CVE-2021-40537 : Vulnerability Insights and Analysis

Server Side Request Forgery (SSRF) vulnerability exists in owncloud/user_ldap < 0.15.4 in the settings of the user_ldap app. Administration role is necessary for exploitation.

Understanding CVE-2021-40537

OwnCloud/user_ldap < 0.15.4 is affected by an SSRF vulnerability that requires an administration role for exploitation.

What is CVE-2021-40537?

CVE-2021-40537 is a Server Side Request Forgery vulnerability present in the settings of the user_ldap app in ownCloud versions below 0.15.4.

The Impact of CVE-2021-40537

This vulnerability could allow an attacker with an administration role to perform SSRF attacks, potentially leading to unauthorized access or data leakage.

Technical Details of CVE-2021-40537

OwnCloud/user_ldap < 0.15.4 is vulnerable to SSRF attacks due to insufficient input validation in user_ldap app settings.

Vulnerability Description

The SSRF vulnerability allows an attacker to make arbitrary requests on behalf of the server.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: < 0.15.4

Exploitation Mechanism

To exploit this vulnerability, an attacker needs an administration role in the ownCloud application.

Mitigation and Prevention

It is important to take immediate steps to secure systems and implement long-term security practices.

Immediate Steps to Take

Update ownCloud to version 0.15.4 or above.
Limit user permissions to reduce the impact of potential SSRF attacks.

Long-Term Security Practices

Regularly review and update access control policies.
Conduct security training for administrators and users to raise awareness about SSRF vulnerabilities.
Monitor and log network requests to detect and respond to suspicious activities.
Implement content security policies to mitigate SSRF risks.

Patching and Updates

Ensure all systems are updated with the latest patches and security fixes.