ESB-2017.3110 - [Win][Linux][AIX] IBM Support Assistant Team Server: Denial of service - Existing account 2017-12-06

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.3110
          Security Bulletin:Multiple vulnerabilities in IBM Java
             Runtime affect IBM Support Assistant Team Server
                              6 December 2017

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

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

Product:           IBM Support Assistant Team Server
Publisher:         IBM
Operating System:  AIX
                   Linux variants
                   Windows
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-9843 CVE-2016-9842 CVE-2016-9841
                   CVE-2016-9840  

Reference:         ASB-2017.0173
                   ESB-2017.3032
                   ESB-2017.3017
                   ESB-2017.2915

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg22011294

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Security Bulletin:Multiple vulnerabilities in IBM Java Runtime affect IBM 
Support Assistant Team Server

Security Bulletin

Document information

More support for: IBM Support Assistant

Team Server

Software version: 5.0, 5.0.1.0, 5.0.1.1, 5.0.2.0, 5.0.2.1, 5.0.2.2, 5.0.2.3, 
5.0.2.4, 5.0.2.5

Operating system(s): AIX, Linux, Windows

Software edition: TeamServer

Reference #: 2011294

Modified date: 05 December 2017

Summary

There are multiple vulnerabilities in IBM Runtime Environment Java Version 
1.8.0 used by IBM Support Assistant Team Server. These issues were disclosed 
as part of the IBM Java SDK updates in Apr 2017.

Vulnerability Details

If you run your own Java code using the IBM Java Runtime delivered with this 
product, you should evaluate your code to determine whether the complete list
of vulnerabilities are applicable to your code. For a complete list of 
vulnerabilities please refer to the link for IBM Java SDK Security Bulletin" 
located in the References section for more information.

CVEID: CVE-2016-9840

DESCRIPTION: zlib is vulnerable to a denial of service, caused by an 
out-of-bounds pointer arithmetic in inftrees.c. By persuading a victim to open
a specially crafted document, a remote attacker could exploit this 
vulnerability to cause a denial of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/120508 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-9841

DESCRIPTION: zlib is vulnerable to a denial of service, caused by an 
out-of-bounds pointer arithmetic in inftrees.c. By persuading a victim to open
a specially crafted document, a remote attacker could exploit this 
vulnerability to cause a denial of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/120509 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-9842

DESCRIPTION: zlib is vulnerable to a denial of service, caused by an undefined
left shift of negative number. By persuading a victim to open a specially 
crafted document, a remote attacker could exploit this vulnerability to cause
a denial of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/120510 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-9843

DESCRIPTION: zlib is vulnerable to a denial of service, caused by a big-endian
out-of-bounds pointer. By persuading a victim to open a specially crafted 
document, a remote attacker could exploit this vulnerability to cause a denial
of service.

CVSS Base Score: 3.3

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/120511 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM Support Assistant Team Server version 5.0.0 - 5.0.2.5

Remediation/Fixes

The recommended solution is to install the new IBM Support Assistant Team 
Server 5.0.2.5.

For V5.0.0 through 5.0.2.4 IBM recommends upgrading to IBM Support Assistant 
Team Server 5.0.2.5

Workarounds and Mitigations

None

References

Complete CVSS v3 Guide

On-line Calculator v3

IBM Java SDK Security Bulletin

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

None

Change History

8 December 2017: Original Version 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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