CVE-2017-18049 : Exploit Details and Defense Strategies

SilverStripe versions prior to 3.5.6, 3.6.x before 3.6.3, and 4.x prior to 4.0.1 are vulnerable to executing macros and scripts when CSV exports are imported into software like Microsoft Excel without proper sanitization.

Understanding CVE-2017-18049

This CVE highlights a security issue in SilverStripe versions that could lead to the execution of malicious macros and scripts.

What is CVE-2017-18049?

This vulnerability allows the inclusion of harmful macros and scripts in CSV exports, which can be executed if imported into software like Microsoft Excel without adequate sanitization. An attacker could exploit this by injecting malicious code into the CSV data.

The Impact of CVE-2017-18049

The vulnerability poses a risk of executing unauthorized macros and scripts, potentially leading to security breaches or unauthorized access to systems where the CSV data is imported.

Technical Details of CVE-2017-18049

SilverStripe's CSV export feature is susceptible to the following:

Vulnerability Description

The CSV export feature in affected SilverStripe versions permits the inclusion of macros and scripts in the output.

Affected Systems and Versions

SilverStripe versions prior to 3.5.6, 3.6.x before 3.6.3, and 4.x prior to 4.0.1.

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting malicious macros and scripts into the CSV data, particularly from user inputs like the "First Name" field.

Mitigation and Prevention

To address CVE-2017-18049, consider the following steps:

Immediate Steps to Take

Avoid importing CSV files from untrusted sources into software like Microsoft Excel.
Ensure that all CSV data is properly sanitized before importing.

Long-Term Security Practices

Regularly update SilverStripe to the latest secure version.
Educate users on the risks of importing untrusted CSV files.

Patching and Updates

Apply the necessary patches provided by SilverStripe to fix this vulnerability.