CVE-2020-27629 : Exploit Details and Defense Strategies

In JetBrains TeamCity before 2020.1.5, secure dependency parameters could be not masked in depending builds when there are no internal artifacts.

Understanding CVE-2020-27629

In this CVE, JetBrains TeamCity before version 2020.1.5 is affected by a vulnerability related to secure dependency parameters.

What is CVE-2020-27629?

The vulnerability in JetBrains TeamCity allows secure dependency parameters to remain unmasked in dependent builds if there are no internal artifacts present.

The Impact of CVE-2020-27629

This vulnerability could potentially expose sensitive information contained in secure dependency parameters to unauthorized users, leading to a security breach.

Technical Details of CVE-2020-27629

JetBrains TeamCity before 2020.1.5 is susceptible to the following technical details:

Vulnerability Description

The issue arises from the failure to mask secure dependency parameters in dependent builds lacking internal artifacts.

Affected Systems and Versions

Product: JetBrains TeamCity
Vendor: JetBrains
Versions affected: All versions before 2020.1.5

Exploitation Mechanism

Attackers could exploit this vulnerability by accessing dependent builds without internal artifacts, potentially revealing sensitive information.

Mitigation and Prevention

To address CVE-2020-27629, consider the following mitigation strategies:

Immediate Steps to Take

Update JetBrains TeamCity to version 2020.1.5 or later to mitigate the vulnerability.
Implement access controls to restrict unauthorized users from viewing dependency parameters.

Long-Term Security Practices

Regularly monitor and audit dependency parameters and their visibility in builds.
Educate users on secure handling of sensitive information within the TeamCity environment.

Patching and Updates

Stay informed about security bulletins and updates from JetBrains to promptly apply patches and fixes.