Linux Bash严重漏洞

在阿里云购买的Centos 6.5 64位，所有安装GNU bash 版本小于或者等于4.3的Linux操作系统，通过bash -version 查看如下图：

升级方法很简单，用yum -y update bash

reboot

GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

更新之后无解，版本相同，不知道， 是不是镜像那里出问题了？

漏洞检测命令：env x='() { :;}; echo vulnerable' bash -c "echo this is a test"

修复前
输出:
vulnerable
this is a test

使用修补方案修复后
bash: warning: x: ignoring function definition attempt
bash: error importing function definition for `x'
this is a test
特别提示：该修复不会有任何影响，如果您的脚本使用以上方式定义环境变量，修复后您的脚本执行会报错。

显示结果：

[root@iZ25cv9rpyqZ ~]# env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
bash: warning: x: ignoring function definition attempt
bash: error importing function definition for `x'
this is a test

没有问题啊。

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