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Security Bulletin: Apache Log4j vulnerability impacts IBM Sterling Global Mailbox (CVE-2021-45046)

Security Bulletin


IBM Sterling Global Mailbox is vulnerable to arbitrary code execution due to Apache Log4j (CVE-2021-45046) and is used for logging. Mitigation steps detailed below.

Vulnerability Details

CVEID:   CVE-2021-45046
DESCRIPTION:   Apache Log4j could result in remote code execution, caused by an incomplete fix of CVE-2021-44228 in certain non-default configurations. When the logging configuration uses a non-default Pattern Layout with a Context Lookup, an attacker with control over Thread Context Map (MDC) input data can craft malicious input data using a JNDI Lookup pattern to leak sensitive information and remote code execution in some environments and local code execution in all environments.
CVSS Base score: 9
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Sterling Global Mailbox (GM)6.0.3 to


Product Name/Version

Remediation & Fix

IBM Sterling Global Mailbox 6.0.3-

Download IBM Sterling B2B Integrator IIM version, ,, or on Fix Central

Then apply the fix for global mailbox

Workarounds and Mitigations

IBM strongly recommends addressing the vulnerability now by executing these mitigation steps:


Steps to remove JndiLookup.class from log4j-core*.jar :

 1) Navigate to prerequisite install location -


 2) Issue following command - 

   zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class

 3) Repeat the step #2 for following two locations -

   Navigate to following two locations and run following command

   zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class




Steps to update the GM war file :

 1) Stop GM (mailboxui) Liberty server

 2) Navigate to <SI_INSTALL_LOCATION>/wlp/usr/servers/mailboxui/apps/

 3) Take backup of existing file

 4) Create a temporary folder and copy this war file to this folder. eg. /opt/temp.

 5) Navigate to this temp folder -   cd /opt/temp

 6) Execute following set of commands -

i) <b2biinstall-Jdk-location>/bin/jar -xvf WEB-INF/lib/log4j-core-2.10.0.jar

ii) find ./ -type f -name "log4j-core-*.jar" -exec zip -q -d "{}" org/apache/logging/log4j/core/lookup/JndiLookup.class \;


iii) <b2biinstall-Jdk-location>/bin/jar -uvf WEB-INF/lib/log4j-core-2.10.0.jar


 7) Copy this newly created file to /<SI_INSTALL_LOCATIONA>/wlp/usr/servers/mailboxui/apps/

 8) Start GM (mailbox) Liberty server

Get Notified about Future Security Bulletins




Change History

23 Dec 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.


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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location


[{"Business Unit":{"code":"BU055","label":"Cognitive Applications"},"Product":{"code":"SS6EA4","label":"IBM Global High Availability Mailbox"},"Component":"","Platform":[{"code":"PF016","label":"Linux"},{"code":"PF002","label":"AIX"},{"code":"PF033","label":"Windows"}],"Version":"603x to 61x","Edition":""}]

Document Information

Modified date:
07 February 2022