CVE-2017-5219 : Exploit Details and Defense Strategies

A vulnerability was found in SageCRM version 7.x prior to 7.3 SP3 that allowed remote interaction with the underlying filesystem at the highest privilege level.

Understanding CVE-2017-5219

What is CVE-2017-5219?

An issue in SageCRM allowed the extraction of files to the filesystem by uploading a zip file containing a valid .ecf component file.

The Impact of CVE-2017-5219

The vulnerability enabled the extraction of a web shell file to the SageCRM webroot, allowing remote interaction with the filesystem at the highest privilege level.

Technical Details of CVE-2017-5219

Vulnerability Description

SageCRM's Component Manager feature permitted the extraction of files to the filesystem outside the webroot.

Affected Systems and Versions

SageCRM version 7.x before 7.3 SP3

Exploitation Mechanism

Uploading a zip file with an empty .ecf file allowed the extraction of any file included in the zip to the filesystem.

Mitigation and Prevention

Immediate Steps to Take

Update SageCRM to version 7.3 SP3 or later.
Regularly monitor and audit uploaded files for malicious content.

Long-Term Security Practices

Implement file upload restrictions and validation checks.
Conduct security training for users on safe file handling practices.

Patching and Updates

Apply security patches and updates provided by SageCRM.