CVE-2019-3786 Explained : Impact and Mitigation

Cloud Foundry BOSH Backup and Restore CLI, prior to version 1.5.0, is vulnerable to arbitrary script execution on deployment VMs.

Understanding CVE-2019-3786

This CVE highlights a security flaw in Cloud Foundry BOSH Backup and Restore CLI that allows authenticated remote attackers to manipulate backup scripts and request additional backup files during the restore process.

What is CVE-2019-3786?

The vulnerability in Cloud Foundry BOSH Backup and Restore CLI allows a malicious authenticated user to modify the metadata file of a Bosh Backup and Restore job, potentially leading to unauthorized access and data manipulation.

The Impact of CVE-2019-3786

The vulnerability poses a high severity risk with a CVSS base score of 7.7, affecting confidentiality and potentially enabling unauthorized access to sensitive data.

Technical Details of CVE-2019-3786

Cloud Foundry BOSH Backup and Restore CLI vulnerability details.

Vulnerability Description

Lack of script authenticity validation in BOSH Backup and Restore CLI
Potential for remote attackers to manipulate backup scripts
Vulnerable versions: All versions prior to 1.5.0

Affected Systems and Versions

Product: BOSH Backup and Restore
Vendor: Cloud Foundry
Versions affected: All versions less than v1.5.0

Exploitation Mechanism

Remote authenticated attackers can modify metadata files to request unauthorized backup files
Exploited hooks present in cfcr-etcd-release

Mitigation and Prevention

Protecting systems from CVE-2019-3786.

Immediate Steps to Take

Upgrade Cloud Foundry BOSH Backup and Restore CLI to version 1.5.0 or higher
Monitor and restrict access to backup and restore processes

Long-Term Security Practices

Regular security assessments and audits of backup procedures
Implement least privilege access controls to limit potential attack surfaces

Patching and Updates

Apply security patches promptly
Stay informed about security updates and best practices