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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS Stack Group Bidding Protocol Lets Remote Users Deny Service
SecurityTracker Alert ID:  1015501
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jan 18 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 12.1 - 12.4
Description:   A vulnerability was reported in Cisco IOS in the Stack Group Bidding Protocol (SGBP) feature. A remote user can cause denial of service conditions.

A remote user can send a specially crafted UDP packet to port 9900 of the target device to cause the device to freeze and stop processing traffic. The system's watchdog timer will restart the device after the timeout period.

Only systems that have the SGBP protocol enabled are affected.

Cisco has assigned Cisco bug ID CSCsb11124 to this vulnerability.

Cisco discovered this vulnerability during internal testing.

Impact:   A remote user can cause the target device to become unresponsive and trigger a hardware reset.
Solution:   The vendor has issued a fix. A fix matrix is available in the vendor's advisory at:

Vendor URL: (Links to External Site)
Cause:   Exception handling error

Message History:   None.

 Source Message Contents

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