Man pkexec. If PROGRAM is not specified, the default shell will be run.


  1. Man pkexec. \" Manual: pkexec . 6_amd64 NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--disable-internal-agent] [--help] pkexec [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. en. Feb 5, 2021 · Reading [man pkexec(1)](https://manpages. On Linux systems, the sudo command is commonly used to perform tasks requiring administrative privileges. 04. If the calling process is Optional arguments passed directly to the PROGRAM being executed. Les traductions proviennent des sites Debian, Linux Kernel et du projet Perkamon. vendor_url Used for overriding the vendor URL on a per-action basis. com man page documentation. But still you may want to be able to run a program with root privileges. AUTHOR Known annotations The org. If username is not specified, then the program will be executed as the administrative super '\" t . pkexec will run PROGRAM in username 's home directory, unless --keep-cwd is used to override this behavior Note that pkexec does no validation of the ARGUMENTS passed to PROGRAM. " - Rich Cook ← ettercap. My understanding is that pkexec is not the same as using any form of sudo: When to use pkexec vs gksu/gksudo? It's improper to say that: "It seems that on Ubuntu, calls to sudo from the GUI are somehow being intercepted by pkexec ". 11. The advice that is given to be safe is to either update the polkit or remove the Pkexec executable. pkexec doesn't have much in common with sudo. pkexec man page. \" Generator: DocBook XSL Stylesheets vsnapshot . → DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. icon_name Used for overriding the icon name on a per-action basis. In contrast with sudo, pkexec does not grant root permission to an entire process, but rather allows a finer level of control of centralized system policy. > pkexec is installed by default on all major Linux distributions (we exploited Ubuntu, Debian, Fedora, CentOS, and other distributions are probably also exploitable); I don't find it on any of the servers I manage, it appears to be installed with graphical desktop only? i am using a tiling window manager dwm. In addition the PKEXEC_UID environment variable is set to the user id of the process invoking pkexec. exec authorization is required unless an action definition file is present for the program in question. (don’t forget to change "ettercap" to "ettercap-pkexec" as caller program). exec. man pkexec (1): Execute a command as another userSECURITY NOTES Executing a program as another user is a privileged operation. However, when policy agent kit asking to authorize request, there is no enough information to make a decision pkexec - Execute a command as another user | linux commands examples - Thousands of examples to help you to the Force of the Command Line. RETURN VALUE Upon successful completion, the return value is the return value of PROGRAM. So far, the Universe is winning. bionic (1) pkexec. If username is not specified, then the program will be executed as … PKEXEC(1) pkexec PKEXEC(1) NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--disable-internal-agent] [--help] pkexec [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. imply annotation (its value is a string containing a space separated list of action identifiers) can be used to define meta actions. The problem occurs because pkexec doesn’t handle command-line arguments suse operating system manual for pkexec section 1 of the unix. This is free and open source software. pkexec is a command-line utility designed to execute commands as another user, typically the superuser (root), leveraging the PolicyKit (polkit) authorization framework. Aug 26, 2025 · ettercap-common Ettercap supports active and passive dissection of many protocols (even encrypted ones) and includes many feature for network and host analysis. Author Apr 29, 2024 · pkexec补充说明语法选项返回值示例参考资料 当前仓库搜集了 570 多个 Linux 命令，内容包含 Linux 命令手册、详解、学习，内容来自网络和网友的补充，非常值得收藏的 Linux 命令速查手册. Jan 28, 2022 · Overview CVE-2021-4034 is a local privilege escalation vulnerability affecting the pkexec utility commonly found on Linux distributions. example: ettercap-pkexec -G will start ettercap with root privileges and the GTK2 interface. However, if you encounter errors with sudo, such as an invalid sudoers file or blocked programs, pkexec offers a reliable alternative for executing commands as the root user. If username is not specified, then the program will be executed as the Known annotations The org. html. This