Cisco Wireless LAN Controller Network Processing Unit traffic denial of service
| cisco-wlc-npu-traffic-dos (33609) |  Medium Risk |
Description:
Cisco Wireless LAN Controller (WLC) could allow a remote attacker on a local wireless network segment to cause a denial of service. By sending specially-crafted SNAP packets, 802.11 traffic, or packets containing values with unexpected lengths in certain headers, a remote attacker could cause the controller NPUs to lock.
NOTE: Devices with WLC functionality provided by software are not affected by this vulnerability.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 4.1 |
| Exploitability: | Functional |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to cisco-sa-20070412-wlc for upgrade information. See References.
References:
- cisco-sa-20070412-wlc: Cisco Security Advisory: Multiple Vulnerabilities in the Cisco Wireless LAN Controller and Cisco Lightweight Access Points.
- BID-23461: Cisco Wireless Lan Controller Multiple Remote Vulnerabilities
- CVE-2007-2038: The Network Processing Unit (NPU) in the Cisco Wireless LAN Controller (WLC) before 3.2.193.5, 4.0.x before 4.0.206.0, and 4.1.x allows remote attackers on a local wireless network to cause a denial of service (loss of packet forwarding) via (1) crafted SNAP packets, (2) malformed 802.11 traffic, or (3) packets with certain header length values, aka Bug ID CSCsg36361.
- CVE-2007-2039: The Network Processing Unit (NPU) in the Cisco Wireless LAN Controller (WLC) before 3.2.171.5, 4.0.x before 4.0.206.0, and 4.1.x allows remote attackers on a local wireless network to cause a denial of service (loss of packet forwarding) via (1) crafted SNAP packets, (2) malformed 802.11 traffic, or (3) packets with certain header length values, aka Bug IDs CSCsg15901 and CSCsh10841.
- OSVDB ID: 34136: Cisco Wireless LAN Controller (WLC) Network Processing Unit (NPU) Crafted SNAP Packet DoS
- OSVDB ID: 34137: Cisco Wireless LAN Controller (WLC) Network Processing Unit (NPU) Malformed 802.11 Traffic DoS
- OSVDB ID: 34139: Cisco Wireless LAN Controller (WLC) Network Processing Unit (NPU) Malformed Header Length DoS
- SECTRACK ID: 1017908: Cisco Wireless LAN Controller Lets Remote Users Modify the Configuration and Deny Service
- VUPEN/ADV-2007-1368: Cisco Wireless LAN Controller Security Bypass and Denial of Service Vulnerabilities
Platforms Affected:
- Cisco Wireless LAN Controller 3.2
- Cisco Wireless LAN Controller 4.0
- Cisco Wireless LAN Controller 4.1
Reported:
Apr 12, 2007
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.