ESB-2018.1693 - [Cisco] Cisco IP Phone 6800, 7800, and 8800 Series: Denial of service - Remote/unauthenticated 2018-06-07

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1693
  Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware
        Session Initiation Protocol Denial of Service Vulnerability
                                7 June 2018

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

Product:           Cisco IP Phone 6800, 7800, and 8800 Series
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0316  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-multiplatform-sip

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Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware Session
Initiation Protocol Denial of Service Vulnerability

High
Advisory ID: cisco-sa-20180606-multiplatform-sip
First Published: 2018 June 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi24718

CVSS Score: Base 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:X/RL:X/RC:X
CVE-2018-0316
CWE-399

Summary

  o A vulnerability in the Session Initiation Protocol (SIP) call-handling
    functionality of Cisco IP Phone 6800, 7800, and 8800 Series Phones with
    Multiplatform Firmware could allow an unauthenticated, remote attacker to
    cause an affected phone to reload unexpectedly, resulting in a temporary
    denial of service (DoS) condition.

    The vulnerability exists because the firmware of an affected phone
    incorrectly handles errors that could occur when an incoming phone call is
    not answered. An attacker could exploit this vulnerability by sending a set
    of maliciously crafted SIP packets to an affected phone. A successful
    exploit could allow the attacker to cause the affected phone to reload
    unexpectedly, resulting in a temporary DoS condition.

    Cisco has released software updates that address this vulnerability. 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-20180606-multiplatform-sip

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco IP Phone 6800, 7800, and 8800 Series
    Phones with Multiplatform Firmware if they are running a Multiplatform
    Firmware release prior to Release 11.1(2).

    Products Confirmed Not Vulnerable

    Only products listed in the Vulnerable Products section of this advisory
    are known to be affected by this vulnerability.

Workarounds

  o There are no workarounds that address this vulnerability.

Fixed Software

  o 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: https://www.cisco.com/c/en/us/products/
    end-user-license-agreement.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 TAC: https://www.cisco.com/c
    /en/us/support/web/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 is fixed in Multiplatform Firmware Releases 11.1(2) and
    later for Cisco IP Phone 6800, 7800, and 8800 Series Phones. Customers are
    advised to download the latest firmware release by visiting the Software
    Center on Cisco.com and navigating to Collaboration Endpoints > IP Phones >
    IP Phones with Multiplatform Firmware.

Exploitation and Public Announcements

  o 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

  o This vulnerability was found during internal security testing.

Cisco Security Vulnerability Policy

  o 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

  o Subscribe

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-multiplatform-sip

Revision History

  o +---------+---------------------------+---------+--------+---------------+
    | Version |        Description        | Section | Status |     Date      |
    +---------+---------------------------+---------+--------+---------------+
    | 1.0     | Initial public release.   | --      | Final  | 2018-June-06  |
    +---------+---------------------------+---------+--------+---------------+

Legal Disclaimer

  o 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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