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Vulnerability Alert

Multiple Cisco Products Web Framework Authenticated Command Injection Vulnerability

 
Threat Type:CWE-78: OS Command Injections
IntelliShield ID:29726
Version:1
First Published:2013 June 26 16:21 GMT
Last Published:2013 June 26 16:21 GMT
Port: Not available
CVE:CVE-2013-3384
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:7.4
 
Version Summary:Multiple Cisco products contain a vulnerability that could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system with elevated privileges. Updates are available.
 
 
Description
A vulnerability in the web framework code could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system with elevated privileges.  

The vulnerability is due to a failure to properly sanitize user supplied input that is subsequently utilized to perform an action that leverages the underlying command-line interface of the device. An authenticated but unprivileged attacker could exploit this vulnerability by sending a crafted URL to the affected system, or by convincing a valid user to click on a malicious URL. A successful exploit could allow an attacker with sufficient knowledge to take complete control of the affected device.


Cisco has confirmed the vulnerability in multiple security advisories and has released software updates.
 
Warning Indicators
The following Cisco products are vulnerable:
  • Cisco Web Security Appliance (WSA) prior to 7.7.0-550
  • Cisco Email Security Appliance (ESA) prior to 7.6.3-019
  • Cisco Content Security Management Appliance (SMA) prior to 7.9.1-102
 
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 link. In addition, authentication is required to exploit the vulnerability. This access requirement could limit the likelihood of a successful exploit.

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 security advisories for bug IDs CSCzv44633, CSCzv85726, and CSCzv24579 at the following links: cisco-sa-20130626-esa, cisco-sa-20130626-wsa, and cisco-sa-20130626-sma
 
Impact
An authenticated, remote attacker could exploit the vulnerability to execute arbitrary commands on a targeted system with elevated privileges. A successful exploit could allow the attacker to cause a complete system compromise.
 
Technical Information
The vulnerability is due to a failure to properly sanitize user-supplied input processed by the affected software. The vulnerability could be triggered by IPv4 or IPv6 traffic directed to the management IP addresses of the affected system via TCP port 80 or TCP port 443.

An authenticated but unprivileged attacker could exploit this vulnerability by sending a crafted URL to the affected system or by convincing a valid user to click a malicious URL. A successful exploit could allow an attacker with sufficient knowledge to take complete control of the affected device.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators may consider disabling management access to the GUI or restricting IP addresses that can access the management interface as mitigation strategies. Details about these actions are in the security advisories listed in the "Vendor Announcements" section of this alert.

It is critical to prevent unauthorized direct communication to network devices. Restrict network traffic destined for the network infrastructure to protect against reconnaissance and denial of service attacks. For configuration details, see Protecting Your Core: Infrastructure Protection Access Control Lists.

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: Identifying and Mitigating Exploitation of the Multiple Vulnerabilities in Cisco Content Security Management, Web Security, and Email Security Appliances

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 e-mail at tac@cisco.com
 
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
CiscoCisco Email Security Appliance (ESA) 7.1 .0, .1, .2, .3, .4, .5 | 7.3 .0, .1, .2 | 7.5 .0, .1, .2 | 7.6 .0, .1, .2
CiscoCisco Content Security Management Appliance (SMA) 7.2 .0, .1, .2 | 7.7 .0, .1 | 7.9 .0, .1

Associated Products:
N/A




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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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