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AUSCERT External Security Bulletin Redistribution
ESB-2021.3396
Security Bulletin:Liberty for Java for IBM Cloud is
vulnerable to Information Disclosure (CVE-2021-29842)
14 October 2021
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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
ESB-2021.3124
Original Bulletin:
https://www.ibm.com/support/pages/node/6498143
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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
Summary
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
17.0.0.3 through 21.0.0.9 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.
Remediation/Fixes
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,
spring-auto-reconfiguration-1.12.0_RELEASE)","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
Change History
12 Oct 2021: Initial Publication
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