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Cisco Security

Cisco AsyncOS Cross-Site Scripting Vulnerability

 
Threat Type:CWE-79: Cross-Site Scripting (XSS)
IntelliShield ID:34569
Version:1
First Published:2014 June 09 20:38 GMT
Last Published:2014 June 09 20:38 GMT
Port: Not available
CVE:CVE-2014-3289
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.1
 
 
Version Summary:Cisco AsyncOS contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks. Updates are not available.
 
 
Description
A vulnerability in the web management interface of Cisco AsyncOS could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web interface on the affected system.

The vulnerability is due to insufficient input validation of a parameter. An attacker could exploit this vulnerability by convincing the user to access a malicious link.

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, the following Cisco products were vulnerable. Later versions of these products may also be vulnerable.
  • Cisco Email Security Appliance (ESA) version 8.0
  • Cisco Web Security Appliance (WSA) versions 8.0 (.5 Hot Patch 1) and prior
  • Cisco Content Security Management Appliance (SMA) versions 8.3 and prior
 
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.

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 notice at the following link: CVE-2014-3289

Customers are advised to consult Cisco bug IDs CSCun07998, CSCun07844, and CSCun07888 for a complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code in the user's browser session in the context of the affected site. This could allow the attacker to access sensitive browser-based information such as authentication cookies and recently submitted data.
 
Technical Information
The vulnerability is due to insufficient input validation of a parameter, which affects the web management interface of a device running Cisco AsyncOS.

An unauthenticated, remote attacker could exploit this vulnerability by persuading a user to access a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the user's browser session and steal sensitive information, such as authentication cookies or recently submitted data.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.

For additional information about cross-site scripting attacks and the methods used to exploit these vulnerabilities, see the Cisco Applied Mitigation Bulletin Understanding Cross-Site Scripting (XSS) Threat Vectors.

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

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 Web Security Appliance (WSA) 7.1 .0, .1, .2, .3, .4 | 7.5 .0, .1 | 7.7 Base | 8.0 Base, .5, .5 Hot Patch 1
CiscoCisco Email Security Appliance (ESA) 8.0 Base
CiscoCisco Content Security Management Appliance (SMA) 7.2 .0, .1, .2 | 7.7 .0, .1 | 7.8 Base | 7.9 .0, .1 | 8.0 .0 | 8.1 .0 | 8.2 Base | 8.3 Base

Associated Products:
N/A



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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