bash-4.2.45-5.el7_0.2 bash-4.1.2-15.el6_5.1 bash-4.1.2-15.el6_5.1.sjis.1 bash-4.1.2-9.el6_2.1 bash-4.1.2-15.el6_4.1 bash-3.2-33.el5.1Linux bash-3.2-33.el5_11.1.sjis.1 bash-3.2-24.el5_6.1 bash-3.2-32.el5_9.2 bash-3.0-27.el4.2
查看命令如下:
env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
如果输出:
vulnerable this is a test
则系统存在风险
修复方式:
yum -y update bash
修复后输出如下:
bash: warning: x: ignoring function definition attempt bash: error importing function definition for `x' this is a test