CVE-2021-26563 : Security Advisory and Response
Learn about CVE-2021-26563, an incorrect authorization vulnerability in Synology DiskStation Manager (DSM) allowing local users to execute arbitrary code. Mitigate the risks effectively.
A detailed overview of CVE-2021-26563, an incorrect authorization vulnerability in Synology DiskStation Manager (DSM) that allows local users to execute arbitrary code.
Understanding CVE-2021-26563
This section provides insight into the impact and technical details of the CVE.
What is CVE-2021-26563?
The CVE-2021-26563 vulnerability is an incorrect authorization issue found in Synology DiskStation Manager (DSM) before version 6.2.4-25553. This flaw enables local users to execute arbitrary code through unspecified vectors.
The Impact of CVE-2021-26563
With a CVSS base score of 8.2, this vulnerability has a high severity level, affecting confidentiality, integrity, and availability. The attack complexity is low as it can be exploited locally without user interaction, making it a significant security concern.
Technical Details of CVE-2021-26563
Explore the vulnerability's description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability arises due to incorrect authorization in the synoagentregisterd service within Synology DSM, allowing unauthorized code execution by local users.
Affected Systems and Versions
Synology DSM versions prior to 6.2.4-25553 are vulnerable to this exploit, particularly custom installations.
Exploitation Mechanism
The vulnerability can be exploited by local malicious users through unspecified methods to execute arbitrary code on the affected system.
Mitigation and Prevention
Discover the necessary steps to mitigate the risks associated with CVE-2021-26563.
Immediate Steps to Take
Users should update their Synology DSM to version 6.2.4-25553 or newer to address this vulnerability. Additionally, restrict access to ensure only authorized users can interact with the system.
Long-Term Security Practices
Regularly monitor for security updates from Synology and apply patches promptly to safeguard systems against potential threats.
Patching and Updates
Stay informed about security advisories and update mechanisms provided by Synology to protect your infrastructure from known vulnerabilities.