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

1
vote
4answers
82 views

How to exploit this include_once vulnerability in PHP?

I'm performing static analisys on a PHP code and came across with this situation: include_once SYSTEM_PATH . 'languages/content-' . $_COOKIE ['lang'] . '.php'; If I try to hack with this HTTP ...
6
votes
4answers
1k views

Use cookies once stolen

I have seen many posts about stealing cookies, as a matter of fact I have taken advantage of the XSS vulnerability to send the cookie to my php through a variable in the url to a php, and that php ...
0
votes
1answer
26 views

extracting JSESSIONID from document.cookie

I was trying cookie stealing on a java and spring based web application. Normally, a cookie can be obtained through <script>alert(document.cookie)</script>, but in the above code, cookie ...
0
votes
1answer
46 views

Sharing RSA Public Key for decrypting JWT amongst Load Balanced servers

I'm trying to implement a cookie-less authentication mechanism for a web API that is stateless on the server (does not store session tokens) and can be load balanced across several servers. I have ...
7
votes
1answer
770 views

Why does every site makes me acknowledge cookie usage? [closed]

In the last year or so every other site on the net started showing different kinds of notification that they're using cookies and I should be aware of it. The sheer number of different sites doing ...
1
vote
1answer
35 views

Securing an OAuth / OpenID Connect identity in a cookie for easy login

I have a website that uses Azure Active Directory or Google+ for logging in. I go through an OAuth2 login flow, and the users email along with their tokens are returned to me by their identity ...
0
votes
0answers
20 views

cookie issue with same domain same port but different path [migrated]

I have a situation where my web application will respond with cookie Rules=abcdefg for each request. Request 1: http : //hostname:8080/teja/axftyo (for this request I am setting cookie path as ...
5
votes
1answer
841 views

What kind of vulnerability would this exploit?

We're currently having our website pentested, and looking through our logs, a cookie we set (our allowCookies cookie) has had the value set to ...
3
votes
3answers
115 views

Where are the user credentials stored when remember password is selected?

Provided a user has chosen the remember me option while logged in last time into a web application,how does the web application server identifies the user next time when he logs in? The credentials ...
1
vote
1answer
33 views

How can non-secure or non-https-only cookie affect security of an HSTS website?

If a website is running on HSTS and it is setting about 20 cookies. Out of those 20 cookies 15 are both secure and https-only and remaining 5 are neither. In this scenario, in what all ways can we ...
2
votes
1answer
38 views

What will disabling third party cookies block?

What is the difference between 1st party cookies and 3rd party cookies and what are the pros and cons of disabling it? Will facebook and google (and other ad companies) be completely unable to track ...
1
vote
1answer
83 views

Is my authentication persistence system design secure?

This system is for a personal file upload and sharing web application made with PHP. When a user logs into the application, it has the option to "stay logged in" after closing and reopening their ...
1
vote
2answers
67 views

Will the cookies crumble when it comes to proxy servers?

One important use of proxy servers as I understand reading Wikipedia is to keep you anonymous from other servers by acting as a middle-man. If that is indeed the case, consider the following ...
1
vote
1answer
52 views

Cookie Tossing explained

Can someone explain to me what cookie tossing is? and how it can be used to hijack someone's session? and also how can we prevent it? I am a bit confused about this subject.
-4
votes
5answers
160 views

What is the difference between session fixation and session recreation?

I have read that both of them are conventionally the same. But there must be a few differences which differentiates the two terms. Anyone please explain.
0
votes
2answers
57 views

How session cookies work? [closed]

I want to know the basic working of session cookies. When i tried googling, most of the results came were based on any programming language. I am not good at coding. So it will be helpful if someone ...
0
votes
2answers
137 views

What is actually the purpose of encrypting the values in a cookie?

