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⏳ I'm reviewing this pull request for security vulnerabilities and code quality issues. I'll provide an update when I'm done |
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Summary of Changes
Hello @branedev2, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request adds a significant collection of Java source code files primarily focused on demonstrating various application security vulnerabilities. These files are part of a benchmark project, providing concrete examples of insecure coding practices and their potential mitigations across different Java APIs and frameworks. The aim is to enrich the existing benchmark dataset for security testing and analysis.
Highlights
- New Security Benchmark Files: This pull request introduces a comprehensive set of Java files designed to demonstrate various security vulnerabilities, likely for benchmarking or testing purposes. These files cover a wide array of common weaknesses.
- Diverse Vulnerability Coverage: The added files include examples of SQL Injection (JDBC, JPA, JDO, Spring JdbcTemplate), Cross-Site Scripting (XSS), OS Command Injection (Runtime.exec, ProcessBuilder), Path Traversal, LDAP Injection, Server-Side Request Forgery (SSRF), Code Injection (GroovyShell, EL, ScriptEngine), Weak Cryptography (DESede, MD5, SHA-1, weak random), Insecure File Permissions, CRLF Injection in logs, and more.
- Utility and Helper Classes: Several helper classes are included to support the benchmark tests, such as
Utils.javafor common operations,DatabaseHelper.javafor database interactions,LDAPManager.javafor LDAP operations, andPropertiesManager.javafor configuration management. These utilities often serve as sinks or sources for the vulnerabilities demonstrated. - Vulnerable and Safe Code Patterns: Each vulnerability demonstration typically includes both 'bad' (vulnerable) and 'ok' (safe/mitigated) code patterns, providing clear examples for security analysis and education.
- CWE Mapping and Summary: A
VULNERABILITY_SUMMARY.mdfile is added, detailing the CWE coverage of the new Java files, mapping them to the Top 25 Most Dangerous Software Weaknesses (2023 CWE Top 25).
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Code Review
This pull request adds a large number of Java files, many of which are part of a security benchmark and contain intentional vulnerabilities. My review has identified numerous critical security flaws, including SQL injection, command injection, path traversal, and the use of weak cryptography. I have also pointed out significant code quality issues such as resource leaks and thread-safety problems. It is crucial that these vulnerabilities are understood and that this code is not used in a production environment without significant remediation.
| System.out.println("Hello"); | ||
| // {fact rule=sql-injection@v1.0 defects=1} | ||
| // ruleid:jdbc-sql-formatted-string | ||
| int count = jdbc.queryForObject("select count(*) from Users where name = '"+paramName+"'", Integer.class); |
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This code is vulnerable to SQL Injection. The paramName request parameter is directly concatenated into the SQL query string. An attacker can manipulate this parameter to alter the SQL query and execute arbitrary commands. Use PreparedStatement with parameter markers (?) to safely handle user input.
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| // Prepare the cipher to encrypt | ||
| // ruleid: desede-is-deprecated | ||
| javax.crypto.SecretKey key = javax.crypto.KeyGenerator.getInstance("DES").generateKey(); |
| /* | ||
| * A utility method used by the generated Java Cipher test cases. | ||
| */ | ||
| private static Cipher cipher = null; |
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Cipher objects are not thread-safe. Storing a Cipher instance in a static field and sharing it across multiple threads without proper synchronization can lead to race conditions and unpredictable behavior, such as incorrect encryption or decryption. A new Cipher instance should be created for each operation, or access to the shared instance must be synchronized.
| SSLConnectionSocketFactory sslsf = | ||
| new SSLConnectionSocketFactory( | ||
| sslcontext, new String[] {"TLSv1"}, null, NoopHostnameVerifier.INSTANCE); |
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The use of TLSv1 is insecure and deprecated. This protocol version has known vulnerabilities. Use modern, secure protocols like TLSv1.2 or TLSv1.3. Additionally, NoopHostnameVerifier disables hostname verification, making the connection vulnerable to Man-in-the-Middle (MITM) attacks. Remove this to enforce proper certificate validation.
| private static Statement stmt; | ||
| private static Connection conn; |
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Using static fields for Connection and Statement objects is a major anti-pattern in a multi-threaded environment like a web application. These objects are not thread-safe and sharing them will lead to race conditions, data corruption, and unpredictable behavior. Each thread or request should acquire its own Connection and Statement and close them in a finally block or using a try-with-resources statement.
