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AUSCERT External Security Bulletin Redistribution
ESB-2019.1735
Potential denial of service vulnerability in Liberty for
Java for IBM Cloud (CVE-2019-4046)
15 May 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Liberty for Java for Bluemix
Publisher: IBM
Operating System: Linux variants
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4046
Reference: ESB-2019.1693
ESB-2019.1497
ESB-2019.1483
ESB-2019.1307
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10882816
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Potential denial of service vulnerability in Liberty for Java for IBM Cloud
(CVE-2019-4046)
Product: Liberty for Java for Bluemix
Software version: All Versions
Operating system(s): Linux
Reference #: 0882816
Security Bulletin
Summary
There is a potential denial of service vulnerability in WebSphere Application
Server.
Vulnerability Details
CVEID: CVE-2019-4046
DESCRIPTION: IBM WebSphere Application Server is vulnerable to a denial of
service, caused by improper handling of request headers. A remote attacker
could exploit this vulnerability to cause the consumption of Memory.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
156242 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
This vulnerability affects all versions of Liberty for Java in IBM Cloudup to
and including v3.30.
Remediation/Fixes
To upgrade to Liberty for Java v3.31-20190423-1354 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-18.0.0_3,
buildpack-v3.25-20180918-1034, ibmjdk-1.8.0_20180214, 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
Monitor IBM Cloud Status for Future Security Bulletins
Monitor the security notifications on the IBM Cloud Status page to be advised
of future security bulletins.
Change History
29 April 2019: original document published
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