I was researching on internet security. When I reached at section Cookies, I happened to read that the values inside a cookie are generally stored only after encrypting them. But an encryption can be ...
-1
votes
1answer
45 views

What is cookie reverse engineering? [closed]

I want to know what is this cookie reverse engineering and how to do this is simple words. Thanks in advance.
2
votes
1answer
52 views

Conversant, CNAME, Cookies, and PCI complaince

We have been asked to evaluate Conversant Tracking. http://www.conversantmedia.com/solutions/enterprise-solutions From what I can tell its pretty straight forward tracking, like google re-marketing, ...
2
votes
2answers
160 views

How to avoid session fixation (Login CSRF) by MitM attack without HSTS?

I'm writing a web app that already uses TLS encrypted connections (HTTPS), Secure; HttpOnly session cookie, HMAC-SHA1 CSRF token, requires correct Referer header to avoid Login CSRF and changes ...
2
votes
2answers
67 views

How can one secure Exchange 2010 cookies?

We have received the below finding from an IT audit. Missing Secure Attribute in Encrypted Session(SSL) Cookie: It is best business practice that any cookies that sent over (Set-cookie) an ...
1
vote
1answer
56 views

Logging in users automatically on a website

I'm making a website that has an extended forum feature, where users can login, post comments, etc. I'm making the feature where the website stores cookies in your computer so the next time you visit ...
2
votes
1answer
78 views

Is this a safe way to identify users connecting to a chat server?

Before I start, all information will go over HTTPS. So, my website is basically like a forum with the authentication part finished and working. This forum has a real time chat application that sends ...
0
votes
0answers
56 views

How to disable x-oracle-dms-ecid cookie

During a security audit, our cliente found that we are sending to the cliente a cookie called 'x-oracle-dms-ecid'. They asked to disable it or change its name. We have been reading all the Oracle ...
0
votes
1answer
123 views

How to delete YouTube zombie cookies

Some days ago I noticed that YouTube knows the videos I watched even though I deleted my cookies. I also was not using a YouTube-account. When I noticed I used IE 11. After some research I found out ...
1
vote
2answers
78 views

Can you use https only for cookies and not the html?

I have a few questions, all relating to the title. 1) Is it possible to configure a server to receive the cookies using https but then serve all the content with http? 2) Does SE do this / do many ...
2
votes
3answers
75 views

Flash cookie and man-in-the-middle

I am using the Scala Play web framework. In it, there is a PLAY_FLASH cookie used to flash messages to the user (it's a cookie so it will still work after several redirects). I put HTML in the cookie ...
1
vote
1answer
65 views

Would it be possible to use cookie to store SSL Client Certificate?

Lately, I was reading that article about SSL client certificate. Why is nobody using SSL Client Certificate? The answer was to that question was : In the current state, this excellent idea is ...
0
votes
1answer
90 views

Could HTTPS-Attacks like CRIME be mitigated by changing the session cookie regularly?

I was just reading about CRIME which is an attack to steal sensitive information by creating requests. Could this attack be mitigated, if the Server wouldn't send the client the actual session key to ...
0
votes
2answers
78 views

How to prevent Cookie-Bombs?

Egor Homakov made a nice writeup (Cookie Bomb or let's break the Internet) on how to crash CDNs and other websites with cookies. Although this is a user/browser-side DOS, I'm wondering how one would ...
2
votes
1answer
679 views

Why use an authentication token instead of the username/password per request?

The author of http://stackoverflow.com/a/477578/14731 recommends: DO NOT STORE THE PERSISTENT LOGIN COOKIE (TOKEN) IN YOUR DATABASE, ONLY A HASH OF IT! [...] use strong salted hashing (bcrypt / ...
0
votes
1answer
78 views

How do websites tracker cookies and beacon work?

Could someone please enlighten me, either on a technical level or high level if that detail is not feasible, on how tracker cookies and beacons work. Particularly, how information on my browsing ...
3
votes
1answer
182 views

How is YouTube able to identify anonymous users?

A few days ago I was searching YouTube and I noticed an "outlier" video poped up in the suggestions list. This video had nothing to do with the topic being searched, but instead it was based on a ...
0
votes
2answers
49 views

What conditions allow an attacker to write a cookie?

