Are Firebase Functions safe to use





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my Project is currently so build that all writing operations are handled by a Firebase function like createUser, followUserDirectly, acceptRequest or sendFollowRequest.



My first question is if the functions can be executed by an attacker outside my app and its logic.



The second is: Can the attributes that are passed to the function be modified outside of the intended logic? For example if the wrong user id is passed so that a completely different follow request will be accepted.










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  • 4





    We can't say anything about whether your functions are secure without seeing them. But if they're HTTP-callable functions they won't be secured unless you've secured access to them yourself, as shown for example here: github.com/firebase/functions-samples/tree/master/….

    – Frank van Puffelen
    Jan 3 at 23:00


















0















my Project is currently so build that all writing operations are handled by a Firebase function like createUser, followUserDirectly, acceptRequest or sendFollowRequest.



My first question is if the functions can be executed by an attacker outside my app and its logic.



The second is: Can the attributes that are passed to the function be modified outside of the intended logic? For example if the wrong user id is passed so that a completely different follow request will be accepted.










share|improve this question




















  • 4





    We can't say anything about whether your functions are secure without seeing them. But if they're HTTP-callable functions they won't be secured unless you've secured access to them yourself, as shown for example here: github.com/firebase/functions-samples/tree/master/….

    – Frank van Puffelen
    Jan 3 at 23:00














0












0








0








my Project is currently so build that all writing operations are handled by a Firebase function like createUser, followUserDirectly, acceptRequest or sendFollowRequest.



My first question is if the functions can be executed by an attacker outside my app and its logic.



The second is: Can the attributes that are passed to the function be modified outside of the intended logic? For example if the wrong user id is passed so that a completely different follow request will be accepted.










share|improve this question
















my Project is currently so build that all writing operations are handled by a Firebase function like createUser, followUserDirectly, acceptRequest or sendFollowRequest.



My first question is if the functions can be executed by an attacker outside my app and its logic.



The second is: Can the attributes that are passed to the function be modified outside of the intended logic? For example if the wrong user id is passed so that a completely different follow request will be accepted.







android firebase google-cloud-firestore google-cloud-functions






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edited Jan 3 at 23:08









Doug Stevenson

83.8k10100118




83.8k10100118










asked Jan 3 at 22:48









Florian G.Florian G.

83




83








  • 4





    We can't say anything about whether your functions are secure without seeing them. But if they're HTTP-callable functions they won't be secured unless you've secured access to them yourself, as shown for example here: github.com/firebase/functions-samples/tree/master/….

    – Frank van Puffelen
    Jan 3 at 23:00














  • 4





    We can't say anything about whether your functions are secure without seeing them. But if they're HTTP-callable functions they won't be secured unless you've secured access to them yourself, as shown for example here: github.com/firebase/functions-samples/tree/master/….

    – Frank van Puffelen
    Jan 3 at 23:00








4




4





We can't say anything about whether your functions are secure without seeing them. But if they're HTTP-callable functions they won't be secured unless you've secured access to them yourself, as shown for example here: github.com/firebase/functions-samples/tree/master/….

– Frank van Puffelen
Jan 3 at 23:00





We can't say anything about whether your functions are secure without seeing them. But if they're HTTP-callable functions they won't be secured unless you've secured access to them yourself, as shown for example here: github.com/firebase/functions-samples/tree/master/….

– Frank van Puffelen
Jan 3 at 23:00












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If you expose any API to a webclient you have to assume it can be used outside of your webapplication aswell. It's then up to you to secure your API & apply the security you see is necessary. Firebase has good documentation & FAQ for you to make up your judgement if you see fit at https://firebase.google.com/



As to per your user-id question, refer to:




Will it be safe to rely on Firebase, for the security of my app data from hackers?




Firebase implements authentication and declarative security rules for security.






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    1 Answer
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    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    If you expose any API to a webclient you have to assume it can be used outside of your webapplication aswell. It's then up to you to secure your API & apply the security you see is necessary. Firebase has good documentation & FAQ for you to make up your judgement if you see fit at https://firebase.google.com/



    As to per your user-id question, refer to:




    Will it be safe to rely on Firebase, for the security of my app data from hackers?




    Firebase implements authentication and declarative security rules for security.






    share|improve this answer




























      2














      If you expose any API to a webclient you have to assume it can be used outside of your webapplication aswell. It's then up to you to secure your API & apply the security you see is necessary. Firebase has good documentation & FAQ for you to make up your judgement if you see fit at https://firebase.google.com/



      As to per your user-id question, refer to:




      Will it be safe to rely on Firebase, for the security of my app data from hackers?




      Firebase implements authentication and declarative security rules for security.






      share|improve this answer


























        2












        2








        2







        If you expose any API to a webclient you have to assume it can be used outside of your webapplication aswell. It's then up to you to secure your API & apply the security you see is necessary. Firebase has good documentation & FAQ for you to make up your judgement if you see fit at https://firebase.google.com/



        As to per your user-id question, refer to:




        Will it be safe to rely on Firebase, for the security of my app data from hackers?




        Firebase implements authentication and declarative security rules for security.






        share|improve this answer













        If you expose any API to a webclient you have to assume it can be used outside of your webapplication aswell. It's then up to you to secure your API & apply the security you see is necessary. Firebase has good documentation & FAQ for you to make up your judgement if you see fit at https://firebase.google.com/



        As to per your user-id question, refer to:




        Will it be safe to rely on Firebase, for the security of my app data from hackers?




        Firebase implements authentication and declarative security rules for security.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jan 3 at 22:55









        joelgullanderjoelgullander

        308113




        308113
































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