CVE-2023-25817 : Vulnerability Insights and Analysis
Learn about CVE-2023-25817, a Nextcloud server vulnerability allowing unauthorized file deletions. Low CVSS score, user interaction needed. Mitigate by upgrading to version 24.0.9.
This CVE involves a vulnerability in Nextcloud server, specifically related to the improper preservation of permissions when creating a public share. It has a low CVSS base score of 3.5, with low impact on availability and no impact on confidentiality or integrity. The vulnerability requires low privileges and user interaction is required for exploitation.
Understanding CVE-2023-25817
The vulnerability in Nextcloud server allows a user to escalate their permissions to delete files that were meant to be only viewed or downloaded without the proper permissions in versions prior to 24.0.9.
What is CVE-2023-25817?
CVE-2023-25817 is a vulnerability within Nextcloud server that could potentially allow unauthorized users to delete files they were not supposed to have the ability to delete.
The Impact of CVE-2023-25817
The impact of this vulnerability is that it can lead to unauthorized deletion of files, compromising data confidentiality and integrity within the Nextcloud server environment.
Technical Details of CVE-2023-25817
This vulnerability falls under CWE-281: Improper Preservation of Permissions.
Vulnerability Description
In versions of Nextcloud server from 24.0.0 to before 24.0.9, users could exploit this vulnerability to delete files they were not authorized to delete.
Affected Systems and Versions
The affected systems include Nextcloud server versions ranging from 24.0.0 to below 24.0.9.
Exploitation Mechanism
The vulnerability can be exploited by manipulating the permissions during the creation of a public share, allowing users to delete files they shouldn't have access to.
Mitigation and Prevention
To address CVE-2023-25817, it is crucial to take immediate steps to mitigate the risks and prevent unauthorized access to files within the Nextcloud server environment.
Immediate Steps to Take
Upgrade the Nextcloud server to version 24.0.9 to patch the vulnerability and prevent unauthorized deletion of files.
Long-Term Security Practices
Regularly update the Nextcloud server to the latest versions to ensure that security vulnerabilities are promptly addressed and mitigated.
Patching and Updates
It is recommended to stay informed about security advisories related to Nextcloud server and promptly apply patches and updates to mitigate vulnerabilities and enhance overall security posture.