[Lab] Tested with new Amplify workflow #156
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Vulnerabilities Detected
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| // vuln-code-snippet start unionSqlInjectionChallenge dbSchemaChallenge | ||
| module.exports = function searchProducts() { | ||
| return (req: Request, res: Response, next: NextFunction) => { | ||
| let criteria: any = req.query.q === 'undefined' ? '' : req.query.q ?? '' | ||
| criteria = (criteria.length <= 200) ? criteria : criteria.substring(0, 200) | ||
| console.log(criteria) | ||
| models.sequelize.query(`SELECT * FROM Products WHERE ((name LIKE '%${criteria}%' OR description LIKE '%${criteria}%') AND deletedAt IS NULL) ORDER BY name`) |
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Warning
Amplify has been notified that this line contains a vulnerability 🕷️.
Vulnerability: CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Impact: HIGH
Code Fix: ✅
Amplify Security has prepared an automated remediation for review. Click here to review and commit the code fix.
| models.sequelize.query(`SELECT * FROM Products WHERE ((name LIKE '%${criteria}%' OR description LIKE '%${criteria}%') AND deletedAt IS NULL) ORDER BY name`) | |
| models.sequelize.query(`SELECT * FROM Products WHERE ((name LIKE :criteria OR description LIKE :criteria) AND deletedAt IS NULL) ORDER BY name`, { | |
| replacements: { criteria: `%${criteria}%` } | |
| }) |
The code change addresses the SQL Injection vulnerability by implementing parameterized queries instead of directly interpolating user input into the SQL command. Here's how this change mitigates the risk:
Explanation of the Vulnerability
SQL Injection occurs when an attacker is able to manipulate a SQL query by injecting malicious input. In the original code, the user input (criteria) is directly concatenated into the SQL string. This means that if an attacker provides specially crafted input, they could alter the intended SQL command, potentially allowing them to execute arbitrary SQL code.
How the Code Change Fixes the Vulnerability
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Parameterized Queries: The revised code uses a parameterized query with named parameters (
:criteria). This means that the SQL command structure is defined separately from the data being inserted into it. The database engine treats the parameter as a value rather than executable code. -
Replacements Object: The
replacementsobject is used to safely pass the user input (criteria) into the SQL query. This ensures that the input is properly escaped and sanitized, preventing any special characters from being interpreted as part of the SQL command. -
Input Length Limitation: The code still includes a check to limit the length of the
criteriainput to 200 characters. While this is a good practice for performance and security, the main protection against SQL Injection comes from the use of parameterized queries.
Benefits of the Change
- Security: By using parameterized queries, the risk of SQL Injection is significantly reduced, as user input cannot alter the structure of the SQL command.
- Maintainability: Parameterized queries are generally easier to read and maintain, as they separate the SQL logic from the data being processed.
- Performance: Many database systems can optimize parameterized queries better than dynamically constructed queries, potentially improving performance.
Further Reading
For more information on preventing SQL Injection and the benefits of parameterized queries, you can refer to the following resources:
By implementing these changes, the code is now more secure against SQL Injection attacks, ensuring that user input is handled safely.
Note
Have a question or concern about this vulnerability fix? Get an answer within seconds by asking our Concierge 🤖 with @amplify-security.
i.e. @amplify-security are there known performance issues resulting from this fix?
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| // vuln-code-snippet start unionSqlInjectionChallenge dbSchemaChallenge | ||
| module.exports = function searchProducts() { | ||
| return (req: Request, res: Response, next: NextFunction) => { | ||
| let criteria: any = req.query.q === 'undefined' ? '' : req.query.q ?? '' | ||
| criteria = (criteria.length <= 200) ? criteria : criteria.substring(0, 200) | ||
| console.log(criteria) | ||
| models.sequelize.query(`SELECT * FROM Products WHERE ((name LIKE '%${criteria}%' OR description LIKE '%${criteria}%') AND deletedAt IS NULL) ORDER BY name`) |
There was a problem hiding this comment.
Warning
Amplify has been notified that this line contains a vulnerability 🕷️.
Vulnerability: CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Impact: MEDIUM
Code Fix: ✅
Amplify Security has prepared an automated remediation for review. Click here to review and commit the code fix.
| models.sequelize.query(`SELECT * FROM Products WHERE ((name LIKE '%${criteria}%' OR description LIKE '%${criteria}%') AND deletedAt IS NULL) ORDER BY name`) | |
| models.sequelize.query(`SELECT * FROM Products WHERE ((name LIKE :criteria OR description LIKE :criteria) AND deletedAt IS NULL) ORDER BY name`, { | |
| replacements: { criteria: `%${criteria}%` } | |
| }) |
The code change addresses the SQL Injection vulnerability by using parameterized queries instead of directly interpolating user input into the SQL command. Here's how this change mitigates the risk:
Explanation of the Vulnerability
SQL Injection occurs when an attacker is able to manipulate a SQL query by injecting malicious SQL code through user input. In the original code, the criteria variable is directly concatenated into the SQL query string. This means that if a user inputs a specially crafted string, they could alter the intended SQL command, potentially gaining unauthorized access to data or executing harmful operations on the database.
How the Code Change Fixes the Vulnerability
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Use of Parameterized Queries: The modified code uses a parameterized query with named placeholders (in this case,
:criteria). This means that the SQL command is defined separately from the data being inserted into it. The database driver treats the input as a literal value rather than executable code. -
Replacements Object: The
replacementsobject is used to safely bind the user input to the SQL command. By doing this, the input is sanitized, and any special characters that could be used for SQL injection are neutralized. The database engine ensures that the input is treated as data, not as part of the SQL command. -
Length Limitation: The original code already included a length check on the
criteriainput, limiting it to 200 characters. This is a good practice, but it is not sufficient on its own to prevent SQL injection. The change to parameterized queries is a more robust solution.
Conclusion
By switching to parameterized queries, the code change effectively prevents SQL injection attacks by ensuring that user input cannot alter the structure of the SQL command. This approach is widely recommended in secure coding practices and is documented in various resources, including:
These resources provide further insights into secure coding practices and the importance of using parameterized queries to protect against SQL injection vulnerabilities.
Note
Have a question or concern about this vulnerability fix? Get an answer within seconds by asking our Concierge 🤖 with @amplify-security.
i.e. @amplify-security are there known performance issues resulting from this fix?
Description
A clear and concise summary of the change and which issue (if any) it fixes. Should also include relevant motivation and context.
Resolved or fixed issue:
Affirmation