Security Bulletin: Vulnerabilities in HAProxy Watson Knowledge Catalog for IBM Cloud Pak for Data

Summary

Multiple vulnerabilities in HAProxy distributed as part of Watson Knowledge Catalog for IBM Cloud Pak for Data. The issues are now addressed.

Vulnerability Details

CVEID:CVE-2021-39241
**DESCRIPTION:**HAProxy could allow a remote attacker to bypass security restrictions, caused by improper input validation by the “:method” field. By sending a specially-crafted request, an attacker could exploit this vulnerability to allow a request to be routed to a wrong server.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/207699 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

CVEID:CVE-2021-39242
**DESCRIPTION:**HAProxy could allow a remote attacker to bypass security restrictions, caused by the mishandling of mismatch between “:authority” and “Host” headers. By sending a specially-crafted request, an attacker could exploit this vulnerability to control the HTTP Host header.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/207700 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

CVEID:CVE-2021-39240
**DESCRIPTION:**HAProxy could allow a remote attacker to obtain sensitive information, caused by improper validatiing if scheme and path portions of a URI have the expected characters. By sending a specially-crafted request, an attacker could exploit this vulnerability to see a different authority or URL prefix, and use this information to launch further attacks against the affected system.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/207698 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Remediation/Fixes

Watson Knowledge Catalog for IBM Cloud Pak for Data 4.0: install Refresh 2 of Cloud Pak for Data Version 4.0: <https://www.ibm.com/docs/en/cloud-paks/cp-data/4.0?topic=overview-whats-new#whats-new__refresh2&gt;

Watson Knowledge Catalog for IBM Cloud Pak for Data 3.5.1: install Refresh 10 of Cloud Pak for Data Version 3.5: <https://www.ibm.com/docs/en/cloud-paks/cp-data/3.5.0?topic=overview-whats-new#whats-new__refresh-10&gt;

Watson Knowledge Catalog for IBM Cloud Pak for Data 3.0: No fix available but you can upgrade to Watson Knowledge Catalog for IBM Cloud Pak for Data 3.5.7 or 4.0.2 or higher

Workarounds and Mitigations

The HAProxy service is not exposed outside of the OpenShift cluster hosting Cloud Pak for Data which is limiting the ability to exploit this vulnerability.