CVE-2020-5802 : Vulnerability Insights and Analysis
Learn about CVE-2020-5802, a denial of service vulnerability in Rockwell FactoryTalk Linx. Find out how attackers exploit memory allocation to cause system termination.
A vulnerability in Rockwell FactoryTalk Linx allows an attacker to trigger a denial of service attack by exploiting a memory allocation issue.
Understanding CVE-2020-5802
This CVE involves an unauthenticated remote denial of service vulnerability in Rockwell FactoryTalk Linx.
What is CVE-2020-5802?
An attacker can manipulate memory allocation in RnaDaSvr.dll through a crafted message, leading to an unhandled exception and termination of RSLinxNG.exe.
The Impact of CVE-2020-5802
The vulnerability can be exploited to cause a denial of service, affecting the availability of the affected system.
Technical Details of CVE-2020-5802
This section provides more technical insights into the CVE.
Vulnerability Description
The flaw allows an attacker to pass a controlled memory allocation size to the C++ new operator, triggering an unhandled exception.
Affected Systems and Versions
- Product: Rockwell FactoryTalk Linx
- Versions: All versions of FactoryTalk Linx
Exploitation Mechanism
By sending a specially crafted ConfigureItems message to TCP port 4241, an attacker can exploit the vulnerability.
Mitigation and Prevention
Protect your systems from CVE-2020-5802 with the following measures.
Immediate Steps to Take
- Monitor network traffic for any suspicious activity targeting TCP port 4241.
- Implement firewall rules to restrict access to vulnerable services.
Long-Term Security Practices
- Regularly update and patch Rockwell FactoryTalk Linx to mitigate known vulnerabilities.
Patching and Updates
Stay informed about security updates and apply patches promptly to address CVE-2020-5802.