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Cisco Security Advisory: ATA-186 Password Disclosure Vulnerability 

Revision 1.0: INTERIM 

For Public Release 2002 May 23 16:00 GMT 

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Contents 
======== 

    Summary 
    Affected Products 
    Details 
    Impact 
    Software Versions and Fixes 
    Obtaining Fixed Software 
    Workarounds 
    Exploitation and Public Announcements 
    Status of This Notice 
    Distribution 
    Revision History 
    Cisco Security Procedures 

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Summary 
======= 

The Cisco ATA 186 Analog Telephone Adaptor is a handset-to-Ethernet adaptor 
that interfaces regular analog telephones with IP-based telephony networks. The 
adaptor turns traditional telephones into IP telephones. 

The ATA-186 is provided with a web-based configuration interface whose 
authentication is trivially circumvented. Using a crafted HTTP POST request the 
configuration of the device will be returned to the browser revealing 
configuration information such as passwords. 

This notice will be posted at 
http://www.cisco.com/warp/public/707/ata186-password-disclosure.shtml. 

Affected Products 
================= 

The affected product is the Cisco ATA-186 analog telephone adapter. All 
releases before build 020514a are affected. 

No other Cisco product is currently known to be affected by this vulnerability. 

Details 
======= 

CSCdx54579 
    A simple crafted HTTP POST request may cause the ATA-186 to display 
    its configuration screen. Since the device does not hash its password, 
    the actual password can be gleaned from this screen. The device can 
    also be reconfigured in this way by constructing an HTTP POST 
    with the appropriate parameters. 

Impact 
====== 

By exploiting this vulnerability an attacker can compromise the integrity of 
the ATA-186. 

Software Versions and Fixes 
=========================== 

+---------------------------------------------------------------------------+ 
| Version Affected | Fixed Regular Release (available now) | 
| | Fix carries forward into all later versions | 
|------------------------+--------------------------------------------------| 
| Prior to build 020514a | ata186-v2-14-020514a-2.zip (H.323/SIP image) | 
| | ata186-v2-14-ms-020514a-2.zip (SCCP/MGCP image) | 
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Obtaining Fixed Software 
======================== 

Cisco is offering free software upgrades to address this vulnerability for all 
affected customers. Customers may only install and expect support for the 
feature sets they have purchased. 

Customers with service contracts should contact their regular update channels 
to obtain any software release containing the feature sets they have purchased. 
For most customers with service contracts, this means that upgrades should be 
obtained through the Software Center on Cisco's Worldwide Web site at 
http://www.cisco.com/. 

Customers whose Cisco products are provided or maintained through a prior or 
existing agreement with third-party support organizations such as Cisco 
Partners, authorized resellers, or service providers should contact that 
support organization for assistance with obtaining the free software upgrade(s). 

Customers who purchased directly from Cisco but who do not hold a Cisco service 
contract, and customers who purchase through third party vendors but are 
unsuccessful at obtaining fixed software through their point of sale, should 
obtain fixed software by contacting the Cisco Technical Assistance Center (TAC) 
using the contact information listed below. In these cases, customers are 
entitled to obtain an upgrade to a later version of the same release or as 
indicated by the applicable row in the Software Versions and Fixes table (noted 
above). 

Cisco TAC contacts are as follows: 

  * +1 800 553 2447 (toll free from within North America) 
  * +1 408 526 7209 (toll call from anywhere in the world) 
  * e-mail: tac@cisco.com 

See http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for additional 
TAC contact information, including special localized telephone numbers and 
instructions and e-mail addresses for use in various languages. 

Please have your product serial number available and give the URL of this 
notice as evidence of your entitlement to a free upgrade. 

Please do not contact either "psirt@cisco.com" or "security-alert@cisco.com" 
for software upgrades. 

Workarounds 
=========== 

There is no known workaround. A software upgrade is necessary. 

Exploitation and Public Announcements 
===================================== 

This vulnerability was announced on the BUGTRAQ mailing list on 2002-05-09 
(http://online.securityfocus.com/archive/1/271973) with sufficient information 
that anyone could exercise the flaw. 

The Cisco PSIRT has received no reports of malicious exploitation of this 
vulnerability. 

Status of This Notice: INTERIM 
============================== 

This is an interim notice. Although Cisco cannot guarantee the accuracy of all 
statements in this notice, all of the facts have been checked to the best of 
our ability. Cisco does not anticipate issuing updated versions of this notice 
unless there is some material change in the facts. Should there be a 
significant change in the facts, Cisco may update this notice. 

Distribution 
============ 

This notice will be posted on Cisco's Worldwide Web site at 
http://www.cisco.com/warp/public/707/ata186-password-disclosure.shtml. In 
addition to Worldwide Web posting, a text version of this notice is 
clear-signed with the Cisco PSIRT PGP key and is posted to the following 
e-mail and Usenet news recipients: 

  * cust-security-announce@cisco.com 
  * bugtraq@securityfocus.com 
  * first-teams@first.org (includes CERT/CC) 
  * cisco@spot.colorado.edu 
  * cisco-nsp@puck.nether.net 
  * comp.dcom.sys.cisco 
  * firewalls@lists.gnac.com 
  * Various internal Cisco mailing lists 

Future updates of this notice, if any, will be placed on Cisco's Worldwide Web 
server, but may or may not be actively announced on mailing lists or 
newsgroups. Users concerned about this problem are encouraged to check the URL 
given above for any updates. 

Revision History 
================ 

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|Revision |2002-May-23|Initial Public Release | 
|1.0 |16:00 GMT | | 
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Cisco Security Procedures 
========================= 

Complete information on reporting security vulnerabilities in Cisco products, 
obtaining assistance with security incidents, and registering to receive 
security information from Cisco, is available on Cisco's Worldwide Web site at 
http://www.cisco.com/warp/public/707/sec_incident_response.shtml. This includes 
instructions for press inquiries regarding Cisco security notices. All Cisco 
Security Advisories are available at http://www.cisco.com/go/psirt/. 

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This notice is Copyright 2002 by Cisco Systems, Inc. This notice may be 
redistributed freely after the release date given at the top of the text, 
provided that redistributed copies are complete and unmodified, and include all 
date and version information. 

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