ID

VAR-200704-0021

CVE

CVE-2007-2037

TITLE

Cisco WLC Service disruption in (DoS) Vulnerabilities

DESCRIPTION

Cisco Wireless LAN Controller (WLC) before 3.2.116.21, and 4.0.x before 4.0.155.0, allows remote attackers on a local network to cause a denial of service (device crash) via malformed Ethernet traffic. An attacker can exploit these issues to completely compromise the affected device, cause a denial-of-service condition, obtain potentially sensitive information, and gain unauthorized access to the affected device. Cisco Wireless LAN Controllers (WLCs) manage Cisco Aironet access points using the Lightweight Access Point Protocol (LWAPP). There are multiple security holes in the implementation of WLC: The default SNMP community string +----------------------------- WLC reads it only The public and private values ​​are used for reading and writing SNMP community strings. This vulnerability is documented in Cisco Bug ID as CSCse02384. Malformed Ethernet communication crash +----------------------------- WLC may crash when responding to malformed Ethernet communication. This vulnerability is documented in Cisco Bug ID as CSCsc90179. Multiple NPU Lock-Up Vulnerabilities +----------------------------- The Network Processing Unit (NPU) is responsible for handling communication in the WLC. One or more NPUs may lock up if certain types of traffic are sent to the affected WLC. These communications include specially crafted SNAP messages, malformed 802. 11 Communication and some headers contain messages with unexpected length values. Each NPU operates independently, servicing two physical ports on the WLC, and locking one NPU does not affect the other, so the number of NPUs available and device configuration determine whether these vulnerabilities can result in partial or complete inability to forward traffic. If you want to clear the NPU lock, you must restart the WLC. If a lockout prevents access to the management interface, a reboot must be performed through the console port or the service port. These vulnerabilities are documented in Cisco Bug IDs as CSCsg36361, CSCsg15901, and CSCsh10841. Service password hardcoded in lightweight AP + -------------------------- Cisco Aironet 1000 Series and 1500 Series Lightweight Access Points include There is a hardcoded service password for debugging. This service account is only accessible through a physical connection to the console port, but the password is the same for all devices in these families. This vulnerability is documented in Cisco Bug ID as CSCsg15192. WLAN ACL becomes invalid after restarting +-------------------------- WLC has a loophole in processing WLAN ACL, resulting in an invalid verification and save the WLAN ACL configuration. If the configuration is later reloaded at boot time, the checksum will be invalidated and the WLAN ACL will not be installed. This vulnerability is documented in Cisco Bug ID as CSCse58195

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

specific network environment

TYPE

resource management error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco Security bulletin

SOURCES

LAST UPDATE DATE

2023-12-18T12:23:38.627000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE