CVE-2019-15042 : Vulnerability Insights and Analysis

In JetBrains TeamCity 2018.2.4, a vulnerability was found where certain external https connections were not subjected to SSL certificate validation. This security flaw was addressed and resolved in the subsequent version, TeamCity 2019.1.

Understanding CVE-2019-15042

This CVE describes a security vulnerability in JetBrains TeamCity versions 2018.2.4 and earlier.

What is CVE-2019-15042?

CVE-2019-15042 is a vulnerability in JetBrains TeamCity 2018.2.4 that allowed certain external https connections to bypass SSL certificate validation.

The Impact of CVE-2019-15042

This vulnerability could potentially expose users to man-in-the-middle attacks and unauthorized access to sensitive data transmitted over insecure connections.

Technical Details of CVE-2019-15042

JetBrains TeamCity 2018.2.4 was affected by the following:

Vulnerability Description

The vulnerability in TeamCity 2018.2.4 allowed external https connections to proceed without proper SSL certificate validation, posing a security risk.

Affected Systems and Versions

Product: JetBrains TeamCity
Versions affected: 2018.2.4 and prior

Exploitation Mechanism

Attackers could exploit this vulnerability by intercepting unvalidated https connections to potentially eavesdrop on sensitive information.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-15042:

Immediate Steps to Take

Upgrade to the patched version, TeamCity 2019.1, or a later release.
Ensure SSL certificate validation is enforced for all external https connections.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Implement network monitoring and encryption protocols to enhance data security.

Patching and Updates

JetBrains addressed this vulnerability in TeamCity 2019.1, which includes the necessary security fixes.