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AUSCERT External Security Bulletin Redistribution
ESB-2019.0715
Cisco Nexus 9000 Series Fabric Switches Application-Centric
Infrastructure Mode Multiple Vulnerabilities
7 March 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Nexus 9000 Fabric Switches
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1588 CVE-2019-1585
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-aci-controller-privsec
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-aci-file-read
Comment: This bulletin contains two (2) security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Nexus 9000 Series Fabric Switches Application-Centric Infrastructure Mode
Privilege Escalation Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190306-aci-controller-privsec
First Published: 2019 March 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvn09838
CVE-2019-1585
CWE-16
CVSS Score:
6.7 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o A vulnerability in the controller authorization functionality of Cisco
Nexus 9000 Series ACI Mode Switch Software could allow an authenticated,
local attacker to escalate standard users with root privilege on an
affected device.
The vulnerability is due to a misconfiguration of certain sudoers files for
the bashroot component on an affected device. An attacker could exploit
this vulnerability by authenticating to the affected device with a crafted
user ID, which may allow temporary administrative access to escalate
privileges. A successful exploit could allow the attacker to escalate
privileges on an affected device.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190306-aci-controller-privsec
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Nexus 9000 Series Fabric Switches in ACI
mode running an affected version of Cisco NX-OS Software.
For information about affected software releases, consult the Cisco bug ID
(s) at the top of this advisory.
Determining the Cisco NX-OS Software Release
Administrators can determine the release of Cisco NX-OS Software running on
a device by using the show version command in the device CLI. The following
example identifies the 11.2(2) Release:
nxos-n9k-aci# show version
Cisco Nexus Operating System (NX-OS) Software
such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and http://www.opensource.org/licenses/lgpl-2.1.php
Software
BIOS: version N/A
kickstart: version 11.2(2) [build 11.2(1.184)]
system: version 11.2(2) [build 11.2(1.184)]
.
.
.
Determining the Cisco Application Policy Infrastructure Controller Software
Release
There is a one-to-one mapping between the software for Cisco Application
Policy Infrastructure Controller (APIC) and Cisco Nexus 9000 Series Fabric
Switches in ACI mode. To determine which Cisco APIC Software release is
running on a device, administrators can disregard the leftmost digit of the
Cisco NX-OS Software version number. In the preceding example, the output
shows Cisco NX-OS Software version 11.2(2) , which maps to Cisco APIC
Software Release 1.2(2) .
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Cisco has determined that this vulnerability does not affect the following
Cisco products:
Firepower 2100 Series Firewalls
Firepower 4100 Series Next-Generation Firewalls
Firepower 9300 Security Appliance
MDS 9000 Series Multilayer Director Switches
Nexus 1000V Switch for Microsoft Hyper-V
Nexus 1000V Switch for VMware vSphere
Nexus 2000 Series Fabric Extenders
Nexus 3000 Series Switches
Nexus 3500 Platform Switches
Nexus 3600 Platform Switches
Nexus 5000 Series Switches
Nexus 5500 Platform Switches
Nexus 5600 Platform Switches
Nexus 7000 Series Switches
Nexus 7700 Series Switches
Nexus 9000 Series Switches in standalone NX-OS mode
Nexus 9500 R-Series Line Cards and Fabric Modules
UCS 6200 Series Fabric Interconnects
UCS 6300 Series Fabric Interconnects
UCS 6400 Series Fabric Interconnects
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o For information about fixed software releases , consult the Cisco bug ID(s)
at the top of this advisory.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts page , to determine exposure and a
complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
Additional Resources
For help determining the best Cisco NX-OS Software release for a Cisco
Nexus Switch, administrators can refer to the following Recommended
Releases documents. If a security advisory recommends a later release,
Cisco recommends following the advisory guidance.
Cisco MDS Series Switches
Cisco Nexus 1000V for VMware Switch
Cisco Nexus 3000 Series and 3500 Series Switches
Cisco Nexus 5000 Series Switches
Cisco Nexus 5500 Platform Switches
Cisco Nexus 6000 Series Switches
Cisco Nexus 7000 Series Switches
Cisco Nexus 9000 Series Switches
Cisco Nexus 9000 Series ACI-Mode Switches
For help determining the best Cisco NX-OS Software release for Cisco UCS,
refer to the Recommended Releases documents in the release notes for the
device.
