#polkit

[polkit-unofficial]

Pinned Post :3

hai I’m Azamina :3 my main is @strongest-soldier-jyl

This is a sideblog that is intended to be similar to the many other oss-official blogs like x11-official, kde-plasma-official, etc.

I intend to dump my tech related ramblings here :3

Feel free to send asks rambling about anything tech related too! I love hearing people gush about how they finally got some technology working on their machine or whatever :3 be excited! i love seeing you all excited :3

Some stuff that’s less about the blog and more about me under the cut

I’ve cycled through a number of different distros and always enjoy trying new ones for fun. My main machines do use Arch :3

I use Neovim for editing, with clangd and rust-analyzer as my LSP servers of choice for C(++) and Rust respectively :3

I have lots of other interests too (feel free to check my main if you wanna talk games and fandom and stuff :3)

[orbitbrain]

CISA Says 'PwnKit' Linux Vulnerability Exploited in Attacks

CISA Says ‘PwnKit’ Linux Vulnerability Exploited in Attacks

Home › Virus & Threats CISA Says ‘PwnKit’ Linux Vulnerability Exploited in Attacks By Eduard Kovacs on June 28, 2022 Tweet The US Cybersecurity and Infrastructure Security Agency (CISA) says a Linux vulnerability tracked as CVE-2021-4034 and PwnKit has been exploited in attacks. The flaw, which came to light in January, affects Polkit, a component designed for controlling system-wide privileges…

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[reportwire]

Old Code Can Give Root To Unprivileged Users

Old Code Can Give Root To Unprivileged Users

It looks like IT teams have no respite. Following all the hassles caused by Log4j (and its variants), there is a new high profile, high-risk vulnerability making the rounds. CVE-2021-4034, or PwnKit if you’re into fancy CVE nicknames, is a polkit vulnerability that lets unprivileged users gain root privileges on basically any Linux system out there that has polkit installed. NOTE: Patches are now…

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[dikleyt]

Linux system service bug gives root on all major distros, exploit released

A vulnerability in Polkit's pkexec component identified as CVE-2021-4034 (PwnKit) is present in the default configuration of all major Linux distributions and can be exploited to gain full root privileges on the system, researchers warn today.

[cyber-x-linux]

В системной утилите Polkit была обнаружена 12-летняя уязвимость, которая предоставляет злоумышленникам привилегии суперпользователя в систем

[ushf]

Polkit, libvirt and CentOS 6.5 local user

PolKit has two types of configuration items: rules and actions. The actions available to the application are defined in XML files stored in /usr/share/polkit-1/actions. After version 0.106 of polkit (CentOS-6.5 is 0.96-5) the rules controlling the privilege of the application are written in JavaScript.. For CentOS-6.5 we need to follow the old instructions using the pkla formatted rules instead.

rpm -qi polkit* polkit-gnome-0.96-3.el6.x86_64 polkit-0.96-5.el6_4.x86_64 polkit-desktop-policy-0.96-5.el6_4.noarch

We can re-configure the default local authority, which starts off with an empty set of local rules, and add in one with a unique name ending in the the extension .pkla Reverse DNS naming schemes are suggested in the manpage. :

# ls -al /etc/polkit-1/localauthority/50-local.d/ total 8 drwxr-xr-x. 2 root root 4096 Sep 19 2013 . drwx------. 7 root root 4096 Sep 19 2013 ..

to allow access to virt-manager for the session user (named "ush") in this case:

less /etc/polkit-1/localauthority/50-local.d/com.no-ip.rabelais-libvirt-ush.pkla [libvirtd access for user ush] Identity=unix-user:ush Action=org.libvirt.unix.manage ResultAny=yes ResultInactive=yes ResultActive=yes

Now, clicking on the virt-manager icon will bring up the list of managed vms without any need to input the password. There was no need to restart any daemons or explicitly re-load any configuration.

The Arch wiki has good reference material on the post-106 javascript configuration.

[pfsmorigo-floss-blog-blog]

Unable to connect to libvirt (authentication failed: polkit)

If you don't use gnome as your window manager and starts virt-manager, you might get the error bellow:

Unable to connect to libvirt. authentication failed: polkit: polkit\56retains_authorization_after_challenge=1 Authorization requires authentication but no agent is available. Libvirt URI is: qemu:///system Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1027, in _open_thread self.vmm = self._try_open() File "/usr/share/virt-manager/virtManager/connection.py", line 1009, in _try_open flags) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirtError: authentication failed: polkit: polkit\56retains_authorization_after_challenge=1 Authorization requires authentication but no agent is available.

As the error says, this happens because the authentication agent is not available. You have two options: run the agent or disable the check.

Option 1: Run the agent

In fedora the agent is in the /usr/libexec/, just run it. You can put this in yours window manager file in order to run everytime you start a session:

/usr/libexec/polkit-gnome-authentication-agent-1 &

Done! Now when you run virt-manager again, a box asking for the password will be shown.

Option 2: Disable the check

Edit the file /usr/share/polkit-1/actions/org.libvirt.unix.policy file and change the lines with the values bellow:

<allow_any>auth_admin</allow_any> <allow_inactive>auth_admin</allow_inactive> <allow_active>auth_admin_keep</allow_active>

To:

<allow_any>yes</allow_any> <allow_inactive>yes</allow_inactive> <allow_active>yes</allow_active>

Done! The error disappears!