| if (param == null) param = ""; | ||
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| // ruleid: weak-random | ||
| float rand = new java.util.Random().nextFloat(); |
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java.util.Random is a pseudo-random number generator (PRNG) that is not cryptographically secure. Using it for security-sensitive values like a "remember me" cookie key makes the values predictable. An attacker could potentially guess the cookie value and hijack user sessions. Use java.security.SecureRandom for all security-related purposes.
| public static String badHash(String password) throws NoSuchAlgorithmException, UnsupportedEncodingException { | ||
| MessageDigest md = MessageDigest.getInstance("SHA-1"); | ||
| byte[] resultBytes = md.digest(password.getBytes("UTF-8")); | ||
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| StringBuilder stringBuilder = new StringBuilder(); | ||
| for (byte b : resultBytes) { | ||
| stringBuilder.append(Integer.toHexString(b & 0xFF)); | ||
| } |
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The byte-to-hex conversion logic is flawed. Integer.toHexString(b & 0xFF) does not pad single-digit hex values with a leading zero (e.g., a byte with value 10 becomes a instead of 0a). This can lead to ambiguous hex string representations for different byte arrays, which can break security mechanisms that rely on consistent hash representations.
| // {fact rule=coral-csrf-rule@v1.0 defects=1} | ||
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| // ruleid: unrestricted-request-mapping | ||
| @RequestMapping("/path") |
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This @RequestMapping does not specify an HTTP method, so it will respond to all methods, including GET. If the writeData method performs any state-changing operation (e.g., creating, updating, or deleting data), it becomes vulnerable to Cross-Site Request Forgery (CSRF). State-changing operations should be restricted to methods like POST, PUT, or DELETE.
| // {fact rule=log-injection@v1.0 defects=1} | ||
| // ruleid: crlf-injection-logs | ||
| String param = request.getParameter("param"); | ||
| log.info("foo"+param+"bar"); |
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This code is vulnerable to Log Injection (or CRLF Injection). The param variable from the request is logged without being sanitized. An attacker can inject newline characters (\r\n) into the parameter to forge new log entries, which can be used to mislead administrators, cover up malicious activity, or inject malicious content into log analysis tools.
| if (httpRequest.getRequestURI().endsWith(".seam")) { | ||
| // {fact rule=code-injection@v1.0 defects=1} | ||
| // ruleid: seam-log-injection | ||
| log.info("request: method="+httpRequest.getMethod()+", URL="+httpRequest.getRequestURI()); |
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| // Privileged code goes here, for example: | ||
| System.loadLibrary("awt"); | ||
| return null; // nothing to return | ||
| } |
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Caution
Description: We observed that you have marked your code as privileged by implementing PrivilegedAction<Void> or by passing your method into AccessController.doPrivileged. Marking code as privileged enables a piece of trusted code to temporarily enable access to more resources than are available directly to the code. Be very careful in your use of the privileged construct, and always remember to make the privileged code section as small as possible.
Severity: Critical
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The fix wraps the privileged code in an AccessController.doPrivileged() call, which limits the scope of the privileged action to only the necessary code. This ensures that the privileged access is confined to the smallest possible section of code, reducing potential security risks.
| } | |
| // import java.security.AccessController; | |
| // import java.security.PrivilegedAction; | |
| public Void run() { | |
| return AccessController.doPrivileged(new PrivilegedAction<Void>() { | |
| public Void run() { | |
| // Privileged code goes here, for example: | |
| System.loadLibrary("awt"); | |
| return null; // nothing to return | |
| } | |
| }); | |
| } |
| Call tableName = null; | ||
| // {fact rule=sql-injection@v1.0 defects=0} | ||
| // ok:formatted-sql-string | ||
| stmt.execute("DROP TABLE " + tableName); |
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Caution
Description: Potential SQL injection vulnerability in the tableConcat method due to unsanitized input. Use prepared statements or parameterized queries instead of string concatenation for SQL commands.
