SQL injection can occur when all of the following conditions are met:
e.g.
Simple mode must be enabled:
// connection string includes "prefer_simple_protocol=true"
// or
// directly enabled in code
config.ConnConfig.PreferSimpleProtocol = true
Parameterized query:
SELECT * FROM example WHERE result=-$1 OR name=$2;
Parameter values:
$1
=> -42
$2
=> "foo\n 1 AND 1=0 UNION SELECT * FROM secrets; --"
Resulting query after preparation:
SELECT * FROM example WHERE result=--42 OR name= 'foo
1 AND 1=0 UNION SELECT * FROM secrets; --';
The problem is resolved in v4.18.2.
Do not use the simple protocol or do not place a minus directly before a placeholder.
CPE | Name | Operator | Version |
---|---|---|---|
github.com/jackc/pgx/v4 | lt | 4.18.2 | |
github.com/jackc/pgx | lt | 4.18.2 |