Operating System:

[Cisco]

Published:

01 September 2016

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.2072
   Cisco Small Business SPA3x/5x Series Denial of Service Vulnerability
                             1 September 2016

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

Product:           Cisco Small Business SPA3x/5x Series IP Phones
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-1469  

Original Bulletin: 
   http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160831-spa

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Cisco Small Business SPA3x/5x Series Denial of Service Vulnerability

High

Advisory ID:

cisco-sa-20160831-spa

First Published:

2016 August 31 16:00 GMT

Version 1.0:

Final

Workarounds:

No workarounds available

Cisco Bug IDs:

CSCut67385

CVSS Score:

Base 7.8, Temporal 6.4

CVE-2016-1469

CWE-399

Summary

A vulnerability in the HTTP framework of Cisco Small Business SPA300 Series IP
Phones, Cisco Small Business SPA500 Series IP Phones, and Cisco SPA51x IP 
Phones could allow an unauthenticated, remote attacker to cause a denial of 
service (DoS) condition on an affected device.

The vulnerability is due to incorrect handling of malformed HTTP traffic. An 
attacker could exploit this vulnerability by sending crafted HTTP requests to
an affected device. An exploit could allow the attacker to deny service 
continually by sending crafted HTTP requests to a phone, resulting in a DoS 
condition.

Cisco has released software updates that address this vulnerability. 
Workarounds that address this vulnerability are not available.

This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160831-spa

Affected Products

Vulnerable Products

This vulnerability affects the following Cisco Small Business IP Phones 
running software release 7.5.7(6) or earlier:

SPA300 Series IP Phones

SPA500 Series IP Phones

SPA51x IP Phones

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

Cisco has released free software updates that address the vulnerability 
described in this advisory. Customers may only install and expect support for
software versions and feature sets for which they have purchased a license. By
installing, downloading, accessing, or otherwise using such software upgrades,
customers agree to follow the terms of the Cisco software license:

http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html

Additionally, customers may only download software for which they have a valid
license, procured from Cisco directly, or through a Cisco authorized reseller
or partner. In most cases this will be a maintenance upgrade to software that
was previously purchased. Free security software updates do not entitle 
customers to a new software license, additional software feature sets, or 
major revision upgrades.

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.

Customers Without Service Contracts

Customers who purchase directly from Cisco but do not hold a Cisco service 
contract and customers who make purchases through third-party vendors but are
unsuccessful in obtaining fixed software through their point of sale should 
obtain upgrades by contacting the Cisco Technical Assistance Center (TAC):

http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

Customers should have the product serial number available and be prepared to 
provide the URL of this advisory as evidence of entitlement to a free upgrade.

Fixed Releases

This vulnerability has been fixed in software releases 7.6.2 and later for 
Cisco Small Business IP Phones.

Customers are advised to download the latest software release from the 
Software Center on Cisco.com.

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

Cisco would like to thank security researcher Chris Watts for discovering and
reporting this vulnerability.

URL

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160831-spa

Revision History

Version Description 		Section Status 	Date

1.0 	Initial public release. -	Final 	2016-August-31

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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