CVE-2019-20097 : Vulnerability Insights and Analysis

Bitbucket Server and Bitbucket Data Center versions prior to 5.16.11, 6.0.11, 6.1.9, 6.2.7, 6.3.6, 6.4.4, 6.5.3, 6.6.3, 6.7.3, 6.8.2, and 6.9.1 are vulnerable to remote code execution through the post-receive hook.

Understanding CVE-2019-20097

This CVE identifies a critical vulnerability in Bitbucket Server and Bitbucket Data Center instances that could allow an attacker to execute arbitrary commands on affected systems.

What is CVE-2019-20097?

CVE-2019-20097 is a security vulnerability found in Bitbucket Server and Bitbucket Data Center versions prior to specific releases. It enables remote code execution through the post-receive hook, potentially leading to unauthorized access and control of the affected systems.

The Impact of CVE-2019-20097

The vulnerability in Bitbucket Server and Bitbucket Data Center could be exploited by external attackers with repository permissions to clone and push files. By leveraging specially crafted content in a file, attackers can execute arbitrary commands on the targeted instances, compromising system integrity and data security.

Technical Details of CVE-2019-20097

Bitbucket Server and Bitbucket Data Center versions before the specified releases are susceptible to this vulnerability.

Vulnerability Description

The flaw allows remote code execution through the post-receive hook, enabling attackers to execute arbitrary commands on the affected systems.

Affected Systems and Versions

Bitbucket Server versions 1.0 to 6.9.0
Bitbucket Data Center versions 1.0 to 6.9.0

Exploitation Mechanism

Attackers with permissions to clone and push files to a repository on the targeted Bitbucket Server or Bitbucket Data Center instance can exploit this vulnerability using specially crafted content in a file.

Mitigation and Prevention

To address CVE-2019-20097, immediate actions and long-term security practices are crucial.

Immediate Steps to Take

Upgrade Bitbucket Server and Bitbucket Data Center to the patched versions immediately.
Monitor repositories for any suspicious activities or unauthorized access.
Restrict repository permissions to minimize the attack surface.

Long-Term Security Practices

Regularly update and patch Bitbucket Server and Bitbucket Data Center to mitigate future vulnerabilities.
Implement strong access controls and authentication mechanisms to prevent unauthorized access.
Conduct security audits and penetration testing to identify and address potential security gaps.

Patching and Updates

Apply the latest security patches provided by Atlassian for Bitbucket Server and Bitbucket Data Center.
Stay informed about security advisories and updates from Atlassian to ensure timely protection against emerging threats.