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Security Bulletin
Summary
WebSphere Application Server Java Batch is vulnerable to an XML External Entity Injection (XXE) vulnerability. This has been addressed.
Vulnerability Details
CVEID: CVE-2021-20492
DESCRIPTION: IBM WebSphere Application Server Java Batch 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: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197793 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| WebSphere Application Server Liberty | 17.0.0.3 - 21.0.0.6 |
| WebSphere Application Server | 9.0 |
| WebSphere Application Server | 8.5 |
| WebSphere Application Server | 8.0 |
Remediation/Fixes
The recommended solution is to apply the interim fix or Fix Pack containing APAR for each named product as soon as practical.
For WebSphere Application Server Liberty 17.0.0.3 - 21.0.0.6 using the batchManagement-1.0 feature:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH34906
--OR--
· Apply Liberty Fix Pack 21.0.0.7 or later (targeted availability 3Q2021).
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 PH34906
--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 PH34906
--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 PH34906
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
Off
Acknowledgement
This vulnerability was reported to IBM by Kylinking
Change History
25 May 2021: Initial Publication
16 June 2021: Updated Liberty versions
18 June 2021: Interim fixes added for Liberty 21.0.0.6
*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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
More support for:
WebSphere Application Server
Software version:
Liberty
Operating system(s):
AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS, Mac OS
Document number:
6456017
Modified date:
18 June 2021
UID
ibm16456017
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