Cisco IOS Stack Group Bidding Protocol (SGBP)机制不正确处理SGBP协议，远程攻击者可以利用漏洞对设备进行拒绝服务攻击。
漏洞信息
Cisco IOS是一款流行的网络操作系统。
Cisco IOS Stack Group Bidding Protocol (SGBP)机制不正确处理SGBP协议，远程攻击者可以利用漏洞对设备进行拒绝服务攻击。
SGBP协议是多机架多链路点到点协议(MMP)实现，Cisco IOS的SGBP实现在处理畸形UDP包时存在问题，发送恶意UDP包当9900端口可导致设备挂起并停止响应。造成拒绝服务攻击。
用户可根据如下的命令查看是否起用SGBP协议：
* 系统支持但没有起用SGBP将返回如下信息：
Router#show sgbp
Router#
* 系统不支持SGBP将返回如下错误消息：
Router#show sgbp
Router#show sgbp
% Invalid input detected at '^' marker.
厂商解决方案
可参考供给商的如下链接获得补丁信息：
http://www.cisco.com/warp/public/707/cisco-sa-20060118-sgbp.sHtml
漏洞提供者
Cisco
漏洞消息链接
http://marc.theaimsgroup.com/?l=bugtraq&m=113761985600401&w=2
漏洞消息标题
Cisco Security Advisory: IOS Stack Group Bidding Protocol Crafted Packet DoS
BUGTRAQ ID: 16303
CNCAN ID:CNCAN-2006011903
漏洞消息时间:2006-01-18
漏洞起因
异常条件处理失败错误
影响系统
Cisco IOS 12.4 XB
Cisco IOS 12.4 XA
Cisco IOS 12.4 T
Cisco IOS 12.4 MR
Cisco IOS 12.4
Cisco IOS 12.3 YX
Cisco IOS 12.3 YU
Cisco IOS 12.3 YT
Cisco IOS 12.3 YQ
Cisco IOS 12.3 YM
Cisco IOS 12.3 YK
Cisco IOS 12.3 YJ
Cisco IOS 12.3 YG
Cisco IOS 12.3 YF
Cisco IOS 12.3 XW
Cisco IOS 12.3 XU
Cisco IOS 12.3 XQ
Cisco IOS 12.3 XM
Cisco IOS 12.3 XJ
Cisco IOS 12.3 XI
Cisco IOS 12.3 XH
Cisco IOS 12.3 XF
Cisco IOS 12.3 XD
Cisco IOS 12.3 XB
Cisco IOS 12.3 T
Cisco IOS 12.3 BW
Cisco IOS 12.3 BC
Cisco IOS 12.3 B
Cisco IOS 12.3
Cisco IOS 12.2 ZN
Cisco IOS 12.2 ZJ
Cisco IOS 12.2 ZE
Cisco IOS 12.2 ZD
Cisco IOS 12.2 ZB
Cisco IOS 12.2 ZA
Cisco IOS 12.2 YZ
Cisco IOS 12.2 YY
Cisco IOS 12.2 YX
Cisco IOS 12.2 YW
Cisco IOS 12.2 YT
Cisco IOS 12.2 YN
Cisco IOS 12.2 YE
Cisco IOS 12.2 YD
Cisco IOS 12.2 XV
Cisco IOS 12.2 XT
Cisco IOS 12.2 XS
Cisco IOS 12.2 XL
Cisco IOS 12.2 XK
Cisco IOS 12.2 XG
Cisco IOS 12.2 XF
Cisco IOS 12.2 XC
Cisco IOS 12.2 XB
Cisco IOS 12.2 XA
Cisco IOS 12.2 T
Cisco IOS 12.2 SZ
Cisco IOS 12.2 SY
Cisco IOS 12.2 SU
Cisco IOS 12.2 S
Cisco IOS 12.2 MC
Cisco IOS 12.2 DX
Cisco IOS 12.2 DD
Cisco IOS 12.2 CX
Cisco IOS 12.2 BY
Cisco IOS 12.2 BW
Cisco IOS 12.2 BC
Cisco IOS 12.2 B
Cisco IOS 12.2
Cisco IOS 12.1 YD
Cisco IOS 12.1 YB
Cisco IOS 12.1 YA
Cisco IOS 12.1 XZ
Cisco IOS 12.1 XY
Cisco IOS 12.1 XX
Cisco IOS 12.1 XW
Cisco IOS 12.1 XU
Cisco IOS 12.1 XS
Cisco IOS 12.1 XQ
Cisco IOS 12.1 XM
Cisco IOS 12.1 XL
Cisco IOS 12.1 XI
Cisco IOS 12.1 XH
Cisco IOS 12.1 XD
Cisco IOS 12.1 XA
Cisco IOS 12.1 T
Cisco IOS 12.1 GB
Cisco IOS 12.1 GA
Cisco IOS 12.1 EZ
Cisco IOS 12.1 EX
Cisco IOS 12.1 EC
Cisco IOS 12.1 E
Cisco IOS 12.1 AA
Cisco IOS 12.1
Cisco IOS 12.0 XR
Cisco IOS 12.0 XN
Cisco IOS 12.0 XL
Cisco IOS 12.0 XK
Cisco IOS 12.0 XJ
Cisco IOS 12.0 XI
Cisco IOS 12.0 XH
Cisco IOS 12.0 XG
Cisco IOS 12.0 XE
Cisco IOS 12.0 XD
Cisco IOS 12.0 XC
Cisco IOS 12.0 XA
Cisco IOS 12.0 T
Cisco IOS 12.0 SC
Cisco IOS 12.0 S
Cisco IOS 12.0
危害
远程攻击者可以利用漏洞对设备进行拒绝服务攻击。
攻击所需条件
攻击者必须访问Cisco IOS。
