CVE-2021-37629 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-37629 in Nextcloud Richdocuments, learn about affected systems & versions, and find mitigation steps to enhance cybersecurity measures.
A lack of rate limiting on the Richdocuments OCS endpoint in Nextcloud can lead to potential security risks. Upgrading to specified versions or disabling the Richdocuments application is recommended to mitigate the vulnerability.
Understanding CVE-2021-37629
This CVE is related to a vulnerability in Nextcloud Richdocuments that exposes sensitive information due to the absence of rate limiting on the OCS endpoint.
What is CVE-2021-37629?
CVE-2021-37629 highlights a security issue in Nextcloud Richdocuments where an attacker could enumerate valid share tokens due to the lack of rate limiting on the OCS endpoint.
The Impact of CVE-2021-37629
The impact of this CVE is rated as medium severity with low confidentiality impact. It requires no user interaction and has low attack complexity.
Technical Details of CVE-2021-37629
This section delves into the specifics of the vulnerability, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability arises from the absence of rate limiting on the Richdocuments OCS endpoint in affected Nextcloud versions.
Affected Systems and Versions
Nextcloud versions < 3.8.4 and >= 4.0.0, < 4.2.1 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability to potentially enumerate valid share tokens through the Richdocuments OCS endpoint.
Mitigation and Prevention
Explore immediate steps to take and long-term security practices to safeguard against CVE-2021-37629.
Immediate Steps to Take
It is crucial to upgrade Nextcloud Richdocuments to version 3.8.4 or 4.2.1. For users unable to upgrade, disabling the Richdocuments application is the recommended action.
Long-Term Security Practices
Adopt security best practices such as regular software updates, monitoring security advisories, and maintaining a robust cybersecurity posture.
Patching and Updates
Stay informed about security patches released by Nextcloud and promptly apply updates to address vulnerabilities.