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
o Cisco would like to thank Octav Opaschi with DETACK GmbH for reporting this
vulnerability.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190306-aci-controller-privsec
Revision History
o +---------+--------------------------+---------+--------+----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+----------------+
| 1.0 | Initial public release. | - | Final | 2019-March-06 |
+---------+--------------------------+---------+--------+----------------+
===============================================================================
Cisco Nexus 9000 Series Fabric Switches Application-Centric Infrastructure Mode
Arbitrary File Read Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20190306-aci-file-read
First Published: 2019 March 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvm52064
CVE-2019-1588
CWE-20
CVSS Score:
4.4 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the Cisco Nexus 9000 Series Fabric Switches running in
Application-Centric Infrastructure (ACI) mode could allow an authenticated,
local attacker to read arbitrary files on an affected device.
The vulnerability is due to a lack of proper input and validation checking
mechanisms of user-supplied input sent to an affected device. A successful
exploit could allow the attacker unauthorized access to read arbitrary
files on an affected device.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190306-aci-file-read
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Nexus 9000 Series Fabric Switches in ACI
mode when they are running an affected release of Cisco NX-OS Software.
For information about affected software releases, consult the Cisco bug ID
(s) at the top of this advisory.
Determining the Cisco NX-OS Software Release
Administrators can determine the release of Cisco NX-OS Software running on
a device by using the show version command in the device CLI. The following
example identifies the 11.2(2) Release:
nxos-n9k-aci# show version
Cisco Nexus Operating System (NX-OS) Software
such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and http://www.opensource.org/licenses/lgpl-2.1.php
Software
BIOS: version N/A
kickstart: version 11.2(2) [build 11.2(1.184)]
system: version 11.2(2) [build 11.2(1.184)]
.
.
.
Determining the Cisco Application Policy Infrastructure Controller Software
Release
There is a one-to-one mapping between the software for Cisco Application
Policy Infrastructure Controller (APIC) and Cisco Nexus 9000 Series Fabric
Switches in ACI mode. To determine which Cisco APIC Software release is
running on a device, administrators can disregard the leftmost digit of the
Cisco NX-OS Software version number. In the preceding example, the output
shows Cisco NX-OS Software version 11.2(2) , which maps to Cisco APIC
Software Release 1.2(2) .
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Cisco has determined that this vulnerability does not affect the following
Cisco products:
Firepower 2100 Series Firewalls
Firepower 4100 Series Next-Generation Firewalls
Firepower 9300 Security Appliance
MDS 9000 Series Multilayer Director Switches
Nexus 1000V Switch for Microsoft Hyper-V
Nexus 1000V Switch for VMware vSphere
Nexus 2000 Series Fabric Extenders
Nexus 3000 Series Switches
Nexus 3500 Platform Switches
Nexus 3600 Platform Switches
Nexus 5000 Series Switches
Nexus 5500 Platform Switches
Nexus 5600 Platform Switches
Nexus 7000 Series Switches
Nexus 7700 Series Switches
Nexus 9000 Series Switches in standalone NX-OS mode
Nexus 9500 R-Series Line Cards and Fabric Modules
UCS 6200 Series Fabric Interconnects
UCS 6300 Series Fabric Interconnects
UCS 6400 Series Fabric Interconnects
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o For information about fixed software releases , consult the Cisco bug ID(s)
at the top of this advisory.
When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories and Alerts page , to determine exposure and a
complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
Additional Resources
For help determining the best Cisco NX-OS Software release for a Cisco
Nexus Switch, administrators can refer to the following Recommended
Releases documents. If a security advisory recommends a later release,
Cisco recommends following the advisory guidance.
Cisco MDS Series Switches
Cisco Nexus 1000V for VMware Switch
Cisco Nexus 3000 Series and 3500 Series Switches
Cisco Nexus 5000 Series Switches
Cisco Nexus 5500 Platform Switches
Cisco Nexus 6000 Series Switches
Cisco Nexus 7000 Series Switches
Cisco Nexus 9000 Series Switches
Cisco Nexus 9000 Series ACI-Mode Switches
For help determining the best Cisco NX-OS Software release for Cisco UCS,
refer to the Recommended Releases documents in the release notes for the
device.
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
o Cisco would like to thank Nicolas Biscos and Gaetan Ferry from Synacktiv
for reporting this vulnerability.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20190306-aci-file-read
Revision History
o +---------+--------------------------+---------+--------+----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+----------------+
| 1.0 | Initial public release. | - | Final | 2019-March-06 |
+---------+--------------------------+---------+--------+----------------+
- --------------------------END INCLUDED TEXT--------------------
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