在广泛使用的Linux软件Bash中新发现了一个安全漏洞。该漏洞对电脑用户构成的威胁可能比今年4月发现的“心脏流血”(Heartbleed)漏洞更大。Hacker可以利用Bash中的漏洞完全控制目标系统,执行任意代码。
【BASH漏洞检测方法】
漏洞检测命令:
$ env x='() { :;}; echo vulnerable' bash -c "echo this is a test" vulnerable this is a test
如果显示如上,那么,很遗憾,必须立即打上安全补丁修复。
【建议修补方案 】
特别提示:该修复不会有任何影响。
根据Linux版本选择您需要修复的命令:.
centos: yum -y update bash ubuntu: 14.04 64bit wget http://mirrors.aliyun.com/fix_stuff/bash_4.3-7ubuntu1.1_amd64.deb && dpkg -i bash_4.3-7ubuntu1.1_amd64.deb 14.04 32bit wget http://mirrors.aliyun.com/fix_stuff/bash_4.3-7ubuntu1.1_i386.deb && dpkg -i bash_4.3-7ubuntu1.1_i386.deb 12.04 64bit wget http://mirrors.aliyun.com/fix_stuff/bash_4.2-2ubuntu2.2_amd64.deb && dpkg -i bash_4.2-2ubuntu2.2_amd64.deb 12.04 32bit wget http://mirrors.aliyun.com/fix_stuff/bash_4.2-2ubuntu2.2_i386.deb && dpkg -i bash_4.2-2ubuntu2.2_i386.deb 10.× 64bit wget http://mirrors.aliyun.com/fix_stuff/bash_4.1-2ubuntu3.1_amd64.deb && dpkg -i bash_4.1-2ubuntu3.1_amd64.deb 10.× 32bit wget http://mirrors.aliyun.com/fix_stuff/bash_4.1-2ubuntu3.1_i386.deb && dpkg -i bash_4.1-2ubuntu3.1_i386.deb debian: 7.5 64bit && 32bit apt-get -y install --only-upgrade bash 6.0.x 64bit wget http://mirrors.aliyun.com/debian/pool/main/b/bash/bash_4.1-3%2bdeb6u1_amd64.deb && dpkg -i bash_4.1-3+deb6u1_amd64.deb 6.0.x 32bit wget http://mirrors.aliyun.com/debian/pool/main/b/bash/bash_4.1-3%2bdeb6u1_i386.deb && dpkg -i bash_4.1-3+deb6u1_i386.deb opensuse: 13.1 64bit wget http://mirrors.aliyun.com/fix_stuff/bash-4.2-68.4.1.x86_64.rpm && rpm -Uvh bash-4.2-68.4.1.x86_64.rpm 13.1 32bit wget http://mirrors.aliyun.com/fix_stuff/bash-4.2-68.4.1.i586.rpm && rpm -Uvh bash-4.2-68.4.1.i586.rpm aliyun linux: 5.x 64bit wget http://mirrors.aliyun.com/centos/5/updates/x86_64/RPMS/bash-3.2-33.el5.1.x86_64.rpm && rpm -Uvh bash-3.2-33.el5.1.x86_64.rpm 5.x 32bit wget http://mirrors.aliyun.com/centos/5/updates/i386/RPMS/bash-3.2-33.el5.1.i386.rpm && rpm -Uvh bash-3.2-33.el5.1.i386.rpm
【修补完成测试】
升级bash后,执行测试:
$ 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
如果显示如上,表示已经修补了漏洞。