ESB-2017.1568 - [Cisco] Cisco IOS XR: Root compromise - Existing account 2017-06-22

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1568
  Multiple vulnerabilities have been identified in Cisco IOS XR Software
                               22 June 2017

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

Product:           Cisco IOS XR
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6719 CVE-2017-6718 

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

Comment: This bulletin contains two (2) Cisco Systems security advisories.

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Security Advisory

Cisco IOS XR Software Local Command Injection Vulnerability

Medium

Advisory ID:
cisco-sa-20170621-ios

First Published:
2017 June 21 16:00  GMT

Version 1.0:
Final

Workarounds:
No workarounds available

Cisco Bug IDs:
CSCvb99406
CVE-2017-6719
CWE-20

CVSS Score:
Base 6.7, Temporal 6.7
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2017-6719
CWE-20

Summary

    A vulnerability in the CLI of Cisco IOS XR Software could allow an
    authenticated, local attacker to execute arbitrary commands on the host
    operating system with root privileges.

    The vulnerability is due to insufficient input validation. An attacker
    could exploit this vulnerability by sending crafted input to a command in a
    specific group. A successful exploit could allow the attacker to execute
    arbitrary commands on the affected system with root privileges.

    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-20170621-ios

Affected Products

    Vulnerable Products

    This vulnerability affects Cisco IOS XR Software. 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.

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-20170621-ios

Revision History

     Version   Description		  Section   Status   Date      
    
     1.0       Initial public release.              Final    2017-June-21   

Legal Disclaimer

    THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY 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 AT YOUR OWN RISK. CISCO RESERVES
    THE RIGHT TO CHANGE OR UPDATE THIS 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.

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

- ---

Cisco Security Advisory

Cisco IOS XR Software Privilege Escalation Vulnerability

Medium

Advisory ID:
cisco-sa-20170621-ios1

First Published:
2017 June 21 16:00  GMT

Version 1.0:
Final

Workarounds:
No workarounds available

Cisco Bug IDs:
CSCvb99384
CVE-2017-6718
CWE-20

CVSS Score:
Base 6.7, Temporal 6.7
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2017-6718
CWE-20

Summary

    A vulnerability in the CLI of Cisco IOS XR Software could allow an
    authenticated, local attacker to elevate privileges to the root level.

    The vulnerability is due to incorrect permission settings on binary files
    in the affected software. An attacker could exploit this vulnerability by
    sending crafted commands to the affected device. An exploit could allow the
    attacker to overwrite binaries on the filesystem and elevate privileges to
    root.

    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-20170621-ios1

Affected Products

    Vulnerable Products

    This vulnerability affects Cisco IOS XR Software. 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.

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-20170621-ios1

Revision History

     Version   Description  	          Section   Status   Date      
    
     1.0       Initial public release.              Final    2017-June-21   

Legal Disclaimer

    THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY 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 AT YOUR OWN RISK. CISCO RESERVES
    THE RIGHT TO CHANGE OR UPDATE THIS 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.

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

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