Security Advisory WSO2-2020-1139

Published: February 08, 2021

Version: 1.0.0

Severity: Medium

CVSS Score: 4.7 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N)

AFFECTED PRODUCTS

  • WSO2 API Manager : 2.6.0 , 3.0.0 , 3.1.0 , 3.2.0
  • WSO2 API Manager Analytics : 2.6.0
  • WSO2 IoT Server : 3.3.1

OVERVIEW

HTTP request headers get reflected in the response to the client.

DESCRIPTION

When an HTTP based API request returns an error or when an HTTP OPTIONS call is made, request headers are returning back to the client as response headers, without any filtration from the server.

IMPACT

By leveraging this vulnerability, a malicious actor could set response header values in a way that might harm an unsuspecting user.

SOLUTION

If you are using an affected product version, it is highly recommended to migrate to the latest released 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/carbon-apimgt/pull/9524
  • https://github.com/wso2/product-apim/pull/9650

Info

If you are a WSO2 customer with a support subscription, use WSO2 Update Manager(WUM) updates in order to apply the fix to the affected versions.