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AUSCERT External Security Bulletin Redistribution
ESB-2020.0509
WebSphere Application Server is vulnerable to a denial of
service (CVE-2019-4720)
14 February 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: WebSphere Application Server
Publisher: IBM
Operating System: AIX
HP-UX
IBM i
Linux variants
Mac OS
Solaris
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4720
Reference: ESB-2020.0455
ESB-2020.0382
Original Bulletin:
https://www.ibm.com/support/pages/node/1285372
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Bulletin: WebSphere Application Server 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 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.
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) |
+------------------------------------+-------------------+
|WebSphere Application Server |9.0 |
+------------------------------------+-------------------+
|WebSphere Application Server |7.0 |
+------------------------------------+-------------------+
|WebSphere Application Server |8.0 |
+------------------------------------+-------------------+
|WebSphere Application Server |8.5 |
+------------------------------------+-------------------+
|WebSphere Application Server Liberty|Continuous Delivery|
+------------------------------------+-------------------+
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 PH19528
- --OR--
. Apply Fix Pack 20.0.0.2 or later (targeted availability 1Q2020).
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.5.2:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH19528
- --OR--
. Apply Fix Pack 9.0.5.3 or later (targeted availability 1Q2020).
For V8.5.0.0 through 8.5.5.17:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH19528
- --OR--
. Apply Fix Pack 8.5.5.18 or later (targeted availability 3Q2020).
For V8.0.0.0 through 8.0.0.15:
. Upgrade to 8.0.0.15 and then apply Interim Fix PH19528
For V7.0.0.0 through 7.0.0.45:
. Upgrade to 7.0.0.45 and then apply Interim Fix PH19528
Additional interim fixes may be available and linked off the interim fix
download page.
WebSphere Application Server V7.0 and V8.0 are no longer in full support; IBM
recommends upgrading to a fixed, supported version/release/platform of the
product.
Workarounds and Mitigations
None
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