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Re-allow running Dolphin as the root user (but still not using sudo)
Summary: Prohibiting the use of Dolphin as the actual root user (not using `sudo` or `kdesu`) breaks legitimate use cases for using the root user. An example is Kali, a distro that logs in as the root user by default as a deliberate design choice. In such an environment, there is no additional security vulnerability beyond what you're already potentially exposing yourself to. So, let's re-enable it. BUG: 387974 FIXED-IN: 18.08.0 Test Plan: - Log in as normal user and run `sudo dolphin`: you get an error message. - Log in as normal user and run `kdesu dolphin`: you get an error message. - Log in as the root user and run dolphin normally: it works. Reviewers: markg, elvisangelaccio, #dolphin Reviewed By: markg Subscribers: chinmoyr, cfeck, elvisangelaccio, mmustac, Fuchs, markg, graesslin, nicolasfella, zzag, kfm-devel, emmanuelp Tags: #dolphin Differential Revision: https://phabricator.kde.org/D12795
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src/main.cpp
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src/main.cpp
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@ -43,10 +43,15 @@
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extern "C" Q_DECL_EXPORT int kdemain(int argc, char **argv)
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{
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#ifndef Q_OS_WIN
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// Check whether we are running as root
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// Prohibit using sudo or kdesu (but allow using the root user directly)
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if (getuid() == 0) {
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std::cout << "Executing Dolphin as root is not possible." << std::endl;
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return EXIT_FAILURE;
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if (!qEnvironmentVariableIsEmpty("SUDO_USER")) {
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std::cout << "Executing Dolphin with sudo is not possible due to unfixable security vulnerabilities." << std::endl;
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return EXIT_FAILURE;
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} else if (!qEnvironmentVariableIsEmpty("KDESU_USER")) {
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std::cout << "Executing Dolphin with kdesu is not possible due to unfixable security vulnerabilities." << std::endl;
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return EXIT_FAILURE;
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}
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}
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#endif
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