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CVE-2021-4034 — Local Privilege Escalation in polkit's pkexec (CVE-2021-4034) | Kitploit
Tools/GitHubGitHub/al1ex/cve-2021-4034
Privilege EscalationVulnerability AnalysisExploitationLearning & EducationBinary Exploitation
GitHubal1ex/cve-2021-4034

CVE-2021-4034

Local Privilege Escalation in polkit's pkexec (CVE-2021-4034)

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4424 years agoNot yet reviewed

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Information

root@kitploit:~
Exploit Title: Local Privilege Escalation in polkit's pkexec (CVE-2021-4034)
Date: 01/25/2022
Exploit Author: Qualys Research Team
Tested on: ubuntu 20.04.1 LTS
CVE ID: CVE-2021-27928

How to Exploit

Test Environment：

img

Step 1：build the exp(From https://github.com/berdav/CVE-2021-4034)

root@kitploit:~
make

img

Step 2：run exploit and get a root shell

img

Analysis Detail

https://blog.qualys.com/vulnerabilities-threat-research/2022/01/25/pwnkit-local-privilege-escalation-vulnerability-discovered-in-polkits-pkexec-cve-2021-4034

Reference

https://github.com/berdav/CVE-2021-4034

https://www.qualys.com/2022/01/25/cve-2021-4034/pwnkit.txt

Disclosure Timeline

  • 2021-11-18: Advisory sent to secalert@redhat.
  • 2022-01-11: Advisory and patch sent to distros@openwall.
  • 2022-01-25: Coordinated Release Date (5:00 PM UTC).
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