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Security Bulletin: Liberty for Java for IBM Cloud is vulnerable to a denial of service (CVE-2019-4720)

Security Bulletin


Summary

There is a denial of service vulnerablility in WebSphere Application Server.

Vulnerability Details

CVEID:   CVE-2019-4720
DESCRIPTION:   IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available memory. IBM X-Force ID: 172125.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/172125 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
Liberty for Java3.37

Remediation/Fixes

To upgrade to Liberty for Java 3.42-20200311-1540 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-19.0.0_9, buildpack-v3.37-20191002-1726, ibmjdk-1.8.0_sr5fp41-20190919, 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

Off

Change History

16 Mar 2020: 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

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.

Document Location

Worldwide

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Document Information

Modified date:
17 March 2020

UID

ibm15967987