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AUSCERT External Security Bulletin Redistribution
ESB-2019.0961
Security Bulletin: Potential denial of service vulnerability
in WebSphere Application Server (CVE-2019-4046)
22 March 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM WebSphere Application Server
Publisher: IBM
Operating System: AIX
HP-UX
IBM i
Linux variants
Solaris
Windows
z/OS
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4046
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10869570
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Security Bulletin: Potential denial of service vulnerability in WebSphere
Application Server (CVE-2019-4046)
Document information
More support for: WebSphere Application Server
Software version: 9.0, 8.5, 8.0, 7.0, Liberty
Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS
Software edition: Advanced, Base, Developer, Enterprise, Express, Network
Deployment, Single Server
Reference #: 0869570
Modified date: 21 March 2019
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 the following versions and releases of IBM
WebSphere Application Server:
o Liberty
o Version 9.0
o Version 8.5
o Version 8.0
o Version 7.0
Remediation/Fixes
The recommended solution is to apply the interim fix, Fix Pack or PTF
containing the APAR for each named product as soon as practical.
For WebSphere Application Server Liberty:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH06340
- --OR--
. Apply Fix Pack 19.0.0.4 or later (targeted availability 2Q 2018).
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.0.10:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH06340
- --OR--
. Apply Fix Pack 9.0.0.11 or later (targeted availability 2Q 2018).
For V8.5.0.0 through 8.5.5.15
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH06340
- --OR--
. Apply Fix Pack 8.5.5.16 or later (targeted availability 4Q 2019).
For V8.0.0.0 through 8.0.0.15:
. Upgrade to v8.0.0.15 and then apply Interim Fix PH06340
For V7.0.0.0 through 7.0.0.45:
. Upgrade to 7.0.0.45 and then apply Interim Fix PH06340
WebSphere Application Server V7 and V8 are no longer in full support; IBM
recommends upgrading to a fixed, supported version/release/platform of the
product.
Change History
21 March 2019: original document published
*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.
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