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[Linux] How to upgrade sudo package

Last Updated on 2021-02-09 by Clay

Linux is an operating system that can do all the functions you imagine

Introduction

Today I saw the news and found the sudo tool commonly used in unix-liked operating systems has a heap overflow BUG (number CVE-2021-3156).

At present, it has been confirmed that full root permissions can be obtained in the following version:

  • Ubuntu 20.04（sudo 1.8.31）
  • Debian 10（sudo 1.8.27）
  • Fedora 33（sudo 1.9.2）\

According the news, as well as several discussion forums I have roughly read, almost all of them are suggesting that everyone quickly upgrade the package version. This bug was be found in 2021/01 and was notified to the sudo development group.

After a week, the new version of the fix was already online.

And then, I record how to upgrade our sudo package version.

How to upgrade sudo package

First, we can use the following command to check sudo version:

sudo -V

If your version is under than 1.9.5, upgrade as soon as possible. If you are a server manager, you probably don't want everyone to be able to get root permission.


Step 1: Download sudo installation file

前往 https://www.sudo.ws/dist/ 下載 sudo.tar.gz。

or using the following command:

wget https://www.sudo.ws/dist/sudo.tar.gz


Step 2: Decompression

tar -zxvf sudo.tar.gz
cd sudo-1.9.5p2/

Maybe the version is different from mine.


Step 3: Switch to root and start to "make"

sudo su
./configure --prefix=/usr --libexecdir=/usr/lib --with-secure-path --with-all-insults --with-env-editor --docdir=/usr/share/doc/sudo-1.9.5p2 --with-passprompt="[sudo] password for %p: "
make
make install && ln -sfv libsudo_util.so.0.0.0 /usr/lib/sudo/libsudo_util.so.0


Step 4: Confirm the version has been upgraded

sudo -V

Output:

Sudo version 1.9.5p2
Sudoers policy plugin version 1.9.5p2
Sudoers file grammar version 48
Sudoers I/O plugin version 1.9.5p2
Sudoers audit plugin version 1.9.5p2

And then, we done.

References

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