ESB-2017.3049 - [Cisco] Cisco IP Phone: Denial of service - Remote/unauthenticated 2017-11-30

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.3049
                           cisco-sa-20171129-ipp
                             30 November 2017

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        AusCERT Security Bulletin Summary
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Product:           Cisco IP Phone
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12328  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-ipp

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Medium

 Advisory ID:
 
cisco-sa-20171129-ipp
First Published:
2017 November 29 16:00  GMT
 
 Version 1.0:
 
 
Final

 Workarounds:
 
No workarounds available
Cisco Bug IDs:
CSCvc62590
CVE-2017-12328
CWE-20
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

 Summary
 
A vulnerability in Session Initiation Protocol (SIP) call handling in
Cisco IP Phone 8800 Series devices could allow an unauthenticated,
remote attacker to cause a denial of service (DoS) condition because
the SIP process unexpectedly restarts. All active phone calls are
dropped as the SIP process restarts.
The vulnerability is due to incomplete input validation of the SIP
packet header. An attacker could exploit this vulnerability by sending
a malformed SIP packet to a targeted phone. An exploit could allow the
attacker to cause a DoS condition because all phone calls are dropped
when the SIP process unexpectedly restarts.
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-20171129-ipp

 Affected Products
 
 Vulnerable Products
 
This vulnerability affects Cisco IP Phone 8800 Series devices. For
information about affected phone loads, 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.

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.

 URL
 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20171129-ipp

Revision History
Version	Description		Section	Status	Date
1.0	Initial public release.		Final	2017-November-29

 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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