URL redirection is a technique for making web resources available under more than one URL address, or moved to a different location while maintaining compatibility with previously published URLs.

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48
votes
7answers
33k views

Trying to make a Django-based site use HTTPS-only, not sure if it's secure?

The EFF recommends using HTTPS everywhere on your site, and I'm sure this site would agree. When I asked a question about using Django to implement HTTPS on my login page, that was certainly the ...
46
votes
6answers
7k views

Site is being redirected to Viagra store; all the usual suspects turn up nothing

I have a client's site (http://changewise.biz) being redirected to a Viagra store (mywifeishappy.com). We've gone through all the usual suspects but cannot find the culprit that's causing the ...
24
votes
2answers
568 views

Bypassing HTTP to HTTPS cached 301 redirect to use SSLstrip

I'm doing some pen. tests on a HTTPS (443) server that does not have HSTS implemented (no HSTS headers on response and the address is not on Chrome HSTS preload list). The problem is that in my ...
18
votes
3answers
2k views

URL Shortening - How to verify if it is a non-malicious URL?

Again, I must mention that I have just started to learn about security. So, please bear with my newbie questions. If I receive a shortened URL from somewhere, say in an my-email or in a social media ...
12
votes
2answers
6k views

Sites being redirected to adult site in all devices [closed]

From past couple of days, we are facing this issue where sites are automatically being routed to an adult site, although we get a 404 Not Found HTTP error. First guess is obviously that my system is ...
11
votes
3answers
3k views

Are open redirects a security concern?

Are open redirects a security concern? Google writes that: "An open redirect isn't a bug or a security flaw in and of itself—for some uses they have to be left fairly open." And Google's bounty ...
9
votes
2answers
1k views

Redirecting/rickrolling intruders

While browsing for Node.js packages, I came across this one. It's purpose is to redirects crawlers away from a site, and by default it Rickrolls them. I find the idea amusing, but is it a good idea to ...
9
votes
4answers
9k views

Testing clean urls with sqlmap

Is it possible to test for SQL injection vulnerabilities with using sqlmap with a url that is using mod rewrite (or something like it) to make the urls clean? I know how to test my sites that have ...
9
votes
4answers
363 views

Defending site against being abused by phishing

Say you have a web site and you are using some returnUrl URL parameter to redirect user back to page where he was after login or editing some records in user area. Is there some standard way how to ...
9
votes
1answer
1k views

Is HSTS (Strict-Transport-Security header) for HTTP or HTTPS?

Is the Strict-Transport-Security header intended for HTTP or HTTPS? What I mean is, do I respond with this header on a HTTP connection which in turn tells the browser to use HTTPS only from that point ...
8
votes
2answers
1k views

How dangerous is it to allow arbitrary webhook urls to post to?

I am building a Ruby on Rails API that posts to webhooks that the API user can create, whenever a resource that he manages is created, updated or destroyed, using the HTTParty gem. This got me ...
7
votes
8answers
824 views

What is the vulnerability in my PHP code?

A website of mine was recently hacked. Although the actual website remain unchanged, they were somehow able to use the domain to create a link that re-directed to an ebay phishing scam. I've taken ...
7
votes
4answers
243 views

Bank website forwards to false site - formatted hard drive - still forwards

Summary: When I visit my bank's website, I get forwarded to a phishing mirror site. This has persisted through a re-format of my MacBook. Even on different browsers! Other computers on the same ...
6
votes
1answer
421 views

Is an HTTP 301 redirect to HTTPS, insecure?

