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AUSCERT External Security Bulletin Redistribution
ESB-2021.0473
Security Bulletin: WebSphere Application Server is vulnerable to an XML
External Entity (XXE) Injection vulnerability (CVE-2021-20353)
10 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: WebSphere Application Server
Publisher: IBM
Operating System: Windows
Linux variants
AIX
HP-UX
Solaris
IBM i
z/OS
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20353
Original Bulletin:
https://www.ibm.com/support/pages/node/6413709
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Security Bulletin: WebSphere Application Server is vulnerable to an XML
External Entity (XXE) Injection vulnerability (CVE-2021-20353)
Document Information
More support for: 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
Document number: 6413709
Modified date: 09 February 2021
Summary
WebSphere Application Server is vulnerable to an XML External Entity (XXE)
Injection vulnerability. This has been addressed.
Vulnerability Details
CVEID: CVE-2021-20353
DESCRIPTION: IBM WebSphere Application Server is vulnerable to an 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/
194882 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 |
+----------------------------+----------+
|WebSphere Application Server|7.0 |
+----------------------------+----------+
Remediation/Fixes
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.5.6:
? Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH33228
- --OR--
? Apply Fix Pack 9.0.5.7 or later (targeted availability 1Q2021).
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 PH33228
- --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 PH33228
For V7.0.0.0 through 7.0.0.45:
? Upgrade to 7.0.0.45 and then apply Interim Fix PH33228
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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References
Complete CVSS v3 Guide
On-line Calculator v3
Off
Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
09 Feb 2021: 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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