Linux Bash security bug fix

1. The affected systems include

Centos

Debian

Redhat

Ubuntu

2. Check if the system is being repaired

[[Email protected] ~]# env x= ' () {:;}; echo vulnerable ' bash-c "echo this is a test"
Vulnerable
This is a test
[Email protected] ~]#

如果输出以上结果表示需要修复bash漏洞

3.修复漏洞

[[email protected] ~]# yum update bash -y

4.重新检查漏洞是否修复

[[email protected] ~]# 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
[[email protected] ~]#

This article from "Together Through the Days" blog, declined reprint!

Linux Bash security bug fix