CVE-2020-3369 : Exploit Details and Defense Strategies
Learn about CVE-2020-3369, a high-severity vulnerability in Cisco SD-WAN vEdge Routers that could allow remote attackers to trigger a denial of service condition. Find out the impact, technical details, and mitigation steps.
A vulnerability in the deep packet inspection (DPI) engine of Cisco SD-WAN vEdge Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
Understanding CVE-2020-3369
This CVE involves a denial of service vulnerability in Cisco SD-WAN vEdge Routers due to improper processing of FTP traffic.
What is CVE-2020-3369?
The vulnerability in the deep packet inspection engine of Cisco SD-WAN vEdge Routers allows attackers to trigger a DoS condition by sending crafted FTP packets.
The Impact of CVE-2020-3369
- CVSS Base Score: 8.6 (High Severity)
- Attack Vector: Network
- Availability Impact: High
- The vulnerability could lead to continuous reboots, causing a DoS condition on the device.
Technical Details of CVE-2020-3369
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability is a result of improper handling of FTP traffic within the deep packet inspection engine of Cisco SD-WAN vEdge Routers.
Affected Systems and Versions
- Affected Product: Cisco SD-WAN vEdge router
- Vendor: Cisco
- Affected Version: Not applicable (n/a)
Exploitation Mechanism
Attackers can exploit this vulnerability by sending specially crafted FTP packets through the affected device, leading to a DoS condition.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all network devices and software.
- Conduct security assessments and penetration testing to identify vulnerabilities.
- Educate users and IT staff on best security practices.
- Implement intrusion detection and prevention systems.
- Stay informed about security advisories and updates from vendors.
Patching and Updates
Ensure that the affected Cisco SD-WAN vEdge Routers are updated with the latest patches provided by Cisco to mitigate the vulnerability.