CVE-2021-26566 Explained : Impact and Mitigation
Discover the details of CVE-2021-26566 where attackers could execute arbitrary commands on Synology DiskStation Manager before 6.2.3-25426-3. Learn the impact, technical insights, and mitigation steps.
A vulnerability in Synology DiskStation Manager (DSM) before version 6.2.3-25426-3 could allow man-in-the-middle attackers to execute arbitrary commands. Here is what you need to know about CVE-2021-26566.
Understanding CVE-2021-26566
This section provides insight into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2021-26566?
The vulnerability involves the insertion of sensitive information into sent data in synorelayd in Synology DiskStation Manager (DSM) before version 6.2.3-25426-3, allowing attackers to execute arbitrary commands via inbound QuickConnect traffic.
The Impact of CVE-2021-26566
With a CVSS base score of 8.3, this vulnerability has a high severity level. Attackers can exploit it to execute arbitrary commands, posing risks to confidentiality, integrity, and availability of the affected systems.
Technical Details of CVE-2021-26566
Let's delve deeper into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises from the improper handling of sent data in synorelayd, enabling man-in-the-middle attackers to inject and execute arbitrary commands.
Affected Systems and Versions
The affected product is Synology DiskStation Manager (DSM) with versions prior to 6.2.3-25426-3.
Exploitation Mechanism
Attackers exploit this vulnerability through inbound QuickConnect traffic, enabling them to carry out arbitrary commands.
Mitigation and Prevention
Learn how to protect your systems from CVE-2021-26566.
Immediate Steps to Take
Users are advised to update Synology DiskStation Manager to version 6.2.3-25426-3 or later to mitigate the vulnerability. Additionally, monitor network traffic for any suspicious activities.
Long-Term Security Practices
Implement strong network segmentation, access controls, and regular security audits to enhance overall security posture.
Patching and Updates
Regularly apply security patches released by Synology to address known vulnerabilities and safeguard your systems.