Cisco Wireless LAN Controller Software contains a vulnerability that could allow an authenticated, remote attacker to execute arbitrary code on an affected device. Updates are available.
Description
Cisco Wireless LAN Controller (WLC) Software contains a vulnerability that could allow an authenticated, remote attacker to execute arbitrary code on an affected device.
The vulnerability is due to improper sanitization of user-supplied input processed by the affected software. An authenticated, remote attacker could exploit this vulnerability by sending a crafted UserAgent string to the targeted system. The processing of the crafted string could allow the attacker to execute arbitrary code on the system, which could result in a complete system compromise.
Cisco has confirmed the vulnerability in a security advisory and released updated software.
Warning Indicators
Cisco WLC Software version 7.3.101.0 is vulnerable while running on the Cisco WLC family of products. A list of the specific products is in the "Vulnerable Products" section of the PSIRT advisory.
IntelliShield Analysis
To exploit this vulnerability, an attacker would need to authenticate to the affected device to send crafted UserAgent strings. The device would likely reside on an internal, secure network. This access requirement may make successful exploitation difficult.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An authenticated, remote attacker could exploit this vulnerability to execute arbitrary code on an affected device. Successful exploitation could result in a complete system compromise of the device.
Technical Information
The vulnerability is due to improper sanitization of user-supplied input processed by the affected software when the HTTP Profiling feature is enabled.
An authenticated, remote attacker could exploit this vulnerability by sending a crafted UserAgent string via wired or wireless segments to a targeted system. The processing of the crafted string could allow an attacker to execute arbitrary code on the system.
Safeguards
Administrators are advised to apply the available software updates.
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 may consider disabling the HTTP Profiling feature in the affected software if this option is not needed.
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.
The security vulnerability applies to the following combinations of products.
Primary Products:
Cisco
Cisco Wireless LAN Controller (WLC)
7.3 .101.0
Associated Products:
N/A
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