Cisco Wireless LAN Controller (WLC) software contains vulnerabilities that could allow an authenticated, remote attacker to gain elevated privileges.
The vulnerabilities are due to improper security controls.† An authenticated, remote attacker could exploit the vulnerabilities to gain elevated privileges on the device, possibly resulting in complete compromise.
Cisco has confirmed the vulnerabilities in a security advisory and released updated software.
Indicators of Compromise
Devices running the following versions of Cisco Wireless LAN Controller are vulnerable:
All 4.0 versions
All 4.1 versions
All 4.1M versions
Versions prior to 220.127.116.11
Versions prior to 18.104.22.168M
All 5.0 versions
All 5.1 versions
Versions prior to 22.214.171.124
Versions prior to 126.96.36.199
The vulnerabilities are due to improper security controls on Cisco WLC management interfaces.† An authenticated, remote attacker with read-only access could exploit the vulnerabilities to make modifications to the device configuration.† The modifications may allow the attacker to gain elevated privileges on the device, possibly resulting in complete compromise.
To exploit the vulnerabilities, an attacker must be able to authenticate to a targeted device.† The attacker may also require access to trusted networks to establish a connection with a device.† The access requirements greatly reduce the potential for exploitation.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Administrators are advised to apply the available software updates.
Administrators are advised to restrict access to affected systems.
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 critical 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: cisco-amb-20100908-wlc†
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 firstname.lastname@example.org.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.