How to fix bash loophole under CentOS Linux

This article mainly explains "how to fix bash loopholes under CentOS Linux". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to fix bash vulnerabilities under CentOS Linux.

As soon as I turned on the computer today, I found that the bash loophole in the group was even more serious than the painstaking loophole. Well, it seems that there is something to do today.

System: centos5.x

1. Check if your server needs to be repaired

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

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

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:

The code is as follows:

Bash: warning: x: ignoring function definition attempt

Bash: error importing function definition for `x'

This is a test

All right, whether you want to upgrade or not depends on whether your upper one has approved it or not.

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