remote attackers.
What types of attacks does cisco-sa-20191002-asa-ftd-dos enable?
cisco-sa-20191002-asa-ftd-dos enables denial of service attacks due to excessive CPU utilization.
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