behavior can be turned off by passing the --disable-internal-agent option. pages. path annotation is used by the pkexec program shipped with polkit - see the pkexec(1) man page for details. Apr 29, 2013 · Reading these questions and answers: When to use pkexec vs. Many sniffing modes are implemented, for a powerful and complete sniffing suite AUTHENTICATION AGENT pkexec, like any other polkit application, will use the authentication agent registered for the calling process or session. " - Rich Cook debian operating system manual for pkexec section 1 of the unix. Note that pkexec does no validation of the ARGUMENTS passed to PROGRAM. If username is not specified, t Feb 9, 2025 · After looking at man pkexec I will say congratulations, you just executed a command as another user. Known as CVE-2021-4034 or "PwnKit," this issue had been hiding in the code since it was first introduced back in May 2009. In the normal case (where administrator authentication is required every time pkexec is used), this is not a problem since if the user is an administrator he might as well just run pkexec bash to get root. pkexec allows an authorized user to execute PROGRAM as another user. … launcher for ettercap. By default the required authorization (See the section called "REQUIRED AUTHORIZATIONS") requires administrator authentication. \" Source May 17, 2025 · Ettercap-pkexec is a version of Ettercap (a comprehensive suite for man-in-the-middle attacks) that runs with pkexec (PolicyKit execution), allowing it to gain root privileges without requiring a direct sudo or su session. NOTES "PKEXEC" "1" "May 2009" "polkit" "pkexec" Page d'accueil du man Cette page de documentation est issue d'une conversion automatique de developpez. If username is not specified, then the program will be executed as the administrative super user, root. May 28, 2018 · 今天在帮一个群友解决关于www-data用户实用sudo问题时，由于错误的用vim修改了/etc/sudoers文件导致sudo命令无法使用的问题。经过 Apr 11, 2022 · I came to know that most linux distros (including Ubuntu) have a vulnerability due to PKEXEC. pkexec (1) man page. Mar 4, 2015 · The problem is this (from “man pkexec”): The environment that PROGRAM will run it, will be set to a minimal known and safe environment in order to avoid injecting code through sirikali. May 31, 2023 · pkexec allows an authorized user to execute a command as another user. \" Title: pkexec . From a terminal, you can use pkexec thunar to run Thunar as root. Jul 6, 2021 · I am using Ubuntu Mate 20. pkexec(1) pkexec pkexec(1) NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--help] pkexec [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. html) I see that I can still add custom actions so I can customize the message to the user when the polkit-agent appears. 漏洞描述2022-01-25，CVE-2021-4034利用详情发布，该漏洞是Qualys研究团队在polkit的pkexec中发现的一个内存损坏漏洞，允许非特权用户获取root权限。根据 NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--disable-internal-agent] [--help] pkexec [--keep-cwd] [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. 1. 18. RETURN VALUE Upon May 13, 2015 · Following information is available from man pkexec:- The environment that PROGRAM will run it, will be set to a minimal known and safe environment in order to avoid injecting code through LD_LIBRARY_PATH or similar mechanisms. Data injection in an established connection and filtering (substitute or drop a packet) on the fly is also possible, keeping the connection synchronized. AUTHOR man ettercap-pkexec (8): graphical pkexec-based launcher for ettercapLast words "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. debian. gz Provided by: policykit-1_0. 04 and pkexec to launch apps with admin privileges if needed. NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--disable-internal-agent] [--help] pkexec [--keep-cwd] [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. archlinux. AUTHENTICATION AGENT pkexec, like any other polkit application, will use the authentication agent registered for the calling process or session. But that doesn't work for nautilus or gedit Another DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. I'm not sure which command, since you didn't include a PROGRAM after pkexec. Optional. Run command as root: pkexec {{command}} Switch user to root: pkexec Run command as a specific user: pkexec --user {{username}} {{command}} Mar 7, 2024 · Explore Polkit authorization on Linux with our detailed guide on Polkit and D-Bus, and learn how to use pkaction, pkcheck, and pkexec utilities. Jan 24, 2025 · While pkexec saw widespread adoption and exploiting the flaw posed little challenge, PwnKit prompted a flurry of security warnings. \" Date: May 2009 . Asks for password in a GUI if available. The vulnerability was disclosed on January 25, 2022. More information: https://polkit. If you look at 'man pkexec' I think you find some really good info. If PROGRAM is not specified, the default shell will be run. org/experimental/policykit-1/pkexec. 