Error-based SQL Injection
Description
An error-based attack is based on errors emitted by the database server, which allows understanding the database structure and exfiltrating database content.
Impact
- Allow an attacker to interfere with the queries that an application makes to its database.
- Retrieve information from the database an even extract data.
- Affect the authentication and authorization aspects of the application.
- Steal sensitive information stored in databases.
Recommendation
- Use of prepared statements (with parameterized queries).
- Use of stored procedures.
- Enforcing the least privilege.
Threat
Anonymous attacker from an intranet.
Expected Remediation Time
⌚ 60 minutes.
Score
Default score using CVSS 3.1. It may change depending on the context of the src.
Base
- Attack vector: N
- Attack complexity: L
- Privileges required: N
- User interaction: N
- Scope: U
- Confidentiality: L
- Integrity: L
- Availability: L
Temporal
- Exploit code maturity: X
- Remediation level: X
- Report confidence: X
Result
- Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X
- Score:
- Base: 7.3
- Temporal: 7.3
- Severity:
- Base: High
- Temporal: High
Score 4.0
Default score using CVSS 4.0. It may change depending on the context of the src.
Base 4.0
- Attack vector: N
- Attack complexity: L
- Attack Requirements: N
- Privileges required: N
- User interaction: N
- Confidentiality (VC): L
- Integrity (VI): L
- Availability (VA): L
- Confidentiality (SC): N
- Integrity (SI): N
- Availability (SA): N
Threat 4.0
- Exploit maturity: X
Result 4.0
- Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- Score:
- CVSS-BT: 6.9
- Severity:
- CVSS-BT: Medium
Compliant code
The application performs queries using standardized and sanitized parameters.
static void getQuery(param){
param = java.net.URLDecoder.decode(param, ""UTF-8"");
//Clean User parameters
cleanParam = getCleanValue(param)
//Do Query with a standard sentence
String sql = ""INSERT INTO users (username, password) VALUES ('foo','""+ cleanParam + ""')"";<br><br> try {
java.sql.Statement statement = org.owasp.benchmark.helpers.DatabaseHelper.getSqlStatement();
org.owasp.benchmark.helpers.DatabaseHelper.outputUpdateComplete(sql, response);
} catch (java.sql.SQLException e) {
...
);
}
Non compliant code
The application contains possible harmful time-delay query
static void getQuery(userSql){
try {
java.sql.Statement statement = org.owasp.benchmark.helpers.DatabaseHelper.getSqlStatement();<br><br> // make query without filtering user input
org.owasp.benchmark.helpers.DatabaseHelper.outputUpdateComplete(sql, response);
} catch (java.sql.SQLException e) {
...
);
}
Requirements
Fixes
