发布日期: 2001-11-15
更新日期: 2001-11-19
受影响的系统:
Cisco IOS 11.1
Cisco IOS 11.2P
Cisco IOS 11.2
Cisco IOS 11.3T
Cisco IOS 11.3
Cisco IOS 12.0XV
Cisco IOS 12.0XU
Cisco IOS 12.0XS
Cisco IOS 12.0XR
Cisco IOS 12.0XQ
Cisco IOS 12.0XP
Cisco IOS 12.0XN
Cisco IOS 12.0XM
Cisco IOS 12.0XL
Cisco IOS 12.0XK
Cisco IOS 12.0XJ
Cisco IOS 12.0XI
Cisco IOS 12.0XH
Cisco IOS 12.0XG
Cisco IOS 12.0XF
Cisco IOS 12.0XE
Cisco IOS 12.0XD
Cisco IOS 12.0XC
Cisco IOS 12.0XB
Cisco IOS 12.0XA
Cisco IOS 12.0WT
Cisco IOS 12.0WC
Cisco IOS 12.0W5
Cisco IOS 12.0ST
Cisco IOS 12.0SL
Cisco IOS 12.0SC
Cisco IOS 12.0S
Cisco IOS 12.0DC
Cisco IOS 12.0DB
Cisco IOS 12.0DA
Cisco IOS 12.0
Cisco IOS 12.1YH
Cisco IOS 12.1YF
Cisco IOS 12.1YE
Cisco IOS 12.1YD
Cisco IOS 12.1YC
Cisco IOS 12.1YB
Cisco IOS 12.1YA
Cisco IOS 12.1XX
Cisco IOS 12.1XW
Cisco IOS 12.1XV
Cisco IOS 12.1XU
Cisco IOS 12.1XT
Cisco IOS 12.1XS
Cisco IOS 12.1XR
Cisco IOS 12.1XQ
Cisco IOS 12.1XP
Cisco IOS 12.1XM
Cisco IOS 12.1XL
Cisco IOS 12.1XK
Cisco IOS 12.1XJ
Cisco IOS 12.1XI
Cisco IOS 12.1XH
Cisco IOS 12.1XG
Cisco IOS 12.1XF
Cisco IOS 12.1XE
Cisco IOS 12.1XD
Cisco IOS 12.1XC
Cisco IOS 12.1XB
Cisco IOS 12.1XA
Cisco IOS 12.1T
Cisco IOS 12.1EZ
Cisco IOS 12.1EY
Cisco IOS 12.1EX
Cisco IOS 12.1EC
Cisco IOS 12.1EA
Cisco IOS 12.1E
Cisco IOS 12.1DC
Cisco IOS 12.1DB
Cisco IOS 12.1DA
Cisco IOS 12.1AA
Cisco IOS 12.1
Cisco IOS 12.2XQ
Cisco IOS 12.2XK
Cisco IOS 12.2XJ
Cisco IOS 12.2XI
Cisco IOS 12.2XH
Cisco IOS 12.2XG
Cisco IOS 12.2XE
Cisco IOS 12.2XD
Cisco IOS 12.2XC
Cisco IOS 12.2XB
Cisco IOS 12.2XA
Cisco IOS 12.2T
Cisco IOS 12.2DD
Cisco IOS 12.2
描述:
------------------------------------------------------------------------
--------
BUGTRAQ ID: 3547
一些特定版本的Cisco IOS软件存在漏洞，通过向运行着那些IOS软件的Cisco路由
器或交换机的
有广播能力的接口（如ethernet, cable, tokenring, fddi）发送特别的ARP包，
可以使那些
设备在那些接口上停止接收和发送ARP包。这个漏洞的问题在于当一个路由器收到
一个指向它自
身某个接口IP地址的ARP包，而IP对应的Mac地址为另一个与自身缓存里不同的Mac
地址时，路由
器中的相关ARP表中的表项将被收到的内容重写。
这种攻击只能在攻击者与被攻击的设备处于同一个网段内才能实现。这个漏洞的
Cisco漏洞ID为
CSCdu81936。
<*来源：Cisco Systems Product Security Incident Response Team （
psirt@cisco.com）
链接：http://www.cisco.
com/warp/public/707/IOS-arp-overwrite-vuln-pub.shtml
*>
------------------------------------------------------------------------
--------
建议:
临时解决方法：
如果您不能立刻安装补丁或者升级，NSFOCUS建议您采取以下措施以降 威胁：
* 绑定接口的IP地址和Mac地址
在运行IOS系统软件的设备上使用下面的命令：
arp
在运行CatOS系统软件的设备上使用下面的命令：
set arp [dynamic|permanent|static]
厂商补丁：
Cisco已经提供了补丁或者升级程序，请您参考Cisco的相关安全公告进行相应的升
级：
http://www.cisco.com/warp/public/707/IOS-arp-overwrite-vuln-pub.shtml