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AUSCERT External Security Bulletin Redistribution
ESB-2017.3231
Libxml2 patched in IBM Cognos Metrics Manager
19 December 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Cognos Metrics Manager
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
Solaris
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-16932 CVE-2017-16931 CVE-2017-9050
CVE-2017-9049 CVE-2017-7375 CVE-2016-4658
Reference: ESB-2017.2376.2
ESB-2016.2213
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg22011764
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Bulletin: Multiple vulnerabilities in Libxml2 affect IBM Cognos
Metrics Manager.
Security Bulletin
Document information
Software version: 10.2, 10.2.1, 10.2.2
Operating system(s): AIX, HP-UX, Linux, Solaris, Windows
Reference #: 2011764
Modified date: 18 December 2017
Summary
Vulnerabilities have been addressed in the Libxml2 component of IBM Cognos
Metrics Manager.
Vulnerability Details
CVEID: CVE-2016-4658
DESCRIPTION: The libxml2 library, as used in multiple products, could allow a
remote attacker to execute arbitrary code on the system, caused by a memory
corruption error. An attacker could exploit this vulnerability using a
specially crafted XML document to execute arbitrary code on the system or cause
a denial of service.
CVSS Base Score: 9.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
117175 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2017-7375
DESCRIPTION: libxml2 could allow a remote attacker to obtain sensitive
information, caused by missing validation for external entities in
xmlParsePEReference. By sending specially-crafted XML data, an attacker could
exploit this vulnerability to obtain sensitive information or cause a denial of
service.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
128275 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:N/A:L)
CVEID: CVE-2017-9050
DESCRIPTION: libxml2 is vulnerable to a heap-based buffer overflow, caused by a
buffer over-read flaw in the xmlDictAddString function in dict.c. By sending a
specially-crafted request, a local attacker could overflow a buffer and cause
the application to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
126277 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:L/A:L)
CVEID: CVE-2017-9049
DESCRIPTION: libxml2 is vulnerable to a heap-based buffer overflow, caused by a
buffer over-read flaw in the xmlDictComputeFastKey function in dict.c. By
sending a specially-crafted request, a local attacker could overflow a buffer
and cause the application to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
126276 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:L/A:L)
CVEID: CVE-2017-16932
DESCRIPTION: Xmlsoft libxml2 is vulnerable to a denial of service, caused by an
infinite recursion issue in parameter entities. By sending a specially-crafted
request, a remote attacker could exploit this vulnerability to exhaust
available memory on the system.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
135489 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)
CVEID: CVE-2017-16931
DESCRIPTION: Xmlsoft libxml2 is vulnerable to a buffer overflow, caused by
improper handling of parameter-entity references in xmlParserHandlePEReference
function. By using a percent character in a DTD name, a remote attacker could
overflow a buffer and execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
135488 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Affected Products and Versions
* IBM Cognos Metrics Manager 10.2.2
* IBM Cognos Metrics Manager 10.2.1
* IBM Cognos Metrics Manager 10.2
Remediation/Fixes
The recommended solution is to apply the fix as soon as practical. As the fix
is in a shared component across the Business Intelligence portfolio, applying
the BI Interim Fix will resolve the issue. Note that the prerequisites named in
the links are also satisfied by an IBM Cognos Metrics Manager install of the
same version.
+-----------------------------------------------------------------------------+
|* |Version |Interim Fix |
|-----------------------+----------+------------------------------------------|
|IBM Cognos Metrics |10.2.2 |IBM Cognos Business Intelligence 10.2.2 |
|Manager | |Interim Fix 17 |
|-----------------------+----------+------------------------------------------|
|IBM Cognos Metrics |10.2.1 |IBM Cognos Business Intelligence 10.2.1 |
|Manager | |Interim Fix 22 |
|-----------------------+----------+------------------------------------------|
|IBM Cognos Metrics |10.2 |IBM Cognos Business Intelligence 10.2 |
|Manager | |Interim Fix 25 |
+-----------------------------------------------------------------------------+
Workarounds and Mitigations
None
Change History
18 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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