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Security Bulletin: IBM API Connect is affected by authentication bypass vulnerability in LoopBack (CVE-2018-1778)

Security Bulletin


Summary

API Connect has addressed the following vulnerability.

IBM LoopBack could allow an attacker to bypass authentication if the AccessToken Model is exposed over a REST API, because it is then possible for anyone to create an AccessToken for any User, provided they know the userID and can hence get access to the other users data / access to their privileges (if the user happens to be an Admin for example).

Vulnerability Details

CVEID: CVE-2018-1778
DESCRIPTION: IBM LoopBack could allow an attacker to bypass authentication if the AccessToken Model is exposed over a REST API, it is then possible for anyone to create an AccessToken for any User provided they know the userID and can hence get access to the other users data / access to their privileges (if the user happens to be an Admin for example).
CVSS Base Score: 7.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148801 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L)
 

Affected Products and Versions

IBM API Connect 2018.1-2018.4.1
IBM API Connect 5.0.8.0-5.0.8.4

Remediation/Fixes

IBM API Connect V2018.1 - 2018.4.1 2018.4.1.1 LI80357

Addressed in IBM API Connect V2018.4.1.1 release.

Follow this link and find the appropriate packages for your deployment.

http://www.ibm.com/support/fixcentral/swg/quickorder?parent=ibm%7EWebSphere&product=ibm/WebSphere/IBM+API+Connect&release=2018.3.7&platform=All&function=all&source=fc
IBM API Connect V5.0.0.0 - 5.0.8.4 5.0.8.5 LI80357

Addressed in IBM API Connect V5.0.8.5 fix pack.

Follow this link and find the appropriate packages for your deployment.
http://www.ibm.com/support/fixcentral/swg/quickorder?parent=ibm%7EWebSphere&product=ibm/WebSphere/IBM+API+Connect&release=5.0.8.4&platform=All&function=all&source=fc

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Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

Pointed out by @zbarbutos via Gitter

Change History

December 17, 2018: Original bulletin published.

*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 information

More support for: IBM API Connect

Component: Loopback

Software version: 5.0.8.0-5.0.8.4, 2018.1-2018.4.1

Operating system(s): Platform Independent

Reference #: 0733883

Modified date: 17 December 2018