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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0305
  Security Bulletin: WebSphere Application Server is vulnerable to an XML
       External Entity (XXE) Injection Vulnerability (CVE-2020-4949)
                              27 January 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           WebSphere Application Server
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
                   IBM i
                   z/OS
Impact/Access:     Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-4949  

Original Bulletin: 
   https://www.ibm.com/support/pages/node/6408244

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: WebSphere Application Server is vulnerable to an XML
External Entity (XXE) Injection Vulnerability (CVE-2020-4949)

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: 6408244
Modified date: 25 January 2021


Summary

WebSphere Application Server is vulnerable to an XML External Entity (XXE)
Injection vulnerability. This has been addressed.

Vulnerability Details

CVEID:   CVE-2020-4949
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/
192025 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 PH31727
- --OR--
? Apply Fix Pack 9.0.5.7 or later (targeted availability 1Q2021). 

For V8.5.0.0 through 8.5.5.18:
? Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH31727
? Apply Fix Pack 8.5.5.19 or later (targeted availability 1Q2021).


For V8.0.0.0 through 8.0.0.15:
? Upgrade to 8.0.0.15 and then apply Interim Fix PH31727
 

For V7.0.0.0 through 7.0.0.45:
? Upgrade to 7.0.0.45 and  then apply Interim Fix PH31727
 

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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Subscribe to My Notifications to be notified of important product support
alerts like this.

References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerability was reported to IBM by r00t4dm at Cloud-Penetrating Arrow
Lab, Longofo at Knownsec 404 Team and 0rich1 of Ant Security FG Lab

Change History

25 Jan 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

- --------------------------END INCLUDED TEXT--------------------

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