CVE-2020-7549 : Exploit Details and Defense Strategies
Learn about CVE-2020-7549, a CWE-754 vulnerability in the Web Server on Modicon M340 causing denial of HTTP and FTP services. Find mitigation steps and prevention measures here.
A CWE-754 vulnerability exists in the Web Server on Modicon M340, causing denial of HTTP and FTP services when receiving specially crafted requests.
Understanding CVE-2020-7549
This CVE involves an Improper Check for Unusual or Exceptional Conditions vulnerability in the Web Server on Modicon M340.
What is CVE-2020-7549?
The vulnerability in the Web Server on Modicon M340 could lead to denial of HTTP and FTP services due to specially crafted requests.
The Impact of CVE-2020-7549
The vulnerability could be exploited to disrupt HTTP and FTP services by sending specific requests to the controller over HTTP.
Technical Details of CVE-2020-7549
This section provides detailed technical information about the CVE.
Vulnerability Description
The CWE-754 vulnerability allows attackers to disrupt HTTP and FTP services by sending crafted requests to the Web Server on Modicon M340.
Affected Systems and Versions
- Web Server on Modicon M340
- Legacy Offers Modicon Quantum and Modicon Premium
- Associated Communication Modules (refer to security notification for affected versions)
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a series of specially crafted requests to the controller over HTTP.
Mitigation and Prevention
Protect your systems from CVE-2020-7549 with the following steps:
Immediate Steps to Take
- Apply security patches provided by the vendor
- Monitor network traffic for any unusual patterns
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Implement network segmentation to limit the impact of potential attacks
Patching and Updates
Ensure timely installation of security updates and patches to mitigate the risk of exploitation.