HOW TO FIX THE POLKIT PRIVILEGE ESCALATION VULNERABILITY (CVE-2021-4034)

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The Qualys Research Team has disclosed a 12-year-old memory corruption vulnerability in polkit’s pkexec. The research team confirmed that it has successfully tested this vulnerability on Ubuntu, Debian, Fedora, and CentOS with the default configuration.

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1. What Is Polkit?
2. About The Polkit Privilege Escalation Vulnerability (CVE-2021-4034):
3. Linux Distributions Affected By The Polkit Privilege Escalation Vulnerability (CVE-2021-4034):
4. Major Linux Distributions Affected By The Polkit Privilege Escalation Vulnerability Are:
5. How To Test The Polkit Privilege Escalation Vulnerability (CVE-2021-4034)?
6. How To Discover Assets Vulnerable To Polkit Privilege Escalation Vulnerability?
7. How To Fix The Polkit Privilege Escalation Vulnerability (CVE-2021-4034)?
8. Use These Command If You Want To Update The System:

Table of Contents :

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About The Polkit Privilege Escalation Vulnerability (CVE-2021-4034):

What Is Polkit?

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Use This Command To Update The Polkit Package On Ubuntu:

$ sudo apt install <package name>

$ sudo yum install <package name>

$ sudo apt update && sudo apt upgrade

$ sudo yum update && sudo yum upgrade

$ chmod 0755 /usr/bin/pkexec

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