Discover the details of CVE-2021-21956, a high-severity php unserialize vulnerability in CloudLinux Inc Imunify360 5.10.2 allowing arbitrary command execution. Learn about the impact, affected versions, and mitigation steps.
A php unserialize vulnerability exists in the Ai-Bolit functionality of CloudLinux Inc Imunify360 5.10.2, allowing potential arbitrary command execution through a specially crafted malformed file.
Understanding CVE-2021-21956
This CVE involves a vulnerability in CloudLinux Inc Imunify360 that could be exploited by an attacker to execute arbitrary commands.
What is CVE-2021-21956?
The vulnerability in Ai-Bolit functionality of Imunify360 version 5.10.2 allows an attacker to trigger potential arbitrary command execution using a specially-crafted file.
The Impact of CVE-2021-21956
With a CVSS base score of 8.2 (High), this vulnerability poses a significant threat with high confidentiality and integrity impacts, even if the availability impact is rated as "None".
Technical Details of CVE-2021-21956
This section covers details about the vulnerability, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability arises from a php unserialize issue in the Ai-Bolit feature of Imunify360 version 5.10.2, enabling attackers to execute arbitrary commands.
Affected Systems and Versions
Imunify360 versions 5.8 and 5.9 are confirmed to be affected by this vulnerability, emphasizing the importance of timely updates and patches.
Exploitation Mechanism
By providing a specially-crafted malformed file, malicious actors can exploit this vulnerability to execute arbitrary commands within the affected system.
Mitigation and Prevention
To safeguard systems from CVE-2021-21956, immediate actions and long-term security measures are essential.
Immediate Steps to Take
Update Imunify360 to a secure version and implement additional security controls to mitigate the risk of unauthorized command execution.
Long-Term Security Practices
Regularly monitor for security updates, conduct thorough vulnerability assessments, and enforce secure coding practices to prevent similar exploits in the future.
Patching and Updates
CloudLinux Inc should release patches promptly to address the vulnerability and protect users from potential exploits.