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AUSCERT External Security Bulletin Redistribution
ESB-2016.1405
Security Bulletin: Multiple vulnerabilities in OpenSSL affect PowerKVM
3 June 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM PowerKVM
Publisher: IBM
Operating System: Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Privileged Data -- Remote with User Interaction
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-2842 CVE-2016-2109 CVE-2016-2108
CVE-2016-2107 CVE-2016-2106 CVE-2016-2105
CVE-2016-0799
Reference: ESB-2016.1076
ESB-2016.0543.2
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=isg3T1023779
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Security Bulletin: Multiple vulnerabilities in OpenSSL affect PowerKVM
Security Bulletin
Document information
More support for:
PowerKVM
Software version:
2.1, 3.1
Operating system(s):
Linux
Software edition:
KVM
Reference #:
T1023779
Modified date:
2016-06-02
Summary
OpenSSL vulnerabilities were disclosed on March 3, 2016 and May 3, 2016 by the
OpenSSL Project. OpenSSL is used by PowerKVM, which has addressed the
applicable CVEs.
Vulnerability Details
CVEID: CVE-2016-2105
DESCRIPTION: OpenSSL is vulnerable to a heap-based buffer overflow, caused by
improper bounds checking by the EVP_EncodeUpdate() function. By sending an
overly long argument, a remote attacker could overflow a buffer and execute
arbitrary code on the system or cause the application to crash.
CVSS Base Score: 5.6
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/112855 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
CVEID: CVE-2016-2106
DESCRIPTION: OpenSSL is vulnerable to a heap-based buffer overflow, caused by
improper bounds checking by the EVP_EncryptUpdate() function. By sending an
overly long argument, a remote attacker could overflow a buffer and execute
arbitrary code on the system or cause the application to crash.
CVSS Base Score: 5.6
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/112856 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
CVEID: CVE-2016-2107
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive
information, caused by an error when the connection uses an AES CBC cipher and
the server support AES-NI. A remote user with the ability to conduct a
man-in-the-middle attack could exploit this vulnerability via the POODLE
(Padding Oracle On Downgraded Legacy Encryption) attack to decrypt traffic.
CVSS Base Score: 4.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/112854 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
CVEID: CVE-2016-2108
DESCRIPTION: OpenSSL could allow a remote attacker to execute arbitrary code
on the system, caused by a buffer underflow when deserializing untrusted ASN.1
structures. An attacker could exploit this vulnerability to corrupt memory and
trigger an out-of-bounds write and execute arbitrary code on the system.
CVSS Base Score: 8.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/112853 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-2016-2109
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a memory
allocation error. By reading specially crafted ASN.1 data from a BIO using
functions such as d2i_CMS_bio(), an attacker could exploit this vulnerability
to consume all available resources and exhaust memory.
CVSS Base Score: 5.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/112857 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:L)
CVEID: CVE-2016-2842
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by the
failure to verify that a certain memory allocation succeeds by the doapr_outch
function. A remote attacker could exploit this vulnerability using a specially
crafted string to cause an out-of-bounds write or consume an overly large
amount of resources.
CVSS Base Score: 7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/111304 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-2016-0799
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive
information, caused by a memory error in the BIO_*printf() functions. An
attacker could exploit this vulnerability using specially crafted data to
trigger an out-of-bounds read.
CVSS Base Score: 3.7
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/111143 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
PowerKVM 2.1 and PowerKVM 3.1
Remediation/Fixes
Customers can update PowerKVM systems by using "yum update".
Fix images are made available via Fix Central. For version 3.1, see
https://ibm.biz/BdHggw for 3.1.0.1 update 2 or later.
For version 2.1, see PowerKVM 2.1.1.3-65. Update 9 at https://ibm.biz/BdEnT8
and all later 2.1.1 service updates. Customers running v2.1 are, in any case,
encouraged to upgrade to v3.1.
For v2.1 systems currently running fix levels of PowerKVM prior to 2.1.1,
please see http://download4.boulder.ibm.com/sar/CMA/OSA/05e4c/0/README for
prerequisite fixes and instructions.
Get Notified about Future Security Bulletins
Subscribe to My Notifications to be notified of important product support
alerts like this.
References
Complete CVSS v3 Guide
On-line Calculator v3
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
9 May 2016 - Initial Version
2 June 2016 - Added CVE-2016-0799 to the description (was fixed by the change
for CVE-2016-2842)
*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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