CVE-2020-35139 : Exploit Details and Defense Strategies

CVE-2020-35139, published by MITRE, identifies an issue in OFPBundleCtrlMsg in parser.py in Faucet SDN Ryu version 4.34, allowing remote attackers to trigger a denial of service (DoS) through an infinite loop.

Understanding CVE-2020-35139

What is CVE-2020-35139?

CVE-2020-35139 is a vulnerability in Faucet SDN Ryu version 4.34 that can be exploited by remote attackers to cause a denial of service by triggering an infinite loop.

The Impact of CVE-2020-35139

This vulnerability can lead to a denial of service (DoS) condition, potentially disrupting network operations and services.

Technical Details of CVE-2020-35139

Vulnerability Description

The issue lies in OFPBundleCtrlMsg in parser.py in Faucet SDN Ryu version 4.34, allowing attackers to exploit an infinite loop.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions of Faucet SDN Ryu version 4.34 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely to trigger an infinite loop, causing a denial of service (DoS) condition.

Mitigation and Prevention

Immediate Steps to Take

Monitor network traffic for any unusual patterns that might indicate a DoS attack.
Implement network segmentation to contain potential attacks.
Consider applying firewall rules to restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Check for patches or updates provided by the software vendor to address this vulnerability.