Description of problem:
I've read today on the french journal "Le Monde informatique" that all major linux distros (including mageia ?) were menaced by the vulnerability CVE-2021-4034 aka PwnKit, and they advised to run the command:
chmod 0755 /usr/bin/pkexec that I've immediately done:
before running this command:
[alain4@magaux ~]$ ls -l /usr/bin |grep pkexec
-rwxr-xr-x   1 root   root          281 sept. 19  2017 lightdm-gtk-greeter-settings-pkexec*
-rwsr-xr-x   1 root   root        28392 janv. 26 01:07 pkexec*

and after:
[alain4@magaux ~]$ ls -l /usr/bin |grep pkexec
-rwxr-xr-x   1 root   root          281 sept. 19  2017 lightdm-gtk-greeter-settings-pkexec*
-rwxr-xr-x   1 root   root        28392 janv. 26 01:07 pkexec*

was I right to do that?
thant you for considering this post which seems to me very important


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