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Category:   Device (Router/Bridge/Hub)  >   Cisco Catalyst Switch Vendors:   Cisco
Cisco CatOS VLAN Trunking Protocol Bug Lets Remote Users on the Local Network Deny Service
SecurityTracker Alert ID:  1021143
SecurityTracker URL:  http://securitytracker.com/id/1021143
CVE Reference:   CVE-2008-4963   (Links to External Site)
Updated:  Nov 6 2008
Original Entry Date:  Nov 5 2008
Impact:   Denial of service via network
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco CatOS. A remote user on the local network can cause denial of service conditions.

A remote user on the local network segment can send a specially crafted VLAN Trunking Protocol (VTP) packet to a target switch interface configured to operate as a trunk port to cause the target device to crash and reload or hang.

Systems configured with the VTP operating mode as either "server" or "client" are affected.

Systems configured with the VTP operating mode as "transparent" or "off" or configured with VTP version 3 are not affected.

Cisco has assigned Cisco Bug ID CSCsv11741 to this vulnerability.

'showrun.lee' reported this vulnerability.

Impact:   A remote user on the local network segment can cause the target device to crash or reload.
Solution:   No solution was available at the time of this entry.

The vendor is working on a fix.

The vendor's advisory is available at:

http://www.cisco.com/warp/public/707/cisco-sr-20081105-vtp.shtml

Vendor URL:  www.cisco.com/warp/public/707/cisco-sr-20081105-vtp.shtml (Links to External Site)
Cause:   Input validation error

Message History:   None.


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