CVE-2019-15000 : What You Need to Know

In Bitbucket Server and Data Center versions prior to 5.16.10, 6.0.0 through 6.0.10, 6.1.0 through 6.1.8, 6.2.0 through 6.2.6, 6.3.0 through 6.3.5, 6.4.0 through 6.4.3, and 6.5.0 through 6.5.2, a vulnerability exists in the commit diff rest endpoint allowing remote attackers to read arbitrary files and execute commands.

Understanding CVE-2019-15000

This CVE identifies a security vulnerability in Bitbucket Server and Data Center versions.

What is CVE-2019-15000?

The vulnerability in the commit diff rest endpoint of Bitbucket Server and Data Center versions allows attackers to read system files and execute commands by injecting additional arguments into git commands.

The Impact of CVE-2019-15000

The vulnerability enables remote attackers with repository access to read arbitrary files on the system and execute commands if public access is enabled for a project or repository.

Technical Details of CVE-2019-15000

This section provides detailed technical information about the CVE.

Vulnerability Description

The commit diff rest endpoint in affected Bitbucket Server and Data Center versions allows unauthorized access to system files and command execution through injected arguments.

Affected Systems and Versions

Bitbucket Server versions prior to 5.16.10, 6.0.0 through 6.0.10, 6.1.0 through 6.1.8, 6.2.0 through 6.2.6, 6.3.0 through 6.3.5, 6.4.0 through 6.4.3, and 6.5.0 through 6.5.2
Bitbucket Data Center versions matching the above affected versions

Exploitation Mechanism

Attackers with repository access can exploit the vulnerability by injecting additional arguments into git commands, allowing them to read arbitrary files and execute commands.

Mitigation and Prevention

Protect your systems from CVE-2019-15000 with the following steps:

Immediate Steps to Take

Update Bitbucket Server and Data Center to the fixed versions.
Disable public access for projects and repositories if not required.
Monitor for any unauthorized access or unusual activities.

Long-Term Security Practices

Regularly update and patch Bitbucket Server and Data Center.
Implement access controls and permissions to limit exposure to vulnerabilities.
Conduct security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Apply the necessary patches provided by Atlassian to address the vulnerability in affected versions.