Is AWS Linux / Linux 2 vulnerable to CVE-2021-4034?

Question

I noticed that our AWS Linux installations do not have 'pkexec', does it mean that they are not vulnerable? if it is anyway (e.g. pkexec could have been renamed).. appreciate mitigation procedures. thanks

Answer

I have not been able to confirm the use of pkexec in Amazon Linux AMIs.

But here is  a mitigation:
A temporary mitigation for operating systems that have yet to push a patch is to strip pkexec of the read/write rights with the following command:
chmod 0755 /usr/bin/pkexec

Source:
https://www.bleepingcomputer.com/news/security/linux-system-service-bug-gives-root-on-all-major-distros-exploit-released/

Is AWS Linux / Linux 2 vulnerable to CVE-2021-4034?

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