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Security Bulletin: WebSphere Application Server Java Batch is vulnerable to an XML External Entity Injection (XXE) vulnerability (CVE-2021-20492)

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 Liberty17.0.0.3 - 21.0.0.6
WebSphere Application Server9.0
WebSphere Application Server8.5
WebSphere Application Server8.0

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

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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Document Information

Modified date:
18 June 2021

UID

ibm16456017