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Date: Wed, 26 Jan 2022 12:18:07 +0100
From: Roman Medina-Heigl Hernandez <>
Subject: Re: pwnkit: Local Privilege Escalation in polkit's
 pkexec (CVE-2021-4034)

Exploit by blasty attached (also at:

PS: Untested because my Debian machine doesn't contain pkexec, even 
though Qualy's advisory says it is by default on Debian.

PS2: Since vuln is trivially exploitable other exploits will arise for 
sure. Well, indeed there are already other exploits. (eg:



El 25/01/2022 a las 19:04, Sam James escribió:
>> On 25 Jan 2022, at 17:57, Qualys Security Advisory <> wrote:
>> Qualys Security Advisory
>> pwnkit: Local Privilege Escalation in polkit's pkexec (CVE-2021-4034)
>> [snip]
> Hi,
> For the benefit of downstreams: patch is available in gitlab [0]
> but no release yet.
> [0]
> Best,
> sam


View attachment "blasty-vs-pkexec.c" of type "text/plain" (2159 bytes)

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