CVE-2019-15011 Explained : Impact and Mitigation

A vulnerability in Atlassian's Application Links allowed non-admin users to access sensitive information due to missing permissions checks.

Understanding CVE-2019-15011

This CVE discloses details about an information exposure vulnerability in Application Links.

What is CVE-2019-15011?

The ListEntityLinksServlet resource in Application Links exposed application link information to non-admin users due to a lack of permissions validation.

The Impact of CVE-2019-15011

The vulnerability could lead to unauthorized access to sensitive data by non-admin users, compromising the confidentiality of the information stored.

Technical Details of CVE-2019-15011

This section provides technical insights into the CVE.

Vulnerability Description

The ListEntityLinksServlet resource in Application Links prior to version 5.0.12 and between specific versions revealed sensitive information to unauthorized users.

Affected Systems and Versions

Application Links versions less than 5.0.12, 5.1.0 to 5.2.11, 5.3.0 to 5.3.7, 5.4.0 to 5.4.13, and 6.0.0 to 6.0.5 were impacted.

Exploitation Mechanism

The vulnerability exploited missing permission checks in the ListEntityLinksServlet resource, allowing non-admin users to view confidential data.

Mitigation and Prevention

Protect your systems from CVE-2019-15011 with these strategies.

Immediate Steps to Take

Update Application Links to versions beyond the specified vulnerable ranges.
Implement strict access controls to limit unauthorized access to sensitive information.

Long-Term Security Practices

Regularly audit and review permissions settings to ensure data confidentiality.
Train users on security best practices to prevent unauthorized data access.

Patching and Updates

Apply patches provided by Atlassian promptly to address the vulnerability and enhance system security.