CVE-2018-11142 - Incorrect Authorization

Severity

21%

Complexity

39%

Confidentiality

48%

The 'systemui/settings_network.php' and 'systemui/settings_patching.php' scripts in the Quest KACE System Management Appliance 8.0.318 are accessible only from localhost. This restriction can be bypassed by modifying the 'Host' and 'X_Forwarded_For' HTTP headers in a POST request. An anonymous user can abuse this vulnerability to execute critical functions without authorization.

The 'systemui/settings_network.php' and 'systemui/settings_patching.php' scripts in the Quest KACE System Management Appliance 8.0.318 are accessible only from localhost. This restriction can be bypassed by modifying the 'Host' and 'X_Forwarded_For' HTTP headers in a POST request. An anonymous user can abuse this vulnerability to execute critical functions without authorization.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:P).

Demo Examples

Incorrect Authorization

CWE-863

The following code could be for a medical records application. It displays a record to already authenticated users, confirming the user's authorization using a value stored in a cookie.


               
}
}
setcookie("role", $role, time()+60*60*2);
die("\n");
DisplayMedicalHistory($_POST['patient_ID']);
die("You are not Authorized to view this record\n");

The programmer expects that the cookie will only be set when getRole() succeeds. The programmer even diligently specifies a 2-hour expiration for the cookie. However, the attacker can easily set the "role" cookie to the value "Reader". As a result, the $role variable is "Reader", and getRole() is never invoked. The attacker has bypassed the authorization system.

Overview

First reported 6 years ago

2018-05-31 18:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Quest KACE System Management Appliance 8.0.318

8.0.318

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