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AUSCERT External Security Bulletin Redistribution
ESB-2019.3205
Cisco UCS Director and Cisco UCS Director Express for Big
Data API Authentication Bypass Vulnerability
22 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco UCS Director
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1938
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-ucsd-authbypass
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Cisco UCS Director and Cisco UCS Director Express for Big Data API
Authentication Bypass Vulnerability
Priority: Critical
Advisory ID: cisco-sa-20190821-ucsd-authbypass
First Published: 2019 August 21 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvp69746
CVE-2019-1938
CWE-287
CVSS Score:
9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o
A vulnerability in the web-based management interface of Cisco UCS Director
and Cisco UCS Director Express for Big Data could allow an unauthenticated,
remote attacker to bypass authentication and execute arbitrary actions with
administrator privileges on an affected system.
The vulnerability is due to improper authentication request handling. An
attacker could exploit this vulnerability by sending crafted HTTP requests
to an affected device. A successful exploit could allow an unprivileged
attacker to access and execute arbitrary actions through certain APIs.
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-20190821-ucsd-authbypass
Affected Products
o Vulnerable Products
This vulnerability affects the following Cisco products:
UCS Director releases 6.7.0.0 and 6.7.1.0
UCS Director Express for Big Data releases 3.7.0.0 and 3.7.1.0
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 confirmed that this vulnerability does not affect the following
Cisco software releases and product:
UCS Director releases earlier than 6.7.0.0
UCS Director Express for Big Data releases earlier than 3.7.0.0
Integrated Management Controller Supervisor
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale
should obtain upgrades by contacting the Cisco TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
upgrade.
Fixed Releases
Cisco fixed this vulnerability in the following software releases:
Cisco UCS Director 6.7.2.0 and later (recommended: 6.7.3.0)
Cisco UCS Director Express for Big Data 3.7.2.0 and later (recommended:
3.7.3.0)
Customers can download Cisco UCS Director software from the Software Center
at Cisco.com by doing the following:
1. Click Browse all .
2. Choose Servers - Unified Computing > UCS Director > UCS Director 6.7 .
3. Access releases by using the left pane of the UCS Director 6.7 page.
Customers can download Cisco UCS Director Express for Big Data software
from the Software Center at Cisco.com by doing the following:
1. Click Browse all .
2. Choose Servers - Unified Computing > UCS Director > UCS Director
Express for Big Data 3.7 .
3. Access releases by using the left pane of the UCS Director Express for
Big Data 3.7 page.
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 This vulnerability was found during internal security testing.
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-20190821-ucsd-authbypass
Revision History
o +---------+--------------------------+---------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2019-August-21 |
+---------+--------------------------+---------+--------+-----------------+
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