CVE-2021-42983 : Security Advisory and Response

NoMachine Enterprise Client is affected by a Buffer Overflow vulnerability, allowing local attackers to execute arbitrary code or disrupt the system through a specially crafted I/O Request Packet.

Understanding CVE-2021-42983

What is CVE-2021-42983?

NoMachine Enterprise Client versions above 4.0.346 and below 7.7.4 are susceptible to Buffer Overflow, enabling local attackers to trigger arbitrary code execution or a denial of service attack.

The Impact of CVE-2021-42983

The vulnerability poses the risk of executing malicious code in kernel mode or causing a denial of service, potentially leading to memory corruption and OS crashes.

Technical Details of CVE-2021-42983

Vulnerability Description

NoMachine Enterprise Client is vulnerable to a Buffer Overflow issue.

Affected Systems and Versions

Versions above 4.0.346 and below 7.7.4 of NoMachine Enterprise Client are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability through a specially crafted I/O Request Packet.

Mitigation and Prevention

Immediate Steps to Take

Update NoMachine Enterprise Client to a version above 7.7.4 to mitigate the vulnerability.
Monitor for any suspicious activities on the system.

Long-Term Security Practices

Employ the principle of least privilege to restrict access.
Regularly update and patch software to avoid known vulnerabilities.

Patching and Updates

Regularly check for updates from NoMachine and apply patches promptly.