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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0727
         IBM Security Bulletin: Multiple Security Vulnerabilities
           Affect IBM WebSphere Application Server in IBM Cloud
                               7 March 2019

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

Product:           IBM WebSphere Application Server
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated      
                   Increased Privileges            -- Existing Account            
                   Denial of Service               -- Remote/Unauthenticated      
                   Cross-site Request Forgery      -- Remote with User Interaction
                   Access Confidential Data        -- Remote/Unauthenticated      
                   Provide Misleading Information  -- Existing Account            
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10237 CVE-2018-1996 CVE-2018-1957
                   CVE-2018-1926 CVE-2018-1905 CVE-2018-1904
                   CVE-2018-1901  

Reference:         ESB-2019.0590
                   ESB-2019.0547
                   ESB-2019.0491.2
                   ESB-2019.0371

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10793597

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Multiple Security Vulnerabilities Affect IBM WebSphere Application Server in
IBM Cloud

Product:             WebSphere Application Server in IBM Cloud

Software version:    All Versions

Operating system(s): Linux

Reference #:         0793597

Security Bulletin

Summary

There are multiple security vulnerabilities that affect the IBM WebSphere
Application Server in the IBM Cloud.

There is a timing window where there could be a privilege escalation
vulnerability in WebSphere Application Server. There is a potential remote code
execution vulnerability in WebSphere Application Server. There is a potential
cross-site request forgery in WebSphere Application Server Admin Console. There
is a potential XXE injection vulnerability in the Knowledge Center used by
WebSphere Application Server. There is a potential information disclosure in
WebSphere Application Server. There is a potential for weaker than expected
security in WebSphere Application Server with SP800-131 transition mode and
SSL_TLSv2. There is a potential denial of service with the Google Guava library
that is used in WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-1901
DESCRIPTION: IBM WebSphere Application Server could allow a remote attacker to
temporarily gain elevated privileges on the system, caused by incorrect cached
value being used.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152530 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2018-1904
DESCRIPTION: IBM WebSphere Application Server could allow remote attackers to
execute arbitrary Java code through an administrative client class with a
serialized object from untrusted sources.
CVSS Base Score: 8.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152533 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

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)

CVEID: CVE-2018-1926
DESCRIPTION: IBM WebSphere Application Server Admin Console is vulnerable to
cross-site request forgery, caused by improper validation of user-supplied
input. By persuading a user to visit a malicious URL, a remote attacker could
send a specially-crafted request. An attacker could exploit this vulnerability
to perform CSRF attack and update available applications.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152992 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)

CVEID: CVE-2018-1957
DESCRIPTION: IBM WebSphere Application Server could allow sensitive information
to be available caused by mishandling of data by the application based on an
incorrect return by the httpServletRequest#authenticate() API when an
unprotected URI is accessed.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
153629 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2018-1996
DESCRIPTION: IBM WebSphere Application Server could provide weaker than
expected security, caused by the improper TLS configuration. A remote attacker
could exploit this vulnerability to obtain sensitive information using man in
the middle techniques.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
154650

for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2018-10237
DESCRIPTION: Google Guava is vulnerable to a denial of service, caused by
improper eager allocation checks in the AtomicDoubleArray and CompoundOrdering
class. By sending a specially-crafted data, a remote attacker could exploit
this vulnerability to cause a denial of service condition.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
142508 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

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

  o Liberty
  o Version 9.0
  o Version 8.5

Remediation/Fixes

To patch an existing service instance, refer to the IBM WebSphere Application
Server bulletins listed below

  o Potential Privilege Escalation Vulnerability in WebSphere Application
    Server (CVE-2018-1901)
  o Potential Remote code execution vulnerability in WebSphere Application
    Server (CVE-2018-1904)
  o Potential XML External Entity (XXE) Injection Vulnerability in WebSphere
    Application Server (CVE-2018-1905)
  o Potential cross-site request forgery in WebSphere Application Server Admin
    Console (CVE-2018-1926)
  o Potential information disclosure in WebSphere Application Server
    (CVE-2018-1957)
  o Weaker than expected security in WebSphere Application Server with
    SP800-131 transition mode (CVE-2018-1996)
  o Potential denial of service in WebSphere Application Server
    (CVE-2018-10237)

Please see Updating your environment in the KnowlegeCenter for information on
applying service.

Alternatively, delete the vulnerable service instance and create a new
instance.

Workarounds and Mitigations

None.

Additional Bluemix Alert Information

Monitor the Bluemix console ( https://console.ng.bluemix.net/status/ ) for
additional important product alerts.

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

The CVE-2018-1904 vulnerability was reported to IBM by noxxx of Chaitin Tech
The CVE-2018-1905 vulnerability was reported to IBM by Benoit Cote-Jodoin from
GoSecure

Change History

05 March 2019: 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.

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