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AUSCERT External Security Bulletin Redistribution
ESB-2021.4170
Security Bulletin: WebSphere Application Server is
vulnerable to a Denial of Service (CVE-2021-38951)
9 December 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: WebSphere Application Server
Publisher: IBM
Operating System: AIX
HP-UX
IBM i
Linux variants
Solaris
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-38951
Original Bulletin:
https://www.ibm.com/support/pages/node/6524674
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WebSphere Application Server is vulnerable to a Denial of Service
(CVE-2021-38951)
Document Information
Document number : 6524674
Modified date : 08 December 2021
Product : WebSphere Application Server
Software version : 7.0, 8.0, 8.5, 9.0
Operating system(s): AIX
HP-UX
IBM i
Linux
Solaris
Windows
z/OS
Edition : Advanced,Base,Developer,Enterprise,Express,Network Deployment,Single Server
Summary
WebSphere Application Server is vulnerable to a Denial of Service. This has
been addressed.
Vulnerability Details
CVEID: CVE-2021-38951
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 CPU
resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
211405 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|8.5 |
+----------------------------+----------+
|WebSphere Application Server|8.0 |
+----------------------------+----------+
|WebSphere Application Server|7.0 |
+----------------------------+----------+
Remediation/Fixes
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.5.10:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH41676
- --OR--
. Apply Fix Pack 9.0.5.11 or later (targeted availability 1Q2022).
For V8.5.0.0 through 8.5.5.20:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH41676
- --OR--
. Apply Fix Pack 8.5.5.21 or later (targeted availability 1Q2022).
For V8.0.0.0 through 8.0.0.15:
. Upgrade to 8.0.0.15 and then apply Interim Fix PH41676
For V7.0.0.0 through 7.0.0.45:
. Upgrade to 7.0.0.45 and then apply Interim Fix PH41676
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
Acknowledgement
The vulnerability was reported to IBM by r00t4dm at Cloud-Penetrating Arrow Lab
of Meituan Corp Information Security Department
Change History
08 Dec 2021: Initial Publication
- --------------------------END INCLUDED TEXT--------------------
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