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Security Advisory WSO2-2019-0663
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Security Advisory WSO2-2019-0663

Owned by Former user (Deleted)
Last updated: Sept 25, 2020

Published: 1st July 2020

Version: 2.0.0

Severity: Medium

CVSS Score: 5.3 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)


AFFECTED PRODUCTS

WSO2 API Manager : 3.2.0 or earlier
WSO2 IS as Key Manager : 5.10.0 or earlier
WSO2 Identity Server : 5.10.0 or earlier


OVERVIEW

A potential User Enumeration vulnerability has been found in WSO2 products.


DESCRIPTION

This vulnerbility is reproducable only If the showAuthFailureReason parameter is set to true for the BasicAuthenticator. When the basic authenticator is used, if wrong user credentials are entered, an error code is sent in the response params which indicates that the user does not exist in the system.


IMPACT

By leveraging a User Enumeration attack, an attacker can identify valid users of the system and exploit further attacks.


SOLUTION

If you are using an affected product version, it is highly recommended to migrate to the latest released version to receive security fixes.

You may also apply the relevant fixes based on the changes from the public fix: https://github.com/wso2/carbon-identity-framework/pull/2918, https://github.com/wso2-extensions/identity-governance/pull/380, https://github.com/wso2-extensions/identity-event-handler-account-lock/pull/65, https://github.com/wso2-extensions/identity-local-auth-basicauth/pull/72


NOTES

If you are a WSO2 customer with Support Subscription, please use WSO2 Update Manager (WUM) updates in order to apply the fix.

Change Log:

2020-09-24: API Manager 3.2.0 added to the affected product list.


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