CVE-2020-3179 : Exploit Details and Defense Strategies
Learn about CVE-2020-3179, a vulnerability in Cisco Firepower Threat Defense Software that allows remote attackers to cause a denial of service condition. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
Understanding CVE-2020-3179
This CVE involves a vulnerability in Cisco Firepower Threat Defense Software that could lead to a DoS attack.
What is CVE-2020-3179?
The vulnerability in the GRE tunnel decapsulation feature of Cisco FTD Software allows a remote attacker to trigger a DoS condition by exploiting a memory handling error when processing GRE over IPv6 traffic.
The Impact of CVE-2020-3179
- An unauthenticated attacker can cause a DoS condition on affected devices by sending crafted GRE over IPv6 packets with specific payloads.
- Successful exploitation can lead to device crashes, resulting in service disruption.
Technical Details of CVE-2020-3179
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability arises from a memory handling error in processing GRE over IPv6 traffic in Cisco Firepower Threat Defense Software.
Affected Systems and Versions
- Product: Cisco Firepower Threat Defense Software
- Vendor: Cisco
- Affected Version: Not applicable (n/a)
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Availability Impact: High
- Base Score: 8.6 (High)
- Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Mitigation and Prevention
Protecting systems from CVE-2020-3179 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor network traffic for any signs of exploitation.
- Implement firewall rules to restrict GRE traffic.
Long-Term Security Practices
- Regularly update and patch software to address vulnerabilities.
- Conduct security assessments and penetration testing to identify weaknesses.
- Educate users and IT staff on security best practices.
Patching and Updates
- Cisco has released patches to address the vulnerability.
- Regularly check for updates and apply them to ensure system security.