CVE-2021-31915 : What You Need to Know

In JetBrains TeamCity before 2020.2.4, OS command injection leading to remote code execution was possible.

Understanding CVE-2021-31915

This CVE identifies a vulnerability in JetBrains TeamCity that allowed for OS command injection leading to remote code execution.

What is CVE-2021-31915?

CVE-2021-31915 is a security vulnerability in JetBrains TeamCity that existed before version 2020.2.4. It enabled attackers to execute arbitrary remote code through OS command injection.

The Impact of CVE-2021-31915

The vulnerability in JetBrains TeamCity posed a significant risk as attackers could exploit it to execute malicious code remotely, potentially leading to unauthorized access and control over affected systems.

Technical Details of CVE-2021-31915

Below are the technical details of the CVE:

Vulnerability Description

The vulnerability allowed for OS command injection in JetBrains TeamCity before version 2020.2.4, enabling remote code execution.

Affected Systems and Versions

All versions of JetBrains TeamCity before 2020.2.4 were affected by this vulnerability.

Exploitation Mechanism

Attackers could leverage the OS command injection flaw to inject and execute malicious commands on the target system, thereby gaining unauthorized access.

Mitigation and Prevention

To address CVE-2021-31915, follow these mitigation and prevention steps:

Immediate Steps to Take

Update JetBrains TeamCity to version 2020.2.4 or newer to mitigate the vulnerability.
Restrict network access to vulnerable systems to limit exposure to potential attacks.

Long-Term Security Practices

Implement secure coding practices to prevent command injection vulnerabilities in software.
Regularly monitor security bulletins and updates from JetBrains to stay informed about security patches.

Patching and Updates

Apply security patches and updates released by JetBrains promptly to protect your systems from known vulnerabilities.