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Tapplock Smart Lock Insecure Direct Object Reference

Tapplock Smart Lock Insecure Direct Object Reference
Posted Jun 18, 2018
Authored by Vangelis Stykas

Tapplock Smart Lock suffers from multiple insecure direct object reference vulnerabilities.

tags | exploit, vulnerability
MD5 | 763446d7594572376c209584efb7e078

Tapplock Smart Lock Insecure Direct Object Reference

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The server http://api.tapplock.com/ which servers as the api server for the tapplock smart lock is vulnerable to multiple authorization bypasses allowing horizontal escalation of privileges which could lead to the disclosure of all the info of all users and  total compromise of every lock. The attacker could gain access to any lock, and retrieve PII (email and street address) of any user.
There is a full write up available at : https://medium.com/@evstykas/totally-pwning-the-tapplock-smart-lock-the-api-way-c8d89915f025 <https://medium.com/@evstykas/totally-pwning-the-tapplock-smart-lock-the-api-way-c8d89915f025>


Details

Attack Vector: HTTP GET
Prerequisites: Authentication (Authorization Header)
CWE: Insecure Direct Object References, Authorization bypass through user-controlled key
Technical Impact: Horizontal escalation of privilege (one user can view/modify information of all accounts)
Vulnerable query URLs:
http://api.tapplock.com/api/v1/locks/{email}?myOwner=0&page=1&size=10
http://api.tapplock.com/api/v1/shareable_users/{email}?page=1&size=10
http://api.tapplock.com/api/v1/shares/{email}?page=1&size=10
Vulnerable parameter: email


Attack Vector: HTTP GET
Prerequisites: Authentication (Authorization Header)
CWE: Insecure Direct Object References, Authorization bypass through user-controlled key
Technical Impact: Horizontal escalation of privilege (one user can view/modify information of all accounts)
Vulnerable query URLs:
http://api.tapplock.com/api/v1/locks/{email}?myOwner=0&page=1&size=10
http://api.tapplock.com/api/v1/shareable_users/{email}?page=1&size=10
http://api.tapplock.com/api/v1/shares/{email}?page=1&size=10
Vulnerable parameter: email

Attack Vector: HTTP GET
Prerequisites: Authentication (Authorization Header)
CWE: Insecure Direct Object References, Authorization bypass through user-controlled key
Technical Impact: Horizontal escalation of privilege (one user can view/modify information of all accounts)
Vulnerable query URLs:
http://api.tapplock.com/api/v1/finger_owners/{userUuid}?page=1&size=10
http://api.tapplock.com/api/v1/unlock_records/bluetooth/{userUuid}?page=1&size=10
http://api.tapplock.com/api/v1/finger_owners/{userUuid}?page=1&size=10
Vulnerable parameter: userUuid

Attack Vector: HTTP POST
Prerequisites: Authentication (Authorization Header)
CWE: Insecure Direct Object References, Authorization bypass through user-controlled key
Technical Impact: Horizontal escalation of privilege (one user can view/modify information of all accounts)
Vulnerable query URLs:
http://api.tapplock.com/api/v1/users
http://api.tapplock.com/api/v1/locks
http://api.tapplock.com/api/v1/shareable_users
http://api.tapplock.com/api/v1/shares
http://api.tapplock.com/api/v1/finger_owners
http://api.tapplock.com/api/v1/fingers
http://api.tapplock.com/api/v1/fingers/actions/check
http://api.tapplock.com/api/v1/unlock_records/bluetooth
Vulnerable parameter: All the parameters that are posted on the json payload are not checked.


Attack Vector: HTTP PATCH
Prerequisites: Authentication (Authorization Header)
CWE: Insecure Direct Object References, Authorization bypass through user-controlled key
Technical Impact: Horizontal escalation of privilege (one user can view/modify information of all accounts)
Vulnerable query URLs:
http://api.tapplock.com/api/v1/users
http://api.tapplock.com/api/v1/locks
http://api.tapplock.com/api/v1/shareable_users
Vulnerable parameter: All the parameters that are posted on the json payload are not checked.

Attack Vector: HTTP DELETE
Prerequisites: Authentication (Authorization Header)
CWE: Insecure Direct Object References, Authorization bypass through user-controlled key
Technical Impact: Horizontal escalation of privilege (one user can view/modify information of all accounts)
Vulnerable query URLs:
http://api.tapplock.com/api/v1/locks/{lockId}
http://api.tapplock.com/api/v1/finger_owners/{uuid}
http://api.tapplock.com/api/v1/shareable_users/{shareableUserId}
http://api.tapplock.com/api/v1/shares/{shareId}
http://api.tapplock.com/api/v1/fingers/{fingerprintId}

Vulnerable parameter: All the parameters in {} are vulnerable.

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