ESB-2019.0830 - [Appliance] System x Blades: Denial of service - Remote/unauthenticated 2019-03-14

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0830
         IBM Security Bulletin: IBM BladeCenter Switch Modules are
           affected by vulnerability in OpenSSL (CVE-2018-0732)
                               14 March 2019

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

Product:           System x Blades
Publisher:         IBM
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0732  

Reference:         ASB-2019.0060
                   ASB-2019.0031
                   ESB-2018.1870
                   ESB-2018.1758

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10875378

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IBM BladeCenter Switch Modules are affected by vulnerability in OpenSSL
(CVE-2018-0732)

Product:             System x Blades

Software version:    All Versions

Operating system(s): Firmware

Reference #:         0875378

Security Bulletin

Summary

IBM BladeCenter Switch Modules have addressed the following vulnerability in
OpenSSL.

Vulnerability Details

CVEID: CVE-2018-0732
DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by the
sending of a very large prime value to the client by a malicious server during
key agreement in a TLS handshake. By spending an unreasonably long period of
time generating a key for this prime, a remote attacker could exploit this
vulnerability to cause the client to hang.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
144658 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Product                                        Affected
                                               Version

IBM 1/10 Gb Uplink Ethernet Switch Module      6.8
IBM 1/10 Gb Uplink Ethernet Switch Module      7.4
IBM BladeCenter Virtual Fabric 10Gb Switch     6.8
Module
IBM BladeCenter Virtual Fabric 10Gb Switch     7.8
Module

Remediation/Fixes

Firmware fix versions are available on Fix Central: http://www.ibm.com/support/
fixcentral/

Product                                        Fix Version

IBM 1/10 Gb Uplink Ethernet Switch Module      6.8.30.0
(ibm_fw_bcsw_110gup-6.8.30.0_anyos_noarch)
IBM 1/10 Gb Uplink Ethernet Switch Module      7.4.20.0
(ibm_fw_bcsw_110gup-7.4.20.0_anyos_noarch)
IBM BladeCenter Virtual Fabric 10Gb Switch     6.8.30.0
Module
(ibm_fw_bcsw_24-10g-6.8.30.0_anyos_noarch)
IBM BladeCenter Virtual Fabric 10Gb Switch     7.8.17.0
Module
(ibm_fw_bcsw_24-10g-7.8.17.0_anyos_noarch)

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

Lenovo Product Security Advisories

Change History

12 March 2019: Initial 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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