CVE-2021-1501: Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software SIP Denial of Service Vulnerability
A vulnerability in the SIP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.The vulnerability is due to a crash that occurs during a hash lookup for a SIP pinhole connection. An attacker could exploit this vulnerability by sending crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a crash and reload of the affected device.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-1501.
What is the severity of CVE-2021-1501?
The severity of CVE-2021-1501 is high with a score of 7.5.
What is the affected software?
The affected software includes Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software.
How does CVE-2021-1501 affect the affected software?
CVE-2021-1501 could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.
Is there a fix available for CVE-2021-1501?
Yes, Cisco has released software updates to address this vulnerability. Please refer to the Cisco Security Advisory for more details.