CVE-2021-38900 - Incorrect Authorization

Severity

65%

Complexity

27%

Confidentiality

60%

IBM Business Process Manager 8.5 and 8.6 and IBM Business Automation Workflow 18.0, 19.0, 20.0 and 21.0 could allow a privileged user to obtain highly sensitive information due to improper access controls. IBM X-Force ID: 209607.

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

CVSS 2.0 Base Score 4. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:S/C:P/I:N/A:N).

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

Type

IBM Business

First reported 3 years ago

2021-12-21 19:15:00

Last updated 3 years ago

2021-12-27 16:31:00

Affected Software

IBM Business Automation Workflow 18.0.0.0

18.0.0.0

IBM Business Automation Workflow 18.0.0.1

18.0.0.1

IBM Business Automation Workflow 18.0.0.2

18.0.0.2

IBM Business Automation Workflow 19.0.0.0

19.0.0.0

IBM Business Automation Workflow 19.0.0.1

19.0.0.1

IBM Business Process Manager (BPM) 8.5.0.0

8.5.0.0

IBM Business Process Manager 8.6.0.0

8.6.0.0

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