ESB-2018.0188 - [Cisco] Cisco StarOS: Root compromise - Existing account 2018-01-18

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0188
             Cisco StarOS CLI Command Injection Vulnerability
                              18 January 2018

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

Product:           Cisco StarOS
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0115  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-staros

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Cisco Security Advisory

Cisco StarOS CLI Command Injection Vulnerability

Medium

Advisory ID: cisco-sa-20180117-staros

First Published: 2018 January 17 16:00 GMT

Version 1.0: Final

Workarounds: No workarounds available

Cisco Bug IDs:

CSCvf93332

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-2018-0115

CWE-78

Summary

A vulnerability in the CLI of the Cisco StarOS operating system for Cisco ASR
5000 Series routers could allow an authenticated, local attacker to execute 
arbitrary commands with root privileges on an affected host operating system.

The vulnerability is due to insufficient validation of user-supplied input. An
attacker could exploit this vulnerability by injecting malicious command 
arguments into a vulnerable CLI command. A successful exploit could allow the
attacker to execute arbitrary commands with root privileges. To exploit this 
vulnerability, the attacker would need to authenticate to the affected system
by using valid administrator credentials.

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-20180117-staros

Affected Products

Vulnerable Products

This vulnerability affects Cisco StarOS for ASR 5000 Series 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 security testing.

URL

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-staros

Revision History

Version 	Description 		Section 	Status 		Date

1.0 		Initial public release. 		Final 		2018-January-17

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.

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