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AUSCERT External Security Bulletin Redistribution
Potential XML External Entity (XXE) Injection Vulnerability
in WebSphere Application Server
21 November 2018
AusCERT Security Bulletin Summary
Product: IBM WebSphere Application Server
Operating System: AIX
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
CVE Names: CVE-2018-1905
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Security Bulletin: Potential XML External Entity (XXE) Injection Vulnerability
in WebSphere Application Server (CVE-2018-1905)
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
There is a potential XXE injection vulnerability in the Knowledge Center used
by WebSphere Application Server.
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
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
o Version 9.0
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 V220.127.116.11 through 18.104.22.168:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH04192
. Apply Fix Pack 22.214.171.124 or later (targeted availability 4Q 2018).
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.
Complete CVSS v3 Guide
On-line Calculator v3
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
The vulnerability was reported to IBM by Benoit Cote-Jodoin from GoSecure
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.
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.
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