ESB-2018.1513 - [Appliance] Cisco IP phones: Denial of service - Remote/unauthenticated 2018-05-17

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1513
                      DoS patched in Cisco IP Phones
                                17 May 2018

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

Product:           Cisco IP Phone 7800 Series
                   Cisco IP Phone 8800 Series
Publisher:         Cisco Systems
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0325  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-ip-phone-dos

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Cisco IP Phone 7800 Series and 8800 Series Denial of Service Vulnerability

Severity: Medium
Advisory ID: cisco-sa-20180516-ip-phone-dos
First Published: 2018 May 16 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvf40066
 
CVSS Score:
Base 5.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:X/RL:X/RC:X
CVE-2018-0325
 
Summary

  * 
    A vulnerability in the Session Initiation Protocol (SIP) call-handling
    functionality of Cisco IP Phone 7800 Series phones and Cisco IP Phone 8800
    Series phones could allow an unauthenticated, remote attacker to cause a
    denial of service (DoS) condition on an affected phone.

    The vulnerability is due to incomplete input validation of SIP Session
    Description Protocol (SDP) parameters by the SDP parser of an affected
    phone. An attacker could exploit this vulnerability by sending a malformed
    SIP packet to an affected phone. A successful exploit could allow the
    attacker to cause all active phone calls on the affected phone to be
    dropped while the SIP process on the phone unexpectedly restarts, resulting
    in a DoS condition.

    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-20180516-ip-phone-dos

Affected Products

  * Vulnerable Products

    This vulnerability affects Cisco IP Phone 7800 Series phones and Cisco IP
    Phone 8800 Series phones. For information about affected phone loads,
    consult the Cisco bug ID(s) at the top of this advisory.

    Products Confirmed Not Vulnerable

    Only products listed in the Vulnerable Products section of this advisory
    are 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

  * Cisco would like to thank Mozilla for reporting this vulnerability.

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-20180516-ip-phone-dos

Revision History

  * 
    +-----------------------------------------------------------------------------+
    | Version  |         Description         | Section  | Status  |     Date      |
    |----------+-----------------------------+----------+---------+---------------|
    | 1.0      | Initial public release.     | ?        | Final   | 2018-May-16   |
    +-----------------------------------------------------------------------------+

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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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