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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS XR Command Injection and File Overwrite Flaws Let Local Users Obtain Root Privileges
SecurityTracker Alert ID:  1038741
SecurityTracker URL:  http://securitytracker.com/id/1038741
CVE Reference:   CVE-2017-6718, CVE-2017-6719   (Links to External Site)
Date:  Jun 21 2017
Impact:   Execution of arbitrary code via local system, Modification of system information, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): IOS XR 6.2.1.BASE
Description:   Two vulnerabilities were reported in Cisco IOS XR. A local user can obtain root privileges on the target system.

A local user can send specially crafted data to a command in a specific group to trigger an input validation flaw and execute arbitrary commands on the target system with root privileges [CVE-2017-6718].

A local user can send specially crafted commands to trigger a file permissions error and overwrite binaries on the target system to gain root privileges [CVE-2017-6719].

The vendor has assigned bug IDs CSCvb99406 and CSCvb99384 to these vulnerabilities.

Impact:   A local user can obtain root privileges on the target system.
Solution:   The vendor has issued a fix.

The vendor advisories are available at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170621-ios
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170621-ios1

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170621-ios (Links to External Site)
Cause:   Access control error, Input validation error

Message History:   None.


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