CVE-2024-55532 Overview
CVE-2024-55532 is an Improper Neutralization of Formula Elements vulnerability (also known as CSV Injection or Formula Injection) affecting the Export CSV feature in Apache Ranger versions prior to 2.6.0. This vulnerability allows attackers to inject malicious formula elements into CSV exports, which can lead to arbitrary code execution when the exported file is opened in spreadsheet applications like Microsoft Excel or LibreOffice Calc.
Critical Impact
Successful exploitation of this vulnerability could allow attackers to execute arbitrary commands on end-user systems when exported CSV files are opened in spreadsheet applications, potentially leading to full system compromise, data theft, or lateral movement within an organization.
Affected Products
- Apache Ranger versions prior to 2.6.0
- Apache Ranger installations using the Export CSV feature
- Environments where users regularly export and open CSV data from Ranger
Discovery Timeline
- 2025-03-03 - CVE CVE-2024-55532 published to NVD
- 2025-05-21 - Last updated in NVD database
Technical Details for CVE-2024-55532
Vulnerability Analysis
This vulnerability falls under CWE-1236 (Improper Neutralization of Formula Elements in a CSV File). Apache Ranger's CSV export functionality fails to properly sanitize user-controlled input before including it in exported CSV files. When cells begin with characters such as =, +, -, or @, spreadsheet applications interpret these as formula prefixes and execute the subsequent content as formulas.
The vulnerability is exploitable over the network without requiring authentication or user interaction beyond opening the malicious CSV file. When a user with access to Apache Ranger exports data containing attacker-controlled values and opens the resulting CSV in a spreadsheet application, the injected formulas are executed with the privileges of the user running the application.
Root Cause
The root cause of CVE-2024-55532 is the lack of input sanitization and output encoding in Apache Ranger's CSV export functionality. The application directly includes user-supplied data in CSV output without escaping or neutralizing formula-initiating characters. This oversight allows attackers to craft data entries that, when exported and opened, execute malicious Dynamic Data Exchange (DDE) payloads or hyperlink-based attacks.
Attack Vector
The attack vector for this vulnerability is network-based. An attacker can inject malicious formula payloads into data fields that are subsequently included in CSV exports. The attack flow typically involves:
- An attacker submits data containing formula injection payloads (e.g., =CMD|'/C calc'!A0) to fields that Apache Ranger stores
- A legitimate user exports data from Apache Ranger using the CSV export feature
- The exported CSV file contains the malicious formula without proper sanitization
- When the user opens the CSV file in a spreadsheet application, the formula executes, potentially running arbitrary system commands
Common payload patterns include DDE commands that launch system processes or formulas that exfiltrate data to attacker-controlled servers via HTTP requests.
Detection Methods for CVE-2024-55532
Indicators of Compromise
- Presence of suspicious data entries in Apache Ranger containing formula-initiating characters (=, +, -, @) followed by command syntax
- Unusual DDE or hyperlink patterns in database records or exported CSV files
- Unexpected process execution originating from spreadsheet applications (Excel, Calc) after opening CSV exports
- Network connections to unknown external hosts initiated by spreadsheet applications
Detection Strategies
- Implement content inspection rules to detect formula injection patterns in data submitted to Apache Ranger
- Monitor for CSV files containing suspicious formula patterns using endpoint detection tools
- Enable SentinelOne's behavioral analysis to detect unusual child processes spawned by spreadsheet applications
- Deploy file integrity monitoring on exported CSV files to identify injected malicious content
Monitoring Recommendations
- Configure logging for Apache Ranger export operations to track which users are exporting CSV data
- Monitor endpoint activity for spreadsheet applications making outbound network connections or spawning command interpreters
- Implement alerting for formula injection patterns in web application firewalls and data loss prevention systems
- Review Apache Ranger audit logs for unusual data entries that may indicate injection attempts
How to Mitigate CVE-2024-55532
Immediate Actions Required
- Upgrade Apache Ranger to version 2.6.0 or later, which contains the fix for this vulnerability
- Review existing data stored in Apache Ranger for potential malicious formula payloads
- Educate users about the risks of opening CSV files from untrusted sources and enabling macros or external content
- Consider implementing application-level sanitization as a defense-in-depth measure until upgrade is complete
Patch Information
Apache has released version 2.6.0 of Apache Ranger which addresses CVE-2024-55532. Users are strongly recommended to upgrade to this version immediately. The fix implements proper neutralization of formula elements in CSV exports by escaping or prefixing potentially dangerous characters. Detailed information about this vulnerability and the fix is available in the Apache Ranger Vulnerabilities Listing.
Workarounds
- Implement input validation to reject data containing formula-initiating characters at data entry points
- Apply output encoding to CSV exports by prefixing cells with a single quote (') or tab character to prevent formula interpretation
- Configure spreadsheet applications to disable automatic execution of DDE links and external content
- Restrict access to the CSV export feature to trusted administrators only until the patch can be applied
# Example: Verify Apache Ranger version
# Check if your installation is vulnerable
ranger-admin version
# If version is below 2.6.0, upgrade is required
# Download and apply the latest Apache Ranger release
wget https://downloads.apache.org/ranger/2.6.0/apache-ranger-2.6.0.tar.gz
# Follow Apache Ranger upgrade documentation for your environment
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
