Shulou(Shulou.com)06/01 Report--

How to fix bash vulnerabilities in CentOS systems? I believe that many inexperienced people are at a loss about this, so this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

System: centos5.x

1. Check if your server needs to be repaired

Copy the code

The code is as follows:

Env echo this is a test'() {:;}; echo vulnerable' bash-c "echo this is a test"

If the output is vulnerable, you will upgrade bash.

two。 Upgrade bash

Copy the code

The code is as follows:

Yum-y update bash

If it is a centos6 server, please execute / sbin/ldconfig after yum, and then restart the server.

3. Verification

Copy the code

The code is as follows:

Env echo this is a test'() {:;}; echo vulnerable' bash-c "echo this is a test"

If you report the following lines, there are no loopholes in your bash:

Copy the code

The code is as follows:

Bash: warning: x: ignoring function definition attempt

Bash: error importing function definition for `x'

This is a test

After reading the above, do you know how to fix bash vulnerabilities in CentOS systems? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.