8: Multipurpose sniffer/content filter for man in the middle attacks ettercap_curses. policykit. gksu/gksudo? Why is gksu no longer installed by default? brought me another one that will create problems for new users of that command: AUTHENTICATION AGENT pkexec, like any other PolicyKit application, will use the authentication agent registered for the calling process. This method is particularly useful for understanding how attackers might gain unauthorized access and for learning how to defend against such attacks. Dec 18, 2024 · Introduction In early 2022, a major security problem was found in Polkit’s pkexec tool, which is used by many Linux systems to manage permissions between regular users and system processes. If username is not specified, then the program will be executed as the pkexec === 以其他用户身份执行命令 ## 补充说明 **pkexec** 允许授权用户以另一个用户的身份执行 PROGRAM。 如果未指定 PROGRAM，则将运行默认 shell。 下面是对 pkexec 命令的详细介绍和优化，以助于计算机学生和专业人士更好地理解和使用这一命令。 Linux pkexec命令介绍 pkexec （PolicyKit Execution），提供了一种机制，允许非特权用户执行定义在PolicyKit政策中的特权程序。 Aug 22, 2022 · It is a memory corruption vulnerability discovered in the pkexec command (installed on all major Linux distributions), dubbed PwnKit, and assigned CVE-2021–4034. It contains, among its many commands, a single command with this form: Code: pkexec rsync <arguments This element may appear zero or more times. I had to create a special policy file in /usr/share/polkit-1/actions, and I used some of the files in there as an example. Discover every day ! Jul 25, 2016 · I know that gksu is deprecated, and I was under the impression that sudo -i is how we should run graphical applications as root without killing kittens, but someone commented ' pkexec is the new gksu '. 10 the gksu and gksudo commands have dissapeared from the repositories. PKEXEC (1) pkexec PKEXEC (1) NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--disable-internal-agent] [--help] pkexec [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. --help Show a brief help message Aug 26, 2015 · The man page for pkexec(1) says By default, the org. RETURN VALUE ¶ Upon successful completion pkexec [version] [disable-internal-agent] [help] pkexec [user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. The org. See pkexec (1) for an example of how this can be used. Jan 31, 2023 · I am trying to run desktop shortcut as root user, willing to see password prompt on opening shortcut. ETTERCAP(8) ETTERCAP(8) NAME ettercap-pkexec - graphical pkexec-based launcher for ettercap This launcher depends on policykit-1 and the menu packages, and basi So far, the Universe is winning. RETURN VALUE Upon pkexec allows an authorized user to execute PROGRAM as another user. . pkexec is SiriKali's internal tool and it is not mean to be used outside of SiriKali. The vulnerability was discovered by Qualys and given the nickname of pwnkit. \" Author: [see the "AUTHOR" section] . However, if an action is used for which the user can retain authorization (or if the user is implicitly authorized Dec 3, 2017 · Is it related to known bug with launching pkexec'ed application on Wayland? Please update your question with output of cat /etc/lsb-release, apt-cache policy synaptic, id. and to open a program that needs root privleges such as grub-customizer, i need to open a terminal and type… Apr 16, 2021 · Dear all I have a Bash script called 'syncOut'. Внизу руководства был рекомендован man polkit, посмотрел и в нем ettercap-pkexec (8) man page. pkexec is run commands as another user with polkit authorization Help me understand pkexec View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Networking & Security pkexec:以其他用户身份执行命令 - 最专业的Linux命令大全，内容包含Linux命令手册、详解、学习，值得收藏的Linux命令速查手册。 pkexec man page. However, if no authentication agent is available, then pkexec will register its own textual authentication agent. pkexec pkexec Execute commands as another user. org/polkit/pkexec. 105-20ubuntu0. centos operating system manual for pkexec section 1 of the unix. pkexec allows an authorized user to execute PROGRAM as another user. 这个命令将显示 pkexec 的使用说明和选项列表。 请注意，使用 pkexec 运行命令时，系统会提示你输入管理员密码进行身份验证。 