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Category:   Device (Router/Bridge/Hub)  >   Cisco NX-OS Vendors:   Cisco
Cisco NX-OS TCL Sandbox Escape Flaw Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1039936
SecurityTracker URL:  http://securitytracker.com/id/1039936
CVE Reference:   CVE-2017-12336   (Links to External Site)
Date:  Nov 30 2017
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2000, 3000, 3500, 5000, 5500, 5600, 6000, 7000, 7700, 9000, 9500 R Series
Description:   A vulnerability was reported in Cisco NX-OS. A local user can obtain elevated privileges on the target system.

A local user with administrative or tclsh execution privileges can exploit a file validation flaw in the TCL scripting subsystem to escape the scripting sandbox and execute arbitrary commands on the underlying operating system.

The following Nexus series devices are affected:

2000 Series Fabric Extenders
3000 Series Switches
3500 Platform Switches
5000 Series Switches
5500 Platform Switches
5600 Platform Switches
6000 Series Switches
7000 Series Switches
7700 Series Switches
9000 Series Switches in standalone NX-OS mode
9500 R-Series Line Cards and Fabric Modules

The vendor has assigned bug IDs CSCve93750, CSCve93762, CSCve93763, and CSCvg04127 to this vulnerability.

Impact:   A local user with administrative or tclsh execution privileges can execute arbitrary commands on the underlying operating system.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos5

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos5 (Links to External Site)
Cause:   Input validation error

Message History:   None.


 Source Message Contents

Subject:  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos5

 
 


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