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             AUSCERT External Security Bulletin Redistribution

            Security Bulletin:Liberty for Java for IBM Cloud is
           vulnerable to Information Disclosure (CVE-2021-29842)
                              14 October 2021


        AusCERT Security Bulletin Summary

Product:           Liberty for java
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-29842  

Reference:         ESB-2021.3171

Original Bulletin: 

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Security Bulletin:Liberty for Java for IBM Cloud is vulnerable to Information
Disclosure (CVE-2021-29842)

Document Information

Document number    : 6498143
Modified date      : 12 October 2021
Product            : Liberty for Java
Software version   : All
Operating system(s): Linux


IBM WebSphere Application Server Liberty is vulnerable to Information Exposure.

Vulnerability Details

CVEID: CVE-2021-29842
DESCRIPTION: IBM WebSphere Application Server 7.0, 8.0, 8.5, 9.0 and Liberty through could allow a remote user to enumerate usernames due
to a difference of responses from valid and invalid login attempts. IBM X-Force
ID: 205202.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
205202 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

These vulnerabilities affect all versions of Liberty for Java in IBM Cloud up
to and including v3.61.


To upgrade to Liberty for Java v3.62-20210922-1852 or higher, you must 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_9,
buildpack-v3.62-20210922-1852, ibmjdk-1.8.0_sr6fp36-20210824, env,

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


Change History

12 Oct 2021: Initial Publication

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