CVE-2020-36252 : Vulnerability Insights and Analysis

ownCloud Server 10.x before 10.3.1 allows an attacker, who has one outgoing share from a victim, to access any version of any file by sending a request for a predictable ID number.

Understanding CVE-2020-36252

This CVE involves a vulnerability in ownCloud Server that enables unauthorized access to file versions.

What is CVE-2020-36252?

The vulnerability in ownCloud Server 10.x before version 10.3.1 allows an attacker with one outgoing share from a victim to retrieve any file version by exploiting a predictable ID number.

The Impact of CVE-2020-36252

The impact of this vulnerability is rated as medium severity with high confidentiality impact. It requires low privileges and no user interaction, affecting the integrity of the system.

Technical Details of CVE-2020-36252

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in ownCloud Server allows unauthorized access to any file version by exploiting a predictable ID number.

Affected Systems and Versions

Product: ownCloud Server 10.x
Versions affected: Before 10.3.1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Adjacent Network
Privileges Required: Low
User Interaction: None
Scope: Changed
Vector String: CVSS:3.1/AC:L/AV:A/A:N/C:H/I:N/PR:L/S:C/UI:N

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade ownCloud Server to version 10.3.1 or later to mitigate the vulnerability.
Monitor and restrict outgoing shares to prevent unauthorized access.

Long-Term Security Practices

Regularly update and patch ownCloud Server to address security flaws.
Educate users on secure file sharing practices to minimize risks.

Patching and Updates

Ensure timely installation of security patches and updates to stay protected from known vulnerabilities.