Severity: Critical
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The fix addresses the SQL injection vulnerability in the tableConcat method by replacing string concatenation with parameterized queries. The execute method is modified to use placeholders (?) for the table name, which will be safely substituted by the database driver. This approach prevents malicious input from being interpreted as part of the SQL command, effectively mitigating the risk of SQL injection.
| stmt.execute("DROP TABLE " + tableName); | |
| Call tableName = null; | |
| // {fact rule=sql-injection@v1.0 defects=0} | |
| // ok:formatted-sql-string | |
| stmt.execute("DROP TABLE ?", tableName); | |
| stmt.execute("CREATE TABLE ?", tableName); | |
| } | |
| // {/fact} | |
| } |
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| class Test { | ||
| @GetMapping | ||
| public void drive(@RequestParam("input") String userInput) { |
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Caution
Description: Your code is using a vulnerable version of the Spring Framework that contains a remote code execution vulnerability exploitable through malicious HTTP requests. This poses a significant security risk as attackers can gain complete control of affected systems, potentially leading to data breaches, service disruption, or further network compromise. To remediate this issue, update to the latest patched version of Spring Framework (specific version depends on which CVE is affecting your installation) and consider implementing additional security layers such as web application firewalls that can detect and block malicious HTTP requests.
Severity: Critical
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The remediation replaces unsafe query methods with parameterized queries using NamedParameterJdbcTemplate and MapSqlParameterSource. This prevents SQL injection by separating the SQL query structure from user input data.
| public void drive(@RequestParam("input") String userInput) { | |
| // import org.springframework.jdbc.core.namedparam.MapSqlParameterSource; | |
| // import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate; | |
| // These imports are needed for using parameterized queries to prevent SQL injection. | |
| @GetMapping | |
| public void drive(@RequestParam("input") String userInput) { | |
| NamedParameterJdbcTemplate namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(new JdbcTemplate()); | |
| MapSqlParameterSource paramSource = new MapSqlParameterSource(); | |
| paramSource.addValue("userInput", userInput); | |
| // Replace all unsafe query methods with parameterized queries | |
| namedParameterJdbcTemplate.query("SELECT * FROM table WHERE column = :userInput", paramSource, (rs, rowNum) -> null); | |
| namedParameterJdbcTemplate.queryForObject("SELECT * FROM table WHERE column = :userInput", paramSource, String.class); | |
| namedParameterJdbcTemplate.queryForList("SELECT * FROM table WHERE column = :userInput", paramSource); | |
| namedParameterJdbcTemplate.queryForMap("SELECT * FROM table WHERE column = :userInput", paramSource); | |
| namedParameterJdbcTemplate.queryForRowSet("SELECT * FROM table WHERE column = :userInput", paramSource); | |
| // Remove or replace other unsafe methods with appropriate parameterized alternatives | |
| } |
| // {fact rule=improper-privilege-management@v1.0 defects=1} | ||
| // Become privileged: | ||
| // ruleid: do-privileged-use | ||
| AccessController.doPrivileged(mya); |
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Caution
Description: We observed that you have marked your code as privileged by implementing PrivilegedAction<Void> or by passing your method into AccessController.doPrivileged. Marking code as privileged enables a piece of trusted code to temporarily enable access to more resources than are available directly to the code. Be very careful in your use of the privileged construct, and always remember to make the privileged code section as small as possible.
Severity: Critical
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The fix minimizes the scope of privileged actions by wrapping only the necessary code within the doPrivileged blocks, reducing the potential for security vulnerabilities.
| AccessController.doPrivileged(mya); | |
| public void somemethod() { | |
| MyAction mya = new MyAction(); | |
| // Perform privileged action with minimal scope | |
| AccessController.doPrivileged(new PrivilegedAction<Void>() { | |
| public Void run() { | |
| mya.run(); | |
| return null; | |
| } | |
| }); | |
| // Anonymous class with minimal privileged scope | |
| AccessController.doPrivileged(new PrivilegedAction<Void>() { | |
| public Void run() { | |
| System.loadLibrary("awt"); | |
| return null; | |
| } | |
| }); | |
| // Lambda expression with minimal privileged scope | |
| AccessController.doPrivileged((PrivilegedAction<Void>) () -> { | |
| System.loadLibrary("awt"); | |
| return null; | |
| }); | |
| } |
| // {fact rule=sql-injection@v1.0 defects=1} | ||
| // ruleid:jpa-sqli | ||
| TypedQuery<UserEntity> q = em.createQuery( | ||
| String.format("select * from Users where name = %s", username), |
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Caution
Description: SQL injection vulnerability in getUserByUsername and getUserByUsernameAlt2 methods due to unsanitized user input. Use parameterized queries with JPA to prevent SQL injection. Replace String concatenation with query parameters.
