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Zoho ManageEngine ADManager Plus through 7186 is vulnerable to 2FA bypass.
Zoho ManageEngine Active Directory 360 versions 4315 and below, ADAudit Plus 7202 and below, ADManager Plus 7200 and below, Asset Explorer 7002 and below, Cloud Security Plus 4161 and below, Data Security Plus 6110 and below, Eventlog Analyzer 12301 and below, Exchange Reporter Plus 5709 and below, Log360 5315 and below, Log360 UEBA 4045 and below, M365 Manager Plus 4529 and below, M365 Security Plus 4529 and below, Recovery Manager Plus 6061 and below, ServiceDesk Plus 14302 and below, ServiceDesk Plus MSP 14300 and below, SharePoint Manager Plus 4402 and below and Support Center Plus 14300 and below are vulnerable to the authentication bypass vulnerability via a few authenticators.
Zoho ManageEngine Active Directory 360 versions 4315 and below, ADAudit Plus 7202 and below, ADManager Plus 7200 and below, Asset Explorer 6993 and below and 7xxx 7002 and below, Cloud Security Plus 4161 and below, Data Security Plus 6110 and below, Eventlog Analyzer 12301 and below, Exchange Reporter Plus 5709 and below, Log360 5315 and below, Log360 UEBA 4045 and below, M365 Manager Plus 4529 and below, M365 Security Plus 4529 and below, Recovery Manager Plus 6061 and below, ServiceDesk Plus 14204 and below and 143xx 14302 and below, ServiceDesk Plus MSP 14300 and below, SharePoint Manager Plus 4402 and below, and Support Center Plus 14300 and below are vulnerable to 2FA bypass via a few TOTP authenticators. Note: A valid pair of username and password is required to leverage this vulnerability.
CVSS 3.1 Base Score 9.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The following code intends to ensure that the user is already logged in. If not, the code performs authentication with the user-provided username and password. If successful, it sets the loggedin and user cookies to "remember" that the user has already logged in. Finally, the code performs administrator tasks if the logged-in user has the "Administrator" username, as recorded in the user cookie.
}
}ExitError("Error: you need to log in first");
););DoAdministratorTasks();Unfortunately, this code can be bypassed. The attacker can set the cookies independently so that the code does not check the username and password. The attacker could do this with an HTTP request containing headers such as:
[body of request]By setting the loggedin cookie to "true", the attacker bypasses the entire authentication check. By using the "Administrator" value in the user cookie, the attacker also gains privileges to administer the software.
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