CVE-2021-32657 : Vulnerability Insights and Analysis
Learn about CVE-2021-32657 affecting Nextcloud Server versions prior to 19.0.11, 20.0.10, and 21.0.2, allowing malicious users to disrupt user administration. Find mitigation steps here.
Nextcloud Server versions prior to 19.0.11, 20.0.10, and 21.0.2 are vulnerable to a user administration page break, allowing malicious users to disrupt user management. The vulnerability has a CVSS base score of 4.3.
Understanding CVE-2021-32657
Nextcloud Server vulnerabilities could enable a malicious user to hinder user administration, affecting proper user management on the platform.
What is CVE-2021-32657?
CVE-2021-32657 affects Nextcloud Server versions before 19.0.11, 20.0.10, and 21.0.2, enabling an attacker to disrupt the user administration page.
The Impact of CVE-2021-32657
The vulnerability in Nextcloud Server versions could be exploited by a malicious user to disrupt user management, affecting administrative tasks.
Technical Details of CVE-2021-32657
The vulnerability is primarily due to uncontrolled resource consumption (CWE-400), leading to a disruption in user administration.
Vulnerability Description
In affected versions, a malicious user can break the user administration page, hindering administrators from managing users on the Nextcloud instance.
Affected Systems and Versions
Nextcloud Server versions < 19.0.11, >= 20.0.0, < 20.0.10, and >= 21.0.0, < 21.0.2 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability over the network with low privileges required, impacting availability without affecting confidentiality or integrity.
Mitigation and Prevention
To mitigate the CVE-2021-32657 vulnerability, users must take immediate steps and follow long-term security practices.
Immediate Steps to Take
Administrators should update Nextcloud Server to versions 19.0.11, 20.0.10, or 21.0.2 to patch the vulnerability. Utilizing the OCC command line tool can also help manage users.
Long-Term Security Practices
Implement security best practices, including regular software updates, security monitoring, and user access controls, to prevent similar vulnerabilities.
Patching and Updates
Regularly check for security advisories and updates from Nextcloud to ensure the platform is protected against known vulnerabilities.