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Fragile Data visibility & Performing actions with respect to the target

Fragile Data visibility & Performing actions with respect to the target

As much as this time, we’re able to launch the OkCupid application that is mobile a deep website website website link, containing a harmful JavaScript rule into the part parameter. The after screenshot shows the last XSS payload which loads jQuery and then lots JavaScript rule through the attacker’s host: (take note top of the part offers the XSS payload while the base section is the identical payload encoded with URL encoding):

The screenshot that is following an HTTP GET demand containing the last XSS payload (part parameter):

The server replicates the payload delivered previous into the area parameter therefore the injected code that is javaScript performed within the context for the WebView.

As previously mentioned before, the last XSS payload lots a script file through the attacker’s host. The loaded JavaScript code will be properly used for exfiltration and account contains 3 functions:

  1. steal_token – Steals users’ verification token, oauthAccessToken, plus the users’ id, userid. Users’ sensitive information (PII), such as for example current email address, is exfiltrated aswell.
  2. steal_data – Steals users’ profile and data that are private preferences, users’ characteristics ( e.g. responses filled during registration), and much more.
  3. Send_data_to_attacker – send the data collected in functions 1 and 2 towards the attacker’s host.

steal_token function:

The big event produces a call that is api the host. Users’ snacks are delivered to the host considering that the XSS payload is performed within the context associated with the application’s WebView.

The host responds by having a vast json containing the users’ id plus the verification token also:

Steal information function:

An HTTP is created by the function request endpoint.

In line with the information exfiltrated within the steal_token function, the demand will be delivered because of the authentication token while the user’s id.

The host reacts while using the information about the victim’s profile, including e-mail, intimate orientation, height, family members status, etc.

Forward information to attacker function:

The event produces a POST request towards the attacker’s host containing all the details retrieved in the function that is previous (steal_token and steal_data functions).

The after screenshot shows an HTTP POST request provided for the attacker’s host. The demand human body contains all the victim’s information that is sensitive

Performing actions with respect to the target can also be possible as a result of exfiltration of this victim’s verification token and also the users’ id. These details is employed into the harmful JavaScript rule (in the same way used in the steal_data function).

An attacker can perform actions such as forward messages and alter profile data as a result of information exfiltrated within the function that is steal_token

  1. Authentication token, oauthAccessToken, is employed within the authorization header (bearer value).
  2. Consumer id, userId, is added as needed.

Note: An attacker cannot perform account that is full because the snacks are protected with HTTPOnly.

the details exfiltrated within the function that is steal_token

  1. Authentication token, oauthAccessToken, is employed within the authorization header (bearer value).
  2. Consumer id, userId, is added as needed.

Note: An attacker cannot perform account that is full considering that the snacks are protected with HTTPOnly.

Online Platform Vulnerabilities Mis-configured Cross-Origin Site Sharing Policy Contributes To Fragile Information Publicity

for the duration of the investigation, we now have unearthed that the CORS https://datingrating.net/seniorpeoplemeet-review policy of this API host api.OkCupid.com just isn’t configured correctly and any beginning can deliver needs towards the host and read its’ reactions. The after demand shows a demand delivered the API host through the beginning

The host will not precisely validate the foundation and reacts utilizing the required information. Furthermore, the host reaction contains Access-Control-Allow-Origin: and Access-Control-Allow-Credentials: real headers:

Only at that point on, we discovered that individuals can deliver needs into the API server from our domain without having to be obstructed because of the CORS policy.

The moment a target is authenticated on OkCupid browsing and application into the attacker’s internet application, an HTTP GET demand is provided for containing the victim’s snacks. The server’s response contains A json that is vast containing the victim’s verification token while the victim’s user_id.

We’re able to find a lot more data that are useful the bootstrap API endpoint – sensitive and painful API endpoints when you look at the API host:

The screenshot that is following painful and sensitive PII data exfiltration from the /profile/ API endpoint, utilizing the victim’s user_id as well as the access_token:

The after screenshot shows exfiltration regarding the victim’s communications through the /1/messages/ API endpoint, utilising the victim’s user_id plus the access_token:

Summary

the entire world of online-dating apps is rolling out quickly across the years, and matured to where it is at today with all the change up to a electronic globe, particularly in the past 6 months – considering that the outbreak of Coronavirus around the world. The “new normal” habits such as as “social distancing” have actually forced the dating globe to enticount depend on electronic tools for support.

The study delivered right right here shows the potential risks related to one of many longest-established and a lot of apps that are popular its sector. The need that is dire privacy and information protection becomes much more important whenever plenty personal and intimate information being stored, handled and analyzed in a application. The platform and app was made to create individuals together, but needless to say where individuals get, crooks will observe, to locate effortless pickings.

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