Severity: Critical
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The fix addresses the SQL injection vulnerability in both getUserByUsername and getUserByUsernameAlt2 methods by replacing the string concatenation with parameterized queries. The JPQL query now uses a named parameter :username, and the setParameter method is used to safely bind the user input to the query, preventing SQL injection attacks.
| String.format("select * from Users where name = %s", username), | |
| class JpaSql { | |
| public void getUserByUsername(EntityManager em, @RequestParam String username) { | |
| // {fact rule=sql-injection@v1.0 defects=1} | |
| // ruleid:jpa-sqli | |
| TypedQuery<UserEntity> q = em.createQuery( | |
| "SELECT u FROM UserEntity u WHERE u.name = :username", | |
| UserEntity.class); | |
| q.setParameter("username", username); | |
| UserEntity res = q.getSingleResult(); | |
| } | |
| // {/fact} | |
| public void getUserByUsernameAlt2(EntityManager em, @RequestParam String username) { | |
| // {fact rule=sql-injection@v1.0 defects=1} | |
| // ruleid:jpa-sqli | |
| TypedQuery<UserEntity> q = em.createQuery( | |
| "SELECT u FROM UserEntity u WHERE u.name = :username", | |
| UserEntity.class); | |
| q.setParameter("username", username); | |
| UserEntity res = q.getSingleResult(); | |
| } |
| // URL Decode the header value since req.getHeader() doesn't. Unlike req.getParameter(). | ||
| param = java.net.URLDecoder.decode(param, "UTF-8"); | ||
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| String sql = "{call " + param + "}"; |
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Caution
Description: SQL injection vulnerability due to unsanitized user input directly used in SQL query. Use parameterized queries or prepared statements to prevent SQL injection.
Severity: Critical
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The fix addresses the SQL injection vulnerability by using a parameterized query instead of directly concatenating user input into the SQL string. The SQL statement now uses a placeholder '?' for the parameter, and the user input is set using the setString() method of the CallableStatement. This approach ensures that the user input is properly escaped and treated as data, not as part of the SQL command, thus preventing SQL injection attacks.
| String sql = "{call " + param + "}"; | |
| // URL Decode the header value since req.getHeader() doesn't. Unlike req.getParameter(). | |
| param = java.net.URLDecoder.decode(param, "UTF-8"); | |
| String sql = "{call ?}"; | |
| try { | |
| java.sql.Connection connection = | |
| org.owasp.benchmark.helpers.DatabaseHelper.getSqlConnection(); | |
| // {fact rule=sql-injection@v1.0 defects=1} | |
| // ruleid: tainted-sql-from-http-request | |
| java.sql.CallableStatement statement = connection.prepareCall(sql); | |
| statement.setString(1, param); | |
| java.sql.ResultSet rs = statement.executeQuery(); | |
| org.owasp.benchmark.helpers.DatabaseHelper.printResults(rs, sql, response); | |
| } catch (java.sql.SQLException e) { |
| class TestJpa { | ||
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| @GetMapping | ||
| public void drive(@RequestParam("input") String userInput, |
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Caution
Description: Your code is using a vulnerable version of the Spring Framework that contains a remote code execution vulnerability exploitable through malicious HTTP requests. This poses a significant security risk as attackers can gain complete control of affected systems, potentially leading to data breaches, service disruption, or further network compromise. To remediate this issue, update to the latest patched version of Spring Framework (specific version depends on which CVE is affecting your installation) and consider implementing additional security layers such as web application firewalls that can detect and block malicious HTTP requests.
Similar issue at line number 93.
Severity: Critical
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The fix adds input validation using the @validated and @pattern annotations to ensure that the userInput parameter only contains alphanumeric characters, mitigating the risk of SQL injection attacks.
| public void drive(@RequestParam("input") String userInput, | |
| // Import statements | |
| // import org.springframework.web.bind.annotation.GetMapping; | |
| // import org.springframework.web.bind.annotation.RequestParam; | |
| // import javax.persistence.EntityManager; | |
| // import org.springframework.validation.annotation.Validated; | |
| // import javax.validation.constraints.Pattern; | |
| @GetMapping | |
| public void drive(@RequestParam("input") @Validated @Pattern(regexp = "^[a-zA-Z0-9]+$") String userInput, | |
| @RequestParam("em") EntityManager em){ | |
| // JPA SQL Injection |
| // {fact rule=improper-certificate-validation@v1.0 defects=0} | ||
| // ok:insecure-hostname-verifier | ||
| class LocalHost implements HostnameVerifier { | ||
| public boolean verify(final String hostname, final SSLSession session) { |
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Caution
Description: The LocalHost HostnameVerifier only checks if the hostname is "localhost", which is insecure for most production environments. Implement a more robust hostname verification that checks against a list of valid hostnames or uses proper certificate validation.
