Severity
High
Analysis Summary
CVE-2021-1402
A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message through an affected device. SSL/TLS messages sent to an affected device do not trigger this vulnerability. A successful exploit could allow the attacker to cause a process to crash. This crash would then trigger a reload of the device. No manual intervention is needed to recover the device after the reload.
Impact
- Unauthorized Access
- Denial of Service
Affected Vendors
Cisco
Affected Products
- Cisco 3000 Series Industrial Security Appliances (ISAs)
- ASA 5512-X Adaptive Security Appliance
- ASA 5555-X Adaptive Security Appliance
- ASA 5515-X Adaptive Security Appliance
- ASA 5525-X Adaptive Security Appliance
- ASA 5545-X Adaptive Security Appliance
- Firepower 1000 Series
- Firepower 2100 Series
- Firepower threat Defense Vitrual (FTDv)
Remediation
Refer to Cisco advisory for the complete list of affected product and their respective patches.