CVE-2021-40142 : Vulnerability Insights and Analysis
Learn about CVE-2021-40142, a high-severity vulnerability in OPC Foundation Local Discovery Server enabling DoS attacks. Find mitigation steps and necessary long-term security practices.
In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.
Understanding CVE-2021-40142
This section provides insights into the impact and technical details of the CVE.
What is CVE-2021-40142?
CVE-2021-40142 refers to a vulnerability in OPC Foundation Local Discovery Server (LDS) that allows remote attackers to trigger a denial of service by exploiting memory access beyond buffer boundaries.
The Impact of CVE-2021-40142
The vulnerability has a CVSS base score of 7.5 (High severity) with a network attack vector and high availability impact. The attack complexity is low, and no user interaction or privileges are required.
Technical Details of CVE-2021-40142
In this section, we delve into the specifics of the vulnerability.
Vulnerability Description
The vulnerability in OPC Foundation Local Discovery Server (LDS) before 1.04.402.463 enables attackers to execute a DoS attack by manipulating messages to access memory locations beyond buffer limits.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions Affected: <ul><li>Version: n/a</li></ul>
Exploitation Mechanism
The exploitation of this vulnerability involves sending specially crafted messages to the server, causing the unintended memory access and subsequent DoS.
Mitigation and Prevention
Learn about the necessary steps to mitigate the risks associated with CVE-2021-40142.
Immediate Steps to Take
- Update OPC Foundation Local Discovery Server to version 1.04.402.463 or later.
- Implement network security measures to detect and block malicious traffic.
Long-Term Security Practices
- Regularly monitor and audit network traffic for anomalies.
- Employ intrusion detection/prevention systems to detect unusual activities.
- Stay informed about security bulletins and updates from OPC Foundation.
Patching and Updates
Ensure timely patches and updates are applied to all relevant systems to prevent exploitation of this vulnerability.