Some CSRF protection mechanisms are vulnerable to attackers who can write cookies. Others are not but incur extra complexity or computational cost. Help me understand the cost/benefit. What ...
1
vote
0answers
89 views

Accessing Chrome and Gmail on a stolen drive

I was trying to search for this, but could not find the answer anywhere - apology in advance if already answered. I have a Linux desktop installed on a thumb drive, which I keep in my pocket. This ...
1
vote
2answers
134 views

Is it safe to skip CSRF checks for non-browsers?

I was in the middle of implementing a CSRF protection mechanism for my server when I realized that this attack only really affects web browsers. It got me wondering: why should I bother ...
0
votes
1answer
248 views

My cookies have been stolen. What to do?

About a month and a half ago I got infected by a virus called MSIL.Bladabindi. I noticed the virus quite soon because google notified me that someone from Turkey tried to access my account (I'm in ...
0
votes
2answers
97 views

Javascript injection via document.cookie possible?

Let's say someone rooted a site, is it possible for the attacker to do XSS via document.cookie? Instead of giving the user a name=value, the attacker does something like this ...
1
vote
0answers
95 views

CAS protection against CSRF attacks

A website based on Apache Struts uses central authentication service (cas) for login. I'd like to know if additional csrf protection needs to be provided with Struts in case cas doesn't provide that. ...
0
votes
0answers
48 views

Is it possible to prevent attackers from destroying sessions using cookie tossing and cookie overflow attacks?

I won't really go into details of how cookie tossing and cookie overflow attacks work, because this answer explains it perfectly. This post on github explains some mitigation strategies, but does not ...
2
votes
2answers
453 views

Double Submit Cookies vulnerabilities

Is the Double Submit Cookies mechanism vulnerable anything other than XSS and sub-domain attacks? All CSRF protection mechanisms are vulnerable to XSS, so that's nothing new. I'm just wondering if I ...
1
vote
0answers
50 views

Can one scan multiple websites for tracking cookies and beacons?

Do you know of any tools or techniques that allow one to scan multiple sites for the use of tracking cookies, beacons, web bugs, or offsite javascript includes? As far as I can tell, major web ...
3
votes
2answers
215 views

Web security - use of cookie in https

I am taking a web security class and was told by the instructor that most of the websites today use https for authentication and then use a cookie (authentication token) in plain text to keep track of ...
2
votes
1answer
115 views

Does using token-based auth make CSRF checks on login unnecessary?

Based on my understanding, avoiding the use of cookies as an authentication mechanism prevents CSRF vulnerabilities entirely (namely token based authentication in an SPA), when authenticated. Does ...
6
votes
3answers
1k views

Why can't we do MiTM attacks when using secure connection

I have this silly question that is bothering me. When not using secure connection (HTTP for example) cookies can be intercepted and used to connect to the site as if we have the id and password. We ...
5
votes
4answers
745 views

Suggestions to avoid cookie-hijacking in a web application

I've been developing web-apps for quite some time now. While making websites, the "remember me" feature is one of the most trivial(read as must-have-for-clients) feature to be implemented. Until ...
0
votes
1answer
64 views

Setting a temporary cookie to an invalid value when logout improves security?

When a session is closed, for example, when a timeout triggers or when the user clicks the logout button, the session should be terminated at server side so the session cookie is invalid. I think ...
0
votes
3answers
114 views

Does it have sense a One-Time Session Cookie?

Recently I have faced a site that seems to implement something that we can call "one-time cookie". This cookie is used for single-sign on among different sites. In each request the server sends a ...
3
votes
1answer
141 views

XSS via PDF when Content-Disposition: Inline?

There are kind of two questions here: Is it possible to have XSS in a PDF file when the Content-Disposition: is "inline"? If it is possible, does the pdf get access to the cookies for that domain ...
3
votes
2answers
137 views

Letting users pick up where they left off…without logging in (is this bad form?)

I have a Grails app I'm working on that allows users to fill out a fairly lengthy application form. One of the requirements I've been given is to NOT require users to log in or create any sort of ...