CVE-2019-15624 : Exploit Details and Defense Strategies

Nextcloud Server 15.0.7 has a vulnerability that allows group administrators to create users with identifiers matching system folders, leading to privilege escalation.

Understanding CVE-2019-15624

Nextcloud Server 15.0.7 vulnerability enables group admins to create users with system folder IDs, potentially escalating privileges.

What is CVE-2019-15624?

The vulnerability in Nextcloud Server 15.0.7 allows group administrators to create users with IDs that correspond to system folders, potentially leading to privilege escalation.

The Impact of CVE-2019-15624

Group administrators can exploit this vulnerability to create users with matching system folder IDs, potentially gaining unauthorized access and escalating privileges.

Technical Details of CVE-2019-15624

Nextcloud Server 15.0.7 vulnerability details.

Vulnerability Description

Improper input validation in Nextcloud Server 15.0.7 enables group administrators to create users with IDs of system folders, leading to privilege escalation.

Affected Systems and Versions

Product: Nextcloud Server
Version: 15.0.7

Exploitation Mechanism

Group administrators can exploit the vulnerability by creating users with identifiers that match system folders, potentially gaining unauthorized access.

Mitigation and Prevention

Steps to mitigate and prevent the CVE-2019-15624 vulnerability.

Immediate Steps to Take

Update Nextcloud Server to a patched version that addresses the input validation vulnerability.
Monitor user creation activities for suspicious behavior.

Long-Term Security Practices

Regularly review and update access control policies within Nextcloud Server.
Educate administrators on secure user management practices to prevent privilege escalation.

Patching and Updates

Apply security patches provided by Nextcloud promptly to address the vulnerability and prevent potential exploitation.