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Security Bulletin: 3RD PARTY IBM InfoSphere MDM Inspector - Cross Site Request Forgery

Security Bulletin


Summary

In the MDM Inspector web application, CSRF protection is implemented by validating that the referer header is set to a whitelisted domain. It is possible to include the whitelisted domain as a subdomain of an attacker-controlled domain to bypass this validation, allowing for a CSRF attack to be launched from the attacker-controlled domain. Example attacker-domain that would be accepted by an Inspector application hosted on example.internal: example.internal.attacker.com. As the validation is not performed on the entirety of the referer header, the application will accept example.internal.attacker.com as a valid referer, allowing for CSRF to be performed from this domain.

Vulnerability Details

CVEID:   CVE-2020-4675
DESCRIPTION:   IBM InfoSphere Master Data Management Server is vulnerable to cross-site request forgery which could allow an attacker to execute malicious and unauthorized actions transmitted from a user that the website trusts.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/186324 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
InfoSphere Master Data Management11.6

Remediation/Fixes

Approach 1 : Client can avoid security(psirt) issue, by giving proper whitelist-param in web.xml. i.e. its ended by '/'
eg: instead of https://accounts.google.com ---->> https://accounts.google.com**/**

Approach 2: Apply iFix provided by MDM team

Workarounds and Mitigations

Approach 1 : Client can avoid security(psirt) issue, by giving proper whitelist-param in web.xml. i.e. its ended by '/'
eg: instead of https://accounts.google.com ---->> https://accounts.google.com**/**

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

The vulnerability was reported to IBM by Chris Kent on behalf of e-Secure Pty Ltd

Change History

18 May 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location

Worldwide

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Document Information

Modified date:
15 July 2021

UID

ibm16472927