ESB-2017.2255 - [Cisco] Cisco IOS XE Software: Multiple vulnerabilities 2017-09-07

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2255
          Cisco IOS XE Software for Cisco ASR 920 Series Routers
                         Multiple Vulnerabilities
                             7 September 2017

===========================================================================

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

Product:           Cisco IOS XE Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Overwrite Arbitrary Files       -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-6796 CVE-2017-6795 

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-asr920-1
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-asr920-2

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

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

Cisco IOS XE Software for Cisco ASR 920 Series Routers Arbitrary Command 
Execution Vulnerability

Medium

Advisory ID: cisco-sa-20170906-asr920-1

First Published: 2017 September 6 16:00 GMT

Version 1.0: Final

Workarounds: No workarounds available

Cisco Bug IDs:

CSCve48949

CVSS Score:

Base 6.7

Base 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-2017-6796

CWE-78

Summary

A vulnerability in the USB-modem code of Cisco IOS XE Software running on 
Cisco ASR 920 Series Aggregation Services Routers could allow an 
authenticated, local attacker to inject and execute arbitrary commands on the
underlying operating system of an affected device.

The vulnerability is due to improper input validation of the platform usb 
modem command in the CLI of the affected software. An attacker could exploit 
this vulnerability by modifying the platform usb modem command in the CLI of 
an affected device. A successful exploit could allow the attacker to inject 
and execute arbitrary commands on the underlying operating system of an 
affected device.

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-20170906-asr920-1

Affected Products

Vulnerable Products

This vulnerability affects Cisco IOS XE Software running on Cisco ASR 920 
Series Aggregation Services Routers. 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.

URL

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-asr920-1

Revision History

Version Description Section Status Date

1.0 Initial public release. - Final 2017-September-06

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 IOS XE Software for Cisco ASR 920 Series Routers Arbitrary File 
Overwrite Vulnerability

Medium

Advisory ID: cisco-sa-20170906-asr920-2

First Published: 2017 September 6 16:00 GMT

Version 1.0: Final

Workarounds: No workarounds available

Cisco Bug IDs:

CSCvf10783

CVSS Score:

Base 4.4

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-2017-6795

CWE-20

Summary

A vulnerability in the USB-modem code of Cisco IOS XE Software running on 
Cisco ASR 920 Series Aggregation Services Routers could allow an 
authenticated, local attacker to overwrite arbitrary files on the underlying 
operating system of an affected device.

The vulnerability is due to improper input validation of the platform usb 
modem command in the CLI of the affected software. An attacker could exploit 
this vulnerability by modifying the platform usb modem command in the CLI of 
an affected device. A successful exploit could allow the attacker to overwrite
arbitrary files on the underlying operating system of an affected device.

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-20170906-asr920-2

Affected Products

Vulnerable Products

This vulnerability affects Cisco IOS XE Software running on Cisco ASR 920 
Series Aggregation Services Routers. 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.

URL

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-asr920-2

Revision History

Version 	Description 		Section Status 	Date

1.0 		Initial public release. -	Final 	2017-September-06

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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=q76R
-----END PGP SIGNATURE-----

« Back to bulletins