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WS-2019-0498

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Date: February 11, 2019

Passbolt implements a mechanism to verify the server's authenticity. The /auth/verify.json endpoint used to verify the server's authenticity returns a JSON that displays errors that occurred during the request. An attacker could use this unauthenticated endpoint to enumerate users registered on a Passbolt instance. They could retrieve a huge list of PGP public keys (by scrapping a widely-populated HKP server) and try every fingerprint to list potential users. This vulnerability has a low impact. It requires an attacker to know the victim's public key's fingerprint.

Language: PHP

Severity Score

Severity Score

Weakness Type (CWE)

Improper Authorization

CWE-285

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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