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Security Advisory WSO2-2020-1130

Published: September 02, 2021

Version: 1.0.0

Severity: Medium

CVSS Score: 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L)

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AFFECTED PRODUCTS

• WSO2 API Manager : 2.6.0 , 3.0.0 , 3.1.0 , 3.2.0
• WSO2 IS as Key Manager : 5.7.0 , 5.9.0 , 5.10.0
• WSO2 Identity Server : 5.7.0 , 5.8.0 , 5.9.0 , 5.10.0

OVERVIEW

Improper OAuth 2.0 tokens validation vulnerability.

DESCRIPTION

The vulnerability leads to treating the access tokens and the refresh tokens of disabled user accounts as active when validated.

IMPACT

Due to this vulnerability, a disabled user with an already issued access token or a refresh token might be able to access resources which are now unauthorized. This may impact the confidentiality, integrity and availability of those resources, depending on the provided functionality.

SOLUTION

If the latest version of the affected WSO2 product is not mentioned under the affected product list, you may migrate to the latest version to receive security fixes.

Otherwise, you may apply the relevant fixes to the product based on the public fix(s):

• https://github.com/wso2-extensions/identity-inbound-auth-oauth/pull/1501

Info

If you are a WSO2 customer with a support subscription, use WSO2 Updates in order to apply the fix.