CVE-2021-30065 : What You Need to Know
Learn about CVE-2021-30065 affecting Schneider Electric ConneXium Tofino Firewall and Belden Tofino Xenon Security Appliance. Understand the impact, technical details, and mitigation strategies.
This article provides detailed information about CVE-2021-30065, a vulnerability found in Schneider Electric ConneXium Tofino Firewall and Belden Tofino Xenon Security Appliance.
Understanding CVE-2021-30065
CVE-2021-30065 is a security vulnerability identified in Schneider Electric ConneXium Tofino Firewall and Belden Tofino Xenon Security Appliance, allowing crafted ModBus packets to bypass the ModBus enforcer.
What is CVE-2021-30065?
This vulnerability, present in versions before 03.23 for TCSEFEA23F3F22, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance, stems from an incomplete fix related to CVE-2017-11401.
The Impact of CVE-2021-30065
With a CVSS base score of 7.5 (High), CVE-2021-30065 poses a significant risk, allowing attackers to manipulate ModBus packets, compromising the integrity of affected systems without requiring privileges.
Technical Details of CVE-2021-30065
Understanding the specifics of this vulnerability is crucial to implementing effective mitigation strategies.
Vulnerability Description
Crafted ModBus packets in specified versions can circumvent the ModBus enforcer, potentially granting unauthorized access to critical systems.
Affected Systems and Versions
Schneider Electric ConneXium Tofino Firewall versions TCSEFEA23F3F22 before 03.23, TCSEFEA23F3F20/21, and Belden Tofino Xenon Security Appliance are impacted by CVE-2021-30065.
Exploitation Mechanism
The vulnerability allows threat actors to bypass the ModBus enforcer using specially crafted ModBus packets, exploiting the incomplete fix.
Mitigation and Prevention
Taking immediate action and adopting robust security practices are essential to safeguarding systems from exploits.
Immediate Steps to Take
Organizations should apply patches and security updates provided by Schneider Electric and Belden to address CVE-2021-30065 and strengthen system defenses.
Long-Term Security Practices
Regular security assessments, network monitoring, and user awareness training can enhance the overall security posture, preventing potential cyber threats.
Patching and Updates
Stay proactive in applying patches and firmware updates released by the vendors to mitigate the risks associated with CVE-2021-30065.