Security Bulletin
Summary
There is a vulnerability in the Apache MyFaces library used by WebSphere Application Server Liberty.
Vulnerability Details
CVEID: CVE-2021-26296
DESCRIPTION: Apache MyFaces is vulnerable to cross-site request forgery, caused by improper validation of user-supplied input. By persuading an authenticated user to visit a malicious Web site, a remote attacker could send a malformed HTTP request to perform unauthorized actions. An attacker could exploit this vulnerability to perform cross-site scripting attacks, Web cache poisoning, and other malicious activities.
CVSS Base score: 8.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197017 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Affected Products and Versions
This vulnerability affects all versions of Liberty for Java in IBM Cloud up to and including v3.55.
Remediation/Fixes
The fix is included in Liberty for Java v3.56-20210409-1236 alternate WebSphere Application Server Liberty runtime.
To upgrade to Liberty for Java v3.56-20210409-1236 or higher:
1. Use the alternate WebSphere Application Server Liberty runtime by setting the following parameters
ibmcloud cf set-env <appname> JBP_CONFIG_LIBERTY "version: +"
ibmcloud cf set-env <appname> IBM_LIBERTY_MONTHLY true
2. Re-stage or re-push your application
To find the current version of Liberty for Java in IBM Cloud being used, from the command-line Cloud Foundry client by running the following commands:
cf ssh <appname> -c cat "staging_info.yml"
Look for the following lines:
{“detected_buildpack”:“Liberty for Java(TM) (WAR, liberty-21.0.0_3, buildpack-v3.55-20210311-1642, ibmjdk-1.8.0_sr6fp26-20210216, env)“,”start_command”:“.liberty/initial_startup.rb”}
To re-stage your application using the command-line Cloud Foundry client, use the following command:
cf restage <appname>
To re-push your application using the command-line Cloud Foundry client, use the following command:
cf push <appname>
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
26 Apr 2021: Updated Remediation/Fixes Section
22 Apr 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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
07 October 2022
Initial Publish date:
22 April 2021
UID
ibm16446257