CVE-2021-1445: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
First published: Thu Apr 29 2021(Updated: )
Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Threat Defense | >=6.5.0<6.6.4 | |
| Cisco Firepower Threat Defense | >=6.7.0<6.7.0.1 | |
| Cisco Adaptive Security Appliance Software | >=9.7<9.8.4.34 | |
| Cisco Adaptive Security Appliance Software | >=9.9<9.9.2.85 | |
| Cisco Adaptive Security Appliance Software | >=9.10<9.12.4.13 | |
| Cisco Adaptive Security Appliance Software | >=9.13<9.13.1.21 | |
| Cisco Adaptive Security Appliance Software | >=9.14<9.14.2.8 | |
| Cisco Adaptive Security Appliance Software | >=9.15<9.15.1.7 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-1445?
CVE-2021-1445 is a vulnerability in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
Which software is affected by CVE-2021-1445?
Cisco Adaptive Security Appliance (ASA) Software version 9.7 and later, and Firepower Threat Defense (FTD) Software versions 6.5.0 to 6.6.4, 6.7.0, and 6.7.0.1 are affected by CVE-2021-1445.
What is the severity of CVE-2021-1445?
The severity of CVE-2021-1445 is high with a CVSS score of 7.5.
How can an attacker exploit CVE-2021-1445?
An unauthenticated, remote attacker can exploit CVE-2021-1445 by sending a specially crafted HTTP packet to the affected device, causing a DoS condition.
Is there a fix for CVE-2021-1445?
Yes, Cisco has released software updates to address CVE-2021-1445. It is recommended to update to the latest available version of Cisco Adaptive Security Appliance (ASA) Software or Firepower Threat Defense (FTD) Software.
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