CVE-2021-43926 Explained : Impact and Mitigation
Learn about CVE-2021-43926, a SQL Injection flaw in Synology DiskStation Manager (DSM) allowing remote attackers to execute SQL commands via Log Management. Find mitigation steps here.
A SQL Injection vulnerability in Synology DiskStation Manager (DSM) before version 7.0.1-42218-2 allows remote attackers to execute SQL commands.
Understanding CVE-2021-43926
This CVE pertains to a security flaw in Synology DiskStation Manager (DSM) that enables SQL Injection attacks through unspecified vectors.
What is CVE-2021-43926?
The CVE-2021-43926 vulnerability involves improper neutralization of special elements in SQL commands within the Log Management feature in Synology DSM.
The Impact of CVE-2021-43926
The vulnerability allows remote attackers to inject malicious SQL commands, potentially leading to data breaches, unauthorized access, or data manipulation.
Technical Details of CVE-2021-43926
This section provides detailed technical insights into the CVE-2021-43926 vulnerability.
Vulnerability Description
A lack of proper input sanitization in the Log Management functionality of Synology DSM enables attackers to insert SQL commands, posing a severe risk to data integrity and confidentiality.
Affected Systems and Versions
- Product: Synology DiskStation Manager (DSM)
- Vendor: Synology
- Versions Affected: Before 7.0.1-42218-2 (custom versions)
Exploitation Mechanism
The vulnerability is exploited by sending crafted SQL injection commands to vulnerable Synology DSM instances over the network.
Mitigation and Prevention
Measures to address and prevent exploitation of CVE-2021-43926.
Immediate Steps to Take
- Update Synology DSM to version 7.0.1-42218-2 or later.
- Restrict network access to critical systems.
- Monitor and analyze SQL queries for abnormalities or malicious patterns.
Long-Term Security Practices
- Implement strict input validation and sanitization mechanisms.
- Conduct regular security audits and penetration testing.
- Educate users and administrators on SQL injection risks.
Patching and Updates
Regularly check for updates and patches released by Synology for DSM, ensuring that security fixes for vulnerabilities like CVE-2021-43926 are promptly applied.