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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2457
  Brocade Fabric OS (FOS) Advisory vulnerabilities affect Brocade 8Gb SAN
         Switch Module for BladeCenter and IBM Flex System FC5022
                         16Gb SAN Scalable Switch
                                4 July 2019

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

Product:           IBM PureFlex System & Flex System
Publisher:         IBM
Operating System:  Network Appliance
Impact/Access:     Root Compromise          -- Existing Account            
                   Denial of Service        -- Remote/Unauthenticated      
                   Access Confidential Data -- Remote/Unauthenticated      
                   Unauthorised Access      -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-6442 CVE-2018-6441 CVE-2018-6440
                   CVE-2018-6439 CVE-2018-6438 CVE-2018-6437
                   CVE-2018-6436 CVE-2018-6435 CVE-2018-6434
                   CVE-2018-6433  

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10888177

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Brocade Fabric OS (FOS) Advisory vulnerabilities affect Brocade 8Gb SAN Switch
Module for BladeCenter and IBM Flex System FC5022 16Gb SAN Scalable Switch

Product:             PureFlex System & Flex System
Component:           Machine Types: 8721,8724,7893
Software version:    All Versions
Operating system(s): Firmware
Reference #:         0888177

Security Bulletin

Summary

The following Brocade Fabric OS (FOS) vulnerabilities have been addressed by
Brocade 8Gb SAN Switch Module for BladeCenter and IBM Flex System FC5022 16Gb
SAN Scalable Switch.

Vulnerability Details

CVEID: CVE-2018-6442
DESCRIPTION: Broadcom Brocade Fabric OS could allow a remote authenticated
attacker to execute arbitrary commands on the system, caused by a flaw in the
Brocade Webtools firmware update section. By sending specially-crafted
arguments, an attacker could exploit this vulnerability to execute arbitrary
commands on the system.
CVSS Base Score: 8.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152758 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-6441
DESCRIPTION: Broadcom Brocade Fabric OS could allow a local attacker to bypass
security restrictions, caused by a flaw in the Secure Shell implementation. By
sending a specially-crafted argument, an attacker could exploit this
vulnerability to provide arbitrary environment variables and bypass the
restricted configuration shell.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152757 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2018-6440
DESCRIPTION: Broadcom Brocade Fabric OS could allow a remote attacker to obtain
sensitive information, caused by a flaw in the proxy service. By sending a
specially-crafted request, a remote attacker could exploit this vulnerability
to obtain sensitive information or cause a denial of service condition.
CVSS Base Score: 7.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152909 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L)

CVEID: CVE-2018-6439
DESCRIPTION: Broadcom Fabric OS could allow a local attacker to bypass security
restrictions, caused by a flaw in the configdownload command in the command
line interface. By sending a specially-crafted request, an attacker could
exploit this vulnerability to escape the restricted shell and gain root access.
CVSS Base Score: 6.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
153836 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

CVEID: CVE-2018-6438
DESCRIPTION: Broadcom Brocade Fabric OS could allow a local attacker to gain
elevated privileges on the system, caused by a flaw in the supportsave command
by the command line interface (CLI). By sending a specially-crafted request, an
attacker could exploit this vulnerability to obtain root shell access.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152800 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-6437
DESCRIPTION: Broadcom Brocade Fabric OS could allow a local attacker to gain
elevated privileges on the system, caused by a flaw in the help command by the
command line interface (CLI). By sending a specially-crafted request, an
attacker could exploit this vulnerability to obtain root shell access.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152799 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-6436
DESCRIPTION: Broadcom Brocade Fabric OS could allow a local attacker to gain
elevated privileges on the system, caused by a flaw in the firmwaredownload
command by the command line interface (CLI). By sending a specially-crafted
request, an attacker could exploit this vulnerability to obtain root shell
access.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152798 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-6435
DESCRIPTION: Broadcom Brocade Fabric OS could allow a local attacker to gain
elevated privileges on the system, caused by a flaw in the secryptocfg command.
By sending specially-crafted arguments, an attacker could exploit this
vulnerability to escape the restricted shell and gain root access.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152756 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-6434
DESCRIPTION: Broadcom Brocade Fabric OS could could allow a remote attacker to
hijack a user''s session. By persuading a victim to click on a
specially-crafted Web site, an attacker could exploit this vulnerability using
the web management interface to gain access to another user''s session.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152755 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:N)

CVEID: CVE-2018-6433
DESCRIPTION: Broadcom Brocade Fabric OS could allow a local attacker to bypass
security restrictions, caused by a flaw in the ecryptocfg export command. By
sending a specially-crafted argument, an attacker could exploit this
vulnerability to perform arbitrary file copy from source to a remote system.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
152752 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

Product                                                             Affected Version

IBM Flex System FC5022 16Gb SAN Scalable Switch Firmware            8.0

Fabric OS firmware for Brocade 8Gb SAN Switch Module                7.4


Remediation/Fixes

Product                                                             Fixed Version

IBM Flex System FC5022 16Gb SAN Scalable Switch Firmware            8.2.1
(brcd_fw_bcsw_8.2.1_anyos_noarch)

Fabric OS firmware for Brocade 8Gb SAN Switch Module                7.4.2d
(brcd_fw_bcsw_7.4.2d_anyos_noarch)

Workarounds and Mitigations

None

Brocade Security Advisories

Change History

21 June 2019: Initial version published

                     Cross reference information
             Product               Component Platform Version Edition
BladeCenter->BladeCenter H Chassis           Firmware

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