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Vulnerability Alert

Unauthorized Access Vulnerability in Cisco Unified SIP Phone 3905

 
Threat Type:CWE-264: Permissions, Privileges, and Access Control
IntelliShield ID:32841
Version:1
First Published:2014 February 19 16:32 GMT
Last Published:2014 February 19 16:32 GMT
Port: Not available
CVE:CVE-2014-0721
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:10.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:8.3
 
Version Summary:Cisco Unified SIP Phone 3905 contains a vulnerability that could allow an unauthenticated, remote attacker to gain root-level access to an affected device. Updates are available.
 
 
Description
A vulnerability in the Cisco Unified SIP Phone 3905 could allow an unauthenticated, remote attacker to gain root-level access to an affected device.

Cisco has confirmed the vulnerability in a security advisory and has released software updates.
 
Warning Indicators
Cisco Unified SIP Phone 3905 Firmware versions prior to 9.4(1) are affected.
 
IntelliShield Analysis
The undocumented test interface is listening on TCP port 7870 on affected devices. Administrators may consider preventing access to TCP port 7870 on affected devices.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
 
Vendor Announcements
Cisco has released a security advisory for bug ID CSCuh75574 at the following link: cisco-sa-20140219-phone
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to gain root-level access and have complete control of an affected device.
 
Technical Information
This vulnerability is due to the presence of an undocumented test interface on Cisco Unified 3905 Phones.

An unauthenticated, remote attacker could exploit this vulnerability by connecting to the undocumented test interface on a targeted device. If successful, the attacker could gain root-level access on the targeted device, which could be used to conduct further attacks.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: Mitigation and Identification of the Unauthorized Access Vulnerability in Cisco Unified SIP Phone 3905

Administrators are advised to monitor affected systems.
 
Patches/Software
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoCisco Unified SIP Phone 3900 Series Firmware 8.0 Base, (2) | 8.1 (1b), (2), (2)SR1, (3), (4) | 9.2 (1), (2)

Associated Products:
N/A




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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