For a website, I force a 301 redirect from http://login.example.com to https://login.example.com using a .htaccess file. As I read in this question this still imposes a security threat. I'm wondering ...
6
votes
3answers
670 views

Url Shortener vulnerability

I have service like tiny URL to shorten www.example.com/[6chars] URLs. However it includes person specified sensitive information. How can I protect the URL bruteforce scanners to the detect if URL ...
6
votes
2answers
1k views

Web redirecting to porn site

My company missed to extend a domain name by few days, so it went to grace period. From what I know, if it went to grace period, people would still be able to access my website. However, the site was ...
6
votes
3answers
650 views

Favicon Redirection Possible Security Flaw

I have the domain example.com When I enter the URL https://api.example.com, Chrome loads the page and also tries to load https://myapp.example.com/favicon.ico, and that request receives a 301 ...
6
votes
2answers
389 views

Prevent phishing attacks through abuse of IOS URL scheme

I am building an IOS application that will have the following flow: A user completes registration from the web. Upon completion of registration, a link is sent to his email. Once the link is clicked ...
5
votes
8answers
556 views

Checking “return” parameter in login page

My login page accepts the "return" parameter, which should contain URI to redirect user if he wasn't logged in and tried to access page which isn't accessible by unauthenticated users. It could be ...
5
votes
2answers
3k views

How to properly validate HTTP redirects?

I'm reading OWASP's Secure Coding Practices Checklist and under their "Input Validation" section they have an item that reads: Validate data from redirects (An attacker may submit malicious ...
5
votes
1answer
624 views

Wordpress site redirects to different site when using https. Have I been hacked?

I own my domain and blog infrequently, when I try to access it over https I'm first shown a warning which says that the certificate isn't trusted. This is expected as I never configured SSL for my ...
5
votes
1answer
670 views

A couple of redirects after clicking in a link, what are they after?

I got an mass email from an friend containing only this link (made not clicable on purpose): http://www.casadelapiedra.com/components/com_content/id876757355.php I imagine she is got some kind of ...
5
votes
1answer
471 views

What are the risks of accepting URL param for automatic redirection?

Can anybody name all the risks of the following scenario: User visits a page, but his session is expired, so he is auto-redirected to login page with his previous page and params added as a single ...
4
votes
3answers
1k views

Unknown URL shows my website

I run a website at https://fastslots.co. I just discovered that I am getting requests from the URL https://canadaehtees.com/ that I have no affiliation with. When I load canadaehtees.com in my browser ...
4
votes
4answers
285 views

Is it safe to redirect to URL parameter without filtering?

A webpage redirects to an URL given in parameter redirect without filtering it, like this: $newURL=$_GET["redirect"]; header('Location: '.$newURL); login.php?redirect=home.php If it echoes the ...
4
votes
3answers
874 views

URL redirection vulnerability

I've just read the following advisory at http://www.securitypentest.com/2011/02/facebook-url-redirect-vulnerability.html. In its solution section, I found a strike-through text: "Only works when your ...
4
votes
2answers
1k views

What is the purpose of using Youtube-style alphanumeric ids as URL slugs?

I asked a question on StackOverflow on how to generate the alphanumeric/base64 resource IDs that Youtube, Instragram, and others use to identify videos/pictures/etc. Discussion led to the question of ...
4
votes
3answers
2k views

sslstrip vs. privoxy redirect rule on clients

I watched this video: http://www.securitytube.net/video/193 Now I'm thinking about an example. Suppose I have a privoxy proxy on my PC: user.action file (just part of it): { ...
4
votes
2answers
376 views

Preventing unvalidated redirects and forwards

Suppose you have a redirect page where the client is redirected to a URL from the query string: http://victim/redirect.aspx?url=http://evil/ You really need to be able to redirect to a another page ...
4
votes
2answers
917 views

When is an intermediate page needed before directing a user off my primary website? What is the best implementation?

The NSA has a page that intercepts redirections off the primary site. (click "TLS: "Suite B Cipher Suites for TLS," RFC 5430" for an example). I've seen this used in Exchange Outlook Web Access ...
4
votes
1answer
1k views

Are there any know browsers that support file URL redirection?

I've been addressing an open-redirect issue and in experimenting with the latest fix, I noticed that updating the redirect's protocol to file resulted in a blank page on the browser. That is, ...
3
votes
3answers
496 views

iptables rule to ban and redirect malicious traffic

I'm running Apache 2 and after analysing the access_log I discovered that my website is visited more than 800 times a day (today 924) from majestic.co.uk bot. The bot use this range of IP addresses: ...
3
votes
1answer
224 views

Ways to Redirect URLs

I'm looking for some interesting ways to redirect URLs. For example, http://example.com:@example.org will redirect to example.org. Are there any other ways to redirect/spoof URLs in a browser like ...
3
votes
2answers
92 views

Is URL redirection in PHP safe if I use ../../ as a prefix?

