A cookie, also known as an HTTP cookie, web cookie, or browser cookie, is used for an origin website to send state information to a user's browser and for the browser to return the state information to the origin site. The state information can be used for authentication, identification of a user ...

learn more… | top users | synonyms

4
votes
1answer
883 views

How to detect cookie stuffing attacks?

So the question is how to detect cookie stuffing attacks and how to protect against them? In case of image-based cookie stuffing I can detect that related resources are not loaded and therefore ...
4
votes
1answer
484 views

Does returning `Access-Control-Allow-Origin: *` weaken the security of JSON GET responses?

The W3C CORS recommendation states: Certain types of resources should not attempt to specify particular authorized origins, but instead either deny or allow all origins. ... 3. A GET ...
4
votes
1answer
157 views

'Remember Me' combined with Auth Token

I've developed a client application which talks over a REST API to a server. The way the application works is to send the username/pwd pair in the initial login to the server and then respond with an ...
4
votes
1answer
220 views

What countries have laws in place that respect Do Not Track HTTP headers or cookies?

Google offers a Chrome plugin that uses cookies to control privacy, while Firefox offers a HTTP Header to tell websites to not track the users and log the data anonymously. This obviously extends a ...
3
votes
2answers
225 views

Is it possible to steal a non secure Cookie when the Web Server (IIS) only allows Https?

Is it possible to steal a non secure Cookie (Secure Flag is false) when the Web Server (IIS) only allows Https?
3
votes
5answers
387 views

Does setting the cookie-path protect me from XSS from another context?

Lets say I am using a reverse proxy with URL rewriting that provides access to 2 different applications http://www.example.com/app1/ and http://www.example.com/app2/. I don't want those ...
3
votes
2answers
323 views

Reusing the same session-ID necessarily bad?

The question is related to session-ID management in a particular php-based web-app. The web-app uses the same session-ID for each session for a fixed user. So, after logging-out of the application, ...
3
votes
3answers
2k views

cookies “secure” flag

How does cookies "secure" attr work to determines whether cookie itself should be included? e.g. [HTTP(unencrypted) connection] 1. user has no cookie yet and tries to log in; 2. user logs in ...
3
votes
2answers
331 views

Security concerns about my webapp

I read though OWASP very carefully, but I am not sure about some parts of my website. I am using jbcrypt on my website. It stores the salt in the hash itself something like this hash+salt. I read ...
3
votes
4answers
2k views

Can a session be hijacked if the user is redirected from HTTPS to HTTP after login?

I am developing a web app, which makes HTTP calls as long as the user is not logged in. Once the user clicks the login button, he is sent to a "login page" that is HTTPS. The login makes an Ajax call ...
3
votes
4answers
204 views

Improving the privacy of a casual Web user

I am interested in improving the privacy available to me as a casual internet user with a default browser. I think that Tor is too slow and that the "Privacy Mode" in browsers isn't really practical. ...
3
votes
5answers
356 views

Is it possible to see if a script on a website steals session cookies?

I'm looking as some web analytics solutions, I know it sounds paranoid. but cookie-based web analytics need for you to paste their JavaScript code on your web-site. I don't like the idea too much of ...
3
votes
6answers
943 views

Is cookie-based XSS exploitable?

Today I've found interesting site that output your cookie value directly to the page, so if I modify the cookie value I can XSS myself. e.g <span id=statistics>Last visit: ...
3
votes
2answers
2k views

Why are CSRF tokens necessary?

It seems that the entire problem could be solved very elegantly by simply adding a new flag to the HTTP cookie specification. Similarly to how cookies flagged Secure will only be submitted by the ...
3
votes
2answers
223 views

Computer-level logging by financial institutions

I am looking for the best approach to recognizing a specific computer and saving that computer as a "safe" login machine. My intuition points me to using cookies, but what value do I store in there to ...
3
votes
3answers
238 views

Why Parallels 8 installer looking into my Chrome's Cookies?

While trying to install Parallels on OS X I looked into Activity Monitor to find where is the installed Parallels located (it was weird that it stays invisible in Application folder). And than I found ...
3
votes
2answers
646 views

If a login/session cookie is stolen,does changing the password void it?

