An injection formula is a way to embed malicious code or commands into a file or application that is then executed by the target system. This is a type of security vulnerability where attackers exploit the way data is processed and interpreted, often in CSV (Comma Separated Value) files.
The term "injection formula" is often used interchangeably with "CSV Injection" or "Formula Injection". This technique occurs when websites or applications allow untrusted user input to be embedded within CSV files. This input might be interpreted as a formula or command by the application, allowing the attacker to execute arbitrary code or gain unauthorized access to data.
Here's a breakdown:
- How it works: Attackers insert malicious code into a CSV file using formulas or special characters. When the target system opens or processes the CSV file, the malicious code is executed, potentially compromising the system.
- Impact: Formula injection attacks can be used for various malicious purposes, including data exfiltration, system control, and privilege escalation.
- Examples:
- A malicious formula in a CSV file might be used to access and steal sensitive data from a database.
- An attacker could inject code that allows them to remotely control the target system.
Preventing Formula Injection:
- Input Sanitization: This involves carefully validating and filtering user input to prevent malicious code from being injected.
- Escaping Special Characters: This process modifies or escapes any special characters that could be interpreted as formulas or commands.
- Using Secure Libraries: Utilize libraries that are specifically designed to handle and process CSV files securely.
By understanding the risks and implementing appropriate security measures, developers and security professionals can mitigate the threat of formula injection attacks.
