CVE-2020-3577 : Vulnerability Insights and Analysis
Learn about CVE-2020-3577, a vulnerability in Cisco Firepower Threat Defense Software that allows unauthenticated attackers to cause a denial of service (DoS) condition. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in the ingress packet processing path of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated attacker to cause a denial of service (DoS) condition.
Understanding CVE-2020-3577
This CVE involves a vulnerability in Cisco Firepower Threat Defense Software that could lead to a DoS condition.
What is CVE-2020-3577?
The vulnerability in the ingress packet processing path of Cisco Firepower Threat Defense Software allows an unauthenticated attacker to trigger a DoS condition by sending malicious Ethernet frames through the affected device.
The Impact of CVE-2020-3577
- Attack Complexity: Low
- Attack Vector: Adjacent Network
- Availability Impact: High
- Base Score: 7.4 (High)
- Scope: Changed
- No privileges required for exploitation
Technical Details of CVE-2020-3577
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability is due to insufficient validation when processing Ethernet frames, enabling an attacker to cause a DoS condition by either filling the device's partition or causing a process crash.
Affected Systems and Versions
- Product: Cisco Firepower Threat Defense Software
- Vendor: Cisco
- Affected Version: Not Applicable
Exploitation Mechanism
An unauthenticated attacker can exploit this vulnerability by sending malicious Ethernet frames through the affected device, leading to a DoS condition.
Mitigation and Prevention
Protecting systems from CVE-2020-3577 is crucial for maintaining security.
Immediate Steps to Take
- Contact Cisco Technical Assistance Center (TAC) for recovery assistance if the device's /ngfw partition is filled.
- Monitor for any unusual network activity that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update and patch Cisco Firepower Threat Defense Software to mitigate known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Apply the latest security updates and patches provided by Cisco to address CVE-2020-3577.