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Vulnerability Alert

Cisco Adaptive Security Appliance Phone Proxy sec_db Race Condition Vulnerability

 
Threat Type:CWE-362: Race Conditions
IntelliShield ID:32955
Version:1
First Published:2014 February 21 15:43 GMT
Last Published:2014 February 21 15:43 GMT
Port: Not available
CVE:CVE-2014-0739
BugTraq ID:65707
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.9
Related Resources:
View related Security Notice
 
 
Version Summary:Cisco Adaptive Security Appliance contains a vulnerability that could allow an unauthenticated, remote attacker to pass traffic from an untrusted phone through a targeted device. Updates are not available.
 
 
Description
A vulnerability in the TFTP request function of the Phone Proxy feature of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to pass traffic from an untrusted phone through the ASA.

The vulnerability is due to a limitation in processing the TFTP request for a configuration file. An attacker could exploit this vulnerability by sending a crafted TFTP request for a phone configuration file. An exploit could allow the attacker to pass traffic from an untrusted phone through the ASA.

Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
At the time this alert was first published, Cisco ASA versions 9.1(.3) and prior were vulnerable. Later releases of Cisco ASA may also be vulnerable.
 
IntelliShield Analysis
Cisco indicates through the CVSS score that proof-of-concept exploit code exists; however, the code is not known to be publicly available.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2014-0739

Customers are advised to consult Cisco bug ID CSCuj66766 for a complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to bypass security restrictions and pass traffic from an untrusted phone through an affected device.
 
Technical Information
The vulnerability is due to a limitation in processing TFTP requests for a configuration file by the TFTP request function of the Phone Proxy feature of an affected device.

An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted TFTP request for a phone configuration file. An exploit could allow the attacker to pass traffic from an untrusted phone through the ASA.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

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

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

Administrators are advised to monitor affected systems.
 
Patches/Software
Software updates are not available.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco Adaptive Security Appliance (ASA) Software 9.1 .1, .1.4, .2, .2.8, .3

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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