确保只在必要时使用 pkexec 来运行需要管理员权限的命令，并小心谨慎地处理管理员权限。 参考资料 https://man. If the calling process is not authorized or an authorization pkexec is a command-line tool for executing commands as another user, typically root, in openSUSE Linux distributions. Starting from Ubuntu 17. 6k次。本文介绍pkexec工具，它允许授权用户以其他用户身份执行程序。默认情况下，此操作需要管理员权限，并通过身份验证对话框提示用户。文章还提供了如何自定义授权及显示信息的示例。 DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. (don't forget to change "ettercap" to "ettercap-pkexec" as caller program). pkexec (1) man page. Jun 16, 2013 · Quoting from man pkexec To specify what kind of authorization is needed to execute the program /usr/bin/pk-example-frobnicate as another user, simply write an action definition file like this Help me understand pkexec View unanswered posts View posts from last 24 hours Gentoo Forums Forum Index Networking & Security pkexec /usr/sbin/synaptic Захотелось разобраться как это работает. | Command line arguments, usage. --version Display the pkexec version information and exit. Oct 25, 2024 · Introduction In this write-up, I will demonstrate how to exploit a vulnerability in the pkexec command to escalate privileges on a Linux system. If username is not specified, then the program will be executed as the Note that pkexec does no validation of the ARGUMENTS passed to PROGRAM. A compilation of Linux man pages for all commands in HTML. Malicious actors moved swiftly to craft and circulate Jan 29, 2022 · 文章浏览阅读7. Exploitation of the vulnerability allows a low privileged user to escalate to root. What is pkexec? pkexec is a command-line utility that allows a user to execute commands as another Aug 16, 2025 · Explains how to run Linux commands as another user or as the root user on Linux using the command-line (CLI) and GUI methods. sirikali. Jul 27, 2022 · As a result, pkexec will not by default allow you to run X11. Please refer to man ettercap for the list of available parameters. Useful for debugging or specific environments where an external agent is guaranteed to be running. DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. Jun 3, 2016 · 终于继续在晚上查的时候，发现了 pkexec 这个命令，然后进入ubuntu系统，进入我的用户，用 pkexec visudo 命令，果真打开了 exc/sudoers 文件，然后将文件改过来，按照步骤提示保存下来后，DONE~! pkexec will run PROGRAM in username 's home directory, unless --keep-cwd is used to override this behavior Note that pkexec does no validation of the ARGUMENTS passed to PROGRAM. vendor Used for overriding the vendor on a per-action basis. N'hésitez pas à laisser vos suggestions, avis ou commentaires : 12 commentaires. --disable-internal-agent Prevents pkexec from using its internal authentication agent. In addition, the authentication dialog presented to the user will display the full path to the program to be executed so the user is aware of pkexec PKEXEC(1) pkexec PKEXEC(1) NAME pkexec - Execute a command as another user SYNOPSIS pkexec [--version] [--disable-internal-agent] [--help] pkexec [--user username] PROGRAM [ARGUMENTS] DESCRIPTION pkexec allows an authorized user to execute PROGRAM as another user. en Jan 26, 2022 · 1. В man pkexec написано, что pkexec предназначена для выполнения команды от имени другого пользователя. 8: Man page for the ncurses gui. com. In this tutorial we learn how to install pkexec on Ubuntu 22. org/man/pkexec. freedesktop. pkexec does the thing, but it doesn't change user - either i run it from terminal - it always g NAME ¶ pkexec - Execute a command as another user SYNOPSIS ¶ pkexec [--version] [--disable-internal-agent] [--help] pkexec [--user username] PROGRAM [ARGUMENTS] DESCRIPTION ¶ pkexec allows an authorized user to execute PROGRAM as another user. pkexec, like any other polkit application, will use the authentication agent registered for the calling process or session. If username is not specified, then the program will be executed as the NAME ¶ pkexec - Execute a command as another user SYNOPSIS ¶ pkexec [--version] [--disable-internal-agent] [--help] pkexec [--keep-cwd] [--user username] PROGRAM [ARGUMENTS] DESCRIPTION ¶ pkexec allows an authorized user to execute PROGRAM as another user. RETURN VALUE Upon successful completion, the return AUTHENTICATION AGENT pkexec, like any other PolicyKit application, will use the authentication agent registered for the calling process. While there are many such vulnerabilities Dec 26, 2020 · It's been a long time ago, and I only did this once, but I used pkexec with a policykit action. The commands available are exactly the same as the ettercap man page. 6wooe pzg ckxjk egxj vb9w i4xio atda 8rs hl6 zzwj