On 27.01.2022 00:21, Adam Williamson wrote:
Hi folks!
Hi!
For anyone who hasn't seen it yet - there's quite a kerfuffle today about a major security issue in polkit: https://arstechnica.com/information-technology/2022/01/a-bug-lurking-for-12-years-gives-attackers-root-on-every-major-linux-distro/ turns out that ever since it was invented, `pkexec` has had a bug allowing for local root privilege escalation. Which is...bad. The issue and some of the comments around it prompted me to wonder - why is `pkexec` still a thing? Particularly, why is it still a thing we are shipping by default in just about every Fedora install? My best recollection is that pkexec was kinda a kludge to allow us to get rid of consolehelper: some apps weren't getting rewritten to the Right Way of doing things under policykit, they still just wanted to have the entire app run as root, and pkexec was a way to make that happen. But that was then, and this is now. Does anything in Workstation use pkexec? Does anything in KDE use it? I'm pretty sure (at least I really hope!) nothing in Server uses it. I don't think any of our
well, a simple ag on /usr/{bin,sbin} show presence of pkexec in the following:
root@hal: ~ # ag -l pkexec /usr/bin/
/usr/bin/lshw-gui
/usr/bin/usbview
/usr/bin/system-config-language
/usr/bin/gparted
/usr/bin/ettercap-pkexec
/usr/bin/gsmartcontrol-root
/usr/bin/x11docker
root@hal: ~ # ag -l pkexec /usr/sbin/
/usr/sbin/tuned-gui
so, while my desktop is a simple desktop and could be not representative
at least show some offending applications..
HTH,
Adrian
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