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AUSCERT External Security Bulletin Redistribution
ESB-2019.0796
IBM Security Bulletin: Vulnerability in GnuTLS affects Power Hardware
Management Console ( CVE-2018-10845 CVE-2018-10844)
13 March 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Power HMC
Publisher: IBM
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-10845 CVE-2018-10844
Reference: ESB-2019.0545
ESB-2019.0513
ESB-2018.3904
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10794457
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Vulnerability in GnuTLS affects Power Hardware Management Console (
CVE-2018-10845 CVE-2018-10844)
Product: Power HMC
Software version: All Versions
Operating system(s): Platform Independent
Reference #: 0794457
Security Bulletin
Summary
It was found that GnuTLS's implementation of HMAC-SHA-384 and HMAC-SHA-256 was
vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this
flaw to conduct distinguishing attacks and plain text recovery attacks via
statistical analysis of timing data using crafted packets.
Vulnerability Details
CVEID: CVE-2018-10845
DESCRIPTION: GnuTLS could allow a remote attacker to obtain sensitive
information, caused by a flaw in the implementation of HMAC-SHA-384 . By
sending a specially-crafted packet, a remote attacker could exploit this
vulnerability to obtain information.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148730 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:N)
CVEID: CVE-2018-10844
DESCRIPTION: GnuTLS could allow a remote attacker to obtain sensitive
information, caused by a flaw in the implementation of HMAC-SHA-256. By sending
a specially-crafted packet, a remote attacker could exploit this vulnerability
to obtain information.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
148731 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:N)
Affected Products and Versions
Power HMC V8.7.0.0
Power HMC V9.1.910.0
Remediation/Fixes
Remediation/Fixes
The following fixes are available on IBM Fix Central at: http://www-933.ibm.com
/support/fixcentral/
+------------------------------+--------------------------+--------------------------+----------------------------------+
| Product | VRMF | APAR | Remediation/Fix |
+------------------------------+--------------------------+--------------------------+----------------------------------+
| Power HMC | V8.8.7.2 PTF3 ppc | MB04193 | MH01807 |
+------------------------------+--------------------------+--------------------------+----------------------------------+
| Power HMC | V8.8.7.2 PTF3 x86 | MB04192 | MH01806 |
+------------------------------+--------------------------+--------------------------+----------------------------------+
| Power HMC | V9.1.921.0 PTF3 ppc | MB04195 | MH01809 |
+------------------------------+--------------------------+--------------------------+----------------------------------+
| Power HMC | V9.1.920.0 PTF3 x86 | MB04194 | MH01808 |
+------------------------------+--------------------------+--------------------------+----------------------------------+
Workarounds and Mitigations
None
Reference
Complete CVSS v3 Guide
On-line Calculator v3
Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
Initial Version: 3 March 2019
*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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