CVE-2017-15879 : Exploit Details and Defense Strategies

KeystoneJS before version 4.0.0-beta.7 is vulnerable to CSV Injection, also known as Excel Macro Injection or Formula Injection, which can be exploited through specific mishandling of values during CSV file exports.

Understanding CVE-2017-15879

This CVE identifies a security vulnerability in KeystoneJS that allows for CSV Injection, potentially leading to malicious code execution.

What is CVE-2017-15879?

CSV Injection, also referred to as Excel Macro Injection or Formula Injection, is present in admin/server/api/download.js and lib/list/getCSVData.js in KeystoneJS versions prior to 4.0.0-beta.7. This flaw arises from mishandling specific values during CSV file exports.

The Impact of CVE-2017-15879

The vulnerability could be exploited by an attacker to inject malicious formulas or macros into CSV files, leading to potential code execution when the manipulated file is opened in applications like Microsoft Excel.

Technical Details of CVE-2017-15879

KeystoneJS's vulnerability to CSV Injection has the following technical aspects:

Vulnerability Description

The flaw arises from incorrect handling of specific values during the CSV export process in admin/server/api/download.js and lib/list/getCSVData.js.

Affected Systems and Versions

Affected Version: KeystoneJS versions before 4.0.0-beta.7

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious formulas or macros into CSV files, which may execute when opened in applications susceptible to such injections.

Mitigation and Prevention

To address CVE-2017-15879, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade KeystoneJS to version 4.0.0-beta.7 or later to mitigate the CSV Injection vulnerability.
Avoid opening CSV files from untrusted sources to prevent potential exploitation.

Long-Term Security Practices

Regularly update software and libraries to ensure the latest security patches are applied.
Educate users on the risks of opening CSV files from unknown or untrusted sources.

Patching and Updates

Apply patches and updates provided by KeystoneJS to address the CSV Injection vulnerability and enhance overall security.