Considering the scenario where a Gmail session/login cookie is hijacked or stolen and it is discovered my means of Gmail last account activity,will changing my password immediately void the cookie or ...
3
votes
1answer
204 views

What servers or clients are immune to related-domain cookie attacks? (*.example.com)

In this question, I want to identify browsers, servers, or implementations that are immune from related domain cookie attacks (e.g. a.example.com vs b.example.com). Lacking any tangible solution, ...
3
votes
2answers
3k views

Can Cookies Without the Secure Flag be Stolen, even when only accessed via HTTPS?

Is it possible to capture the cookies used by HTTPS site when cookies don't have secure flag set. Suppose the site is https://www.example.com. http://www.example.com does not show up, also ...
3
votes
1answer
466 views

How to MiTM insert an iframe using burp or another tool?

So, I am trying to obtain a cookie without the secure flag enabled over HTTPS. After reading about it, I came across an answer: You visit https://secure.example.com/ which drops a cookie on your ...
3
votes
1answer
160 views

Session Token Embedded in Form

I have a session token that's stored in a browser cookie client side. The cookie is already available for scripting and it's used to validate XHR through Javascript. For a particular page I'm using ...
3
votes
3answers
342 views

Are there any same origin issues (SOP) with TOR?

Are there any issues with Same Origin Policy (SOP) with TOR or *.onion addresses? I'm thinking of cookies Plugins (Silverlight, Flash, Java, etc) Javascript
3
votes
2answers
189 views

How can I tell who's using my cookie information on an open LAN?

I think someone is using my cookie info to log into my Facebook account on a public Wi-Fi network. How can I determine if this is happening and from what IP address?
3
votes
2answers
67 views

Is it normal for a payment procedure to ask for third party cookies to be turned on?

I was trying to pay for mobile phone credit online from a service provider. I selected the amount to pay and clicked next to continues. The following page asked me to turn on third party cookies if I ...
3
votes
1answer
133 views

Vulnerabilities of having one path of app accessible only via HTTPS but others via HTTP?

Imagine example.com that is accessible via HTTP and HTTPS. Most of content at site isn't secure and it won't be bad if it will be read by attacker. One of paths - example.com/secure_zone is accessible ...
3
votes
1answer
695 views

Storing users cookies in a database on a server

I want to use Apple Push Notification Service, so I need a server. This server will have to check a site every x minutes. How the site that has to be checked requires the user to login. So is it ok ...
2
votes
2answers
153 views

Can cookies reveal my email address?

When I visit livescore.com, ten seconds later I receive marketing emails from gambling companies. If I don't visit this site, I don't receive these emails. Similar things happen when I visit Twitter ...
2
votes
3answers
225 views

What do web trackers know about/think of me?

Many companies use HTTP cookies, flash cookies, and other analytics to track visitors on the web and classify them. How can I find out what my web profile is currently, and what these trackers are ...
2
votes
1answer
123 views

What's the point of rejecting a cookie?

When you access a website, lynx provide the option to reject a cookie, what's the point of doing so? All I thought about is that if you don't accept a cookie, you cookie won't be stolen during a XSS ...
2
votes
2answers
875 views

Is my current method of handling session cookies insecure?

I'm writing a multi-tenant application where accounts are scoped by subdomains. This adds considerable complexity and I'm starting to worry about security. Each user can have several accounts. For ...
2
votes
3answers
538 views

Session fixation attack

Given the following conditions, Session ID does not change upon login Session ID travels in form of HTTP cookie There is no cross site scripting/redirection vulnerability on the login page is it ...
2
votes
2answers
607 views

What if a browser does not understand the secure flag of cookie

I have two questions related to the same: 1 - As 'Httponly' attribute is understood by a set of modern browsers (https://www.owasp.org/index.php/HttpOnly#Browsers_Supporting_HttpOnly), I was ...
2
votes
4answers
168 views

New gTLDs are coming. How will browsers handle cookies, SOP and certificates?

