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AUSCERT External Security Bulletin Redistribution
ESB-2021.1326
Security Bulletin: WebSphere Application Server is vulnerable to an XML
External Entity (XXE) Injection vulnerability (CVE-2021-20453)
20 April 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: WebSphere Application Server
Publisher: IBM
Operating System: AIX
Windows
Linux variants
Solaris
HP-UX
IBM i
z/OS
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: None
CVE Names: CVE-2021-20453
Original Bulletin:
https://www.ibm.com/support/pages/node/6445171
Comment: This advisory references vulnerabilities in products which run on
platforms other than IBM. It is recommended that administrators
running WebSphere Application Server check for an updated version of
the software for their operating system.
- --------------------------BEGIN INCLUDED TEXT--------------------
WebSphere Application Server is vulnerable to an XML External Entity (XXE)
Injection vulnerability (CVE-2021-20453)
Document Information
Document number : 6445171
Modified date : 19 April 2021
Product : WebSphere Application Server
Software version : 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 an XML External Entity (XXE)
Injection vulnerability. This has been addressed.
Vulnerability Details
CVEID: CVE-2021-20453
DESCRIPTION: IBM WebSphere Application Server is vulnerable to a XML External
Entity Injection (XXE) attack when processing XML data. A remote attacker could
exploit this vulnerability to expose sensitive information or consume memory
resources.
CVSS Base score: 8.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
196648 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L)
Affected Products and Versions
+----------------------------+----------+
|Affected Product(s) |Version(s)|
+----------------------------+----------+
|WebSphere Application Server|9.0 |
+----------------------------+----------+
|WebSphere Application Server|8.5 |
+----------------------------+----------+
|WebSphere Application Server|8.0 |
+----------------------------+----------+
Remediation/Fixes
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.5.7:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH34067
- --OR--
. Apply Fix Pack 9.0.5.8 or later (targeted availability 2Q2021).
For V8.5.0.0 through 8.5.5.19:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH34067
- --OR--
. Apply Fix Pack 8.5.5.20 or later (targeted availability 3Q2021).
For V8.0.0.0 through 8.0.0.15:
. Upgrade to 8.0.0.15 and then apply Interim Fix PH34067
Additional interim fixes may be available and linked off the interim fix
download page.
WebSphere Application Server V8.0 is no longer in full support; IBM recommends
upgrading to a fixed, supported version/release/platform of the product.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Complete CVSS v3 Guide
On-line Calculator v3
Off
Acknowledgement
This vulnerability was reported to IBM by r00t4dm at Cloud-Penetrating Arrow
Lab, Longofo of Knownsec 404 Team
Change History
19 Apr 2021: Initial Publication
- --------------------------END INCLUDED TEXT--------------------
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