I am developing a PHP web app and I'm in the process of implementing a redirection functionality. I know that redirection can be dangerous when it can be set on the client side and I use ../../ as a ...
3
votes
1answer
97 views

Can we detect malicious redirections by retrieving the webpage's headers? [closed]

Is it possible to know if there are URL redirections (to malicious websites) by retrieving the HTTP request and response headers of the legitimate website ?
3
votes
1answer
1k views

How to fix open redirect vulnerability?

In redir.php: header("Location: {$_GET['addr']}"); For fixing open redirect vulnerability i can think of several ways: 1- (Side effect of) Using a security token (anti-csrf token): ...
3
votes
3answers
202 views

A way to secure hyperlinks on websites

How do you think could we secure hyperlinks pasted by users on website's forums, comments, blogs against bad links/leading to malware etc.? I thought about google safe browsing, projecthoneypot. Did ...
3
votes
0answers
92 views

One-time mystery redirect from one of our pages

I'll make the explanation of the situation as thorough as I can, and the question is at the bottom. Recently, we received a report from one of our users that, immediately after logging out of our ...
3
votes
0answers
59 views

All Devices on Network Being Redirected to Malware Download [closed]

I have a curious problem. I received a compromised email from an address on my university's domain. Not realizing it was faked, I clicked a link in the email to a url on my university's domain, and ...
2
votes
3answers
386 views

Should I trust URL based on file extension like this: http://example.com/image.jpg

I created a slideshow and mentioned that user must not trust URL based on file extension, however, I got some claims against that, because URL's like this should be safe: ...
2
votes
1answer
143 views

US Department of Labor Watering Hole Attack

So I read this article about how the US Department of Labor's website was compromised and users were redirect to a site that installed malware: ...
2
votes
1answer
778 views

Why is a link posted to Facebook going through all redirects and showing info for final page only?

Today I read a post on a Facebook-group about a "problem" with links posted to Facebook. Appearently when you post a link at Facebook, the sites goes through the redirect(s) that may be on the site ...
2
votes
2answers
128 views

Is this vulnerable to an insecure URL redirection attack

I have an ASP.NET MVC website that is using Identity for authentication. It runs in IIS 8.5 as HTTP but has SSL terminated at the Load Balancer and is HTTPS for everything between the browser and the ...
2
votes
1answer
297 views

302 redirect and the body on the page (you are redirected to …)

I have page which take URL on query and string and it. Then, you get redirected using 302 to another page, and the response of the page contains HTML code and the redirect header. Like this: ...
2
votes
1answer
7k views

Is google.com/webhp malicious?

Lately, I've noticed the addition of "/webhp" in the url of Google searches along with some additional variables, "sourceid", "rlz", and a few others. Together, they make a URL in the form of ...
2
votes
1answer
436 views

How effective is a URL scanner?

How do I test if a Link is REALLY malicious or not ? I use VirusTotal, but I suspect that it is not useful at all. To see why, please read further. I wanted to find out which side the stomach is on. ...
2
votes
1answer
386 views

HTTP Host Header redirect traffic

Recently, I've seen periodic floods of traffic to my web servers with various Host headers that do not belong to us. The traffic appears to come primarily from China and a decent number seem to think ...
2
votes
1answer
310 views

What is this attacker trying to accomplish?

My client is who is running a recent version of vBulletin is getting lots strange activity and I'm at a loss to explain what the attacker is trying to accomplish. The attacker registers a fake user ...
1
vote
1answer
441 views

Why add “***” in user-agent in this malicious code?

I found the following in every index file of my sites on a server I have. It looks like its redirecting all android users to some spooky Russian site. $ua = $_SERVER['HTTP_USER_AGENT']; ...
1
vote
1answer
161 views

Android's Encryption mechanism

Well, according to my Android smartphone, it says the phone has been encrypted. Should I be worried if it has a malware or if I get hacked because I once clicked a link on a certain website then I ...