ESB-2018.3619 - [Win][Linux][IBM i][HP-UX][Solaris][AIX] IBM WebSphere Application Server: Denial of service - Existing account 2018-11-21

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3619
        Potential XML External Entity (XXE) Injection Vulnerability
                      in WebSphere Application Server
                             21 November 2018

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

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

Product:           IBM WebSphere Application Server
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   IBM i
                   Linux variants
                   Solaris
                   Windows
                   z/OS
Impact/Access:     Denial of Service        -- Existing Account
                   Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1905  

Original Bulletin: 
   https://www.ibm.com/support/docview.wss?uid=ibm10738721

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

Security Bulletin: Potential XML External Entity (XXE) Injection Vulnerability
in WebSphere Application Server (CVE-2018-1905)

Security Bulletin

Document information

More support for: WebSphere Application Server

Software version: 9.0

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS

Software edition: Advanced, Base, Developer, Enterprise, Express, Network
Deployment, Single Server

Reference #: 0738721

Modified date: 20 November 2018

Summary

There is a potential XXE injection vulnerability in the Knowledge Center used
by WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-1905
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: 7.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152534 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM WebSphere
Application Server:

  o Version 9.0

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF
containing the APAR for each named product as soon as practical.

For WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.0.9:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH04192
- --OR--
. Apply Fix Pack 9.0.0.10 or later (targeted availability 4Q 2018).

Important Note

IBM strongly suggests that all System z customers be subscribed to the System z
Security Portal to receive the latest critical System z security and integrity
service. If you are not subscribed, see the instructions on the System z
Security web site. Security and integrity APARs and associated fixes will be
posted to this portal. IBM suggests reviewing the CVSS scores and applying all
security or integrity fixes as soon as possible to minimize any potential risk.

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The vulnerability was reported to IBM by Benoit Cote-Jodoin from GoSecure

Change History

20 November 2018: original document published

*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.

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

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=1rXV
-----END PGP SIGNATURE-----

« Back to bulletins