Severity: Critical
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The fix addresses the insecure hostname verification in the LocalHost class by implementing a more robust check against a list of valid hostnames. Instead of only checking for "localhost", the updated code now checks against a list of common local hostnames including "localhost", "127.0.0.1", and "::1". This provides better security while still allowing connections to local development environments.
| public boolean verify(final String hostname, final SSLSession session) { | |
| package lang.security.audit.crypto.ssl; | |
| import javax.net.ssl.HostnameVerifier; | |
| import javax.net.ssl.HttpsURLConnection; | |
| import javax.net.ssl.SSLSession; | |
| import java.util.Arrays; | |
| import java.util.List; | |
| // {fact rule=improper-certificate-validation@v1.0 defects=1} | |
| // ruleid:insecure-hostname-verifier | |
| class AllHosts implements HostnameVerifier { | |
| public boolean verify(final String hostname, final SSLSession session) { | |
| return true; | |
| } | |
| } | |
| // {/fact} | |
| // {fact rule=improper-certificate-validation@v1.0 defects=0} | |
| // ok:insecure-hostname-verifier | |
| class LocalHost implements HostnameVerifier { | |
| private static final List<String> VALID_HOSTNAMES = Arrays.asList("localhost", "127.0.0.1", "::1"); | |
| public boolean verify(final String hostname, final SSLSession session) { | |
| return VALID_HOSTNAMES.contains(hostname); | |
| } | |
| } | |
| // {/fact} | |
| // {fact rule=improper-certificate-validation@v1.0 defects=1} | |
| // cf. https://stackoverflow.com/questions/2642777/trusting-all-certificates-using-httpclient-over-https | |
| class InlineVerifier { |
| // ruleid:insecure-hostname-verifier | ||
| HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier(){ | ||
| public boolean verify(String hostname, SSLSession session) { | ||
| return true; |
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Caution
Description: The HostnameVerifier implementation always returns true, accepting any hostname without verification. Implement proper hostname verification logic instead of accepting all hostnames.
Severity: Critical
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The fix addresses the insecure hostname verification by replacing the always-true return statement with a call to the default hostname verifier. This change ensures that proper hostname verification is performed instead of accepting all hostnames indiscriminately. However, it's important to note that this fix assumes the default hostname verifier is secure and appropriate for the specific use case. In a production environment, a more robust and tailored verification logic might be necessary.
| return true; | |
| // ruleid:insecure-hostname-verifier | |
| HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier(){ | |
| public boolean verify(String hostname, SSLSession session) { | |
| // Implement proper hostname verification logic | |
| // For example: | |
| return HttpsURLConnection.getDefaultHostnameVerifier().verify(hostname, session); | |
| } | |
| }); | |
| } |
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| if ((request.getMonth() <= 12 && request.getMonth() >= 1)) { | ||
| Statement statement = connect.createStatement(); | ||
| String query = "SELECT emp_name,emp_mail,manager_id FROM employee WHERE emp_id=" + empid; |
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Caution
Description: SQL query is constructed using string concatenation, which is prone to SQL injection. Use PreparedStatement instead of string concatenation to construct SQL queries.
Severity: Critical
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The fix addresses the SQL injection vulnerability by replacing the string concatenation with a PreparedStatement. The query is now parameterized, with the empid value set using setInt() method, preventing potential SQL injection attacks. This approach ensures that user input is treated as data, not as part of the SQL command.
| String query = "SELECT emp_name,emp_mail,manager_id FROM employee WHERE emp_id=" + empid; | |
| int CurrentYear = Year.get(Year.YEAR); | |
| if ((request.getMonth() <= 12 && request.getMonth() >= 1)) { | |
| // Use PreparedStatement to prevent SQL injection | |
| String query = "SELECT emp_name, emp_mail, manager_id FROM employee WHERE emp_id = ?"; | |
| try (PreparedStatement preparedStatement = connect.prepareStatement(query)) { | |
| preparedStatement.setInt(1, empid); | |
| ResultSet resultSet = preparedStatement.executeQuery(); | |
| } | |
| // {fact rule=sql-injection@v1.0 defects=0} | |
| // ok: tainted-sqli | |
| ResultSet resultSet2 = statement.executeQuery("SELECT * FROM employee"); |
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✅ I finished the code review, and left comments with the issues I found. I will now generate code fix suggestions. |
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