ESB-2017.2936 - [Cisco] Cisco Spark Board: Increased privileges - Existing account 2017-11-16

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2936
   Cisco Spark Board Upgrade Signature Verification Bypass Vulnerability
                             16 November 2017

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

Product:           Cisco Spark Board
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12306  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-spark

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Cisco Spark Board Upgrade Signature Verification Bypass Vulnerability

Medium

Advisory ID:
 
cisco-sa-20171115-spark

First Published:
2017 November 15 16:00  GMT
 
Version 1.0:
Final

Workarounds:
No workarounds available

Cisco Bug IDs:
CSCvf84502
CVE-2017-12306
CWE-16

CVSS Score:
Base 4.4
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:X/RL:X/RC:X
CVE-2017-12306
CWE-16

Summary
 
A vulnerability in the upgrade process of Cisco Spark Board could
allow an authenticated, local attacker to install an unverified
upgrade package.
The vulnerability is due to insufficient upgrade package validation.
An attacker could exploit this vulnerability by providing the upgrade
process with an upgrade package that the attacker controls. An exploit
could allow the attacker to install custom firmware to the Spark
Board.
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-20171115-spark

Affected Products
 
Vulnerable Products
  
This vulnerability affects Cisco Spark Board. For information about
affected software releases, consult the Cisco bug ID(s) at the top of
this advisory.

Products Confirmed Not Vulnerable
 
No other Cisco products are currently known to be affected by this
vulnerability.

Workarounds
 
There are no workarounds that address this vulnerability.

Fixed Software
  
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.

Exploitation and Public Announcements
  
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
 
 
This vulnerability was found during internal testing.
 Cisco Security Vulnerability Policy
 
 
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.
Subscribe to Cisco Security Notifications
Subscribe
 URL
 
 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20171115-spark
 Revision History
 
 
Version
Description
Section
Status
Date
1.0
Initial public release.

Final
2017-November-15
Show Less
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KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
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DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that
omits the distribution URL is an uncontrolled copy and may lack
important information or contain factual errors. The information in
this document is intended for end users of Cisco products.

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