Given that the security "zone" varies based on the TLD, how will the new TLS be handled? For example: A browser may permit cookies to be shared and SSL certificates, and wildcard certificates ...
2
votes
1answer
509 views

How can Bank of America tell that I'm logging in on a computer I haven't used with them before?

When you sign into Bank of America for the first time on a computer that you haven't used with them before, they detect this and force you to answer one of your security questions. I think I've seen ...
2
votes
2answers
237 views

How attacker can access victim's account without knowing its credentials?

I want to login facebook from a wifi connection and check sign-in page is over https but later when i don't pay attention to address bar (for example when playing games and click on links like a crazy ...
2
votes
1answer
372 views

What is this spam used for?

Recently my secondary e-mail address was exposed by an incident, and soon I received this spam. What is this spam used for?
2
votes
1answer
178 views

HeartBleed - how do I invalidate all session cookies?

As part of the Heartbleed event, I have upgraded OpenSSL, reissued and replaced certificates and revoked the old ones and changed passwords however, I am also seeing advice to invalidate all session ...
2
votes
1answer
127 views

Can a webpage read another page's cookies?

I was listening to Pandora as I logged in here, and the next commercial was about InfoSec. That set me wondering as to whether that was a coincidence (probably) or if they knew somehow. To make a long ...
2
votes
1answer
2k views

Stopping Session Hijacking

If you noticed, I put "stopping" instead "preventing" in the title because I want my PHP application to be as secure as possible. I am wondering if anyone has any better ways to prevent session ...
2
votes
1answer
240 views

XSS cookie stealing without redirecting to another page

I'm practicing in VM following the OWASP guide. I know that is possible to steal the cookie by redirecting to "False" page etc. but I would like to steal the cookie without redirecting on another ...
2
votes
2answers
188 views

Are these two ways safe?

I have two scenarios and want to know if each is secure or which risk there are. Number One: If the User has the edit Link (edit/[md5hash]) he can edit a post. The editkey (the hash) is in an form ...
2
votes
1answer
985 views

cookie issue with same domain same path but different port

I have two web app running on same host on same path but on different port http://somedomain.com/ and https://somedomain.com/ now when I visit first app it serves the cookie say with name abc, and ...
2
votes
2answers
84 views

Can sessions be handled securely with cookies disabled?

I've been doing some reading here about session ID handling, and have learned that it's generally a bad idea to include a session ID in the HTML source code, and/or on the query string. For example Is ...
2
votes
2answers
204 views

how is Google Ads managing to track me? (even if I don't keep cookies!??) [duplicate]

NOTE: in this question I am interested in discovering the actual method used by Google to track me -in my particular case- and in exploring eventual ways to circumvent it. This is completely different ...
2
votes
1answer
895 views

Should cookies that contain non sensitive information be encrypted?

I'm in the process of creating a website and uses cookies to track user login. The only bit of information I store in this cookie is the users username. Should I be encrypting the username even ...
2
votes
1answer
242 views

UUID and Open_id in cookie 'good' enough?

I am using Tomcat 7, jsp to build a small website. I am new to security and it is a school project so using Spring Security is not an option. I am attempting to store UUID and Open_id in the clients ...
2
votes
2answers
321 views

HTTPOnly Cookies: Security Depends on Client Cooperation?

I've been implementing HTTPOnly cookie-based session handling and have some questions about what HTTPOnly means. I realise it's a flag that gets passed around in the HTTP header when setting cookies. ...
2
votes
2answers
349 views

anti-replay attack for secure cookies?

In the system that i'm working on, we are having some session cookies on the client side that we need to protect against the replay attack ! So I find the following paper ...
2
votes
1answer
127 views

Session Cookie HttpOnly Set After Initial Server Response Showing as Vulnerable

Is a session cookie set without HttpOnly at first, but added before the client browser finishes rendering, still considered vulnerable? The scanner test I need to satisfy believes so, but is this a ...
2
votes
1answer
362 views

Active Directory: Should Workstations be separated from servers to protect from related domain hacks?

How should I protect domain joined hosts in the same AD domain from the Related Domain Cookie Attack? Suppose there is an AD forest called example.com. This company has a variety of internal and ...