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Bulletproof sudo clobbering, refs #5122

pull/5139/head
Jordi Boggiano 2016-04-01 01:24:31 +01:00
parent 289ef7fbfb
commit dfd22c641d
1 changed files with 3 additions and 3 deletions
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6
src/Composer/Console/Application.php
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@ -133,17 +133,17 @@ class Application extends BaseApplication
$input->setInteractive(false);
}
if (!Platform::isWindows()) {
if (!Platform::isWindows() && function_exists('exec')) {
if (function_exists('posix_getuid') && posix_getuid() === 0) {
$io->writeError('<warning>Running composer as root is highly discouraged as packages, plugins and scripts cannot always be trusted</warning>');
if ($uid = getenv('SUDO_UID')) {
// Silently clobber any sudo credentials on the invoking user to avoid privilege escalations later on
// ref. https://github.com/composer/composer/issues/5119
exec("sudo -u \\#{$uid} sudo -K > /dev/null 2>&1");
Silencer::call('exec', "sudo -u \\#{$uid} sudo -K > /dev/null 2>&1");
}
}
// Silently clobber any remaining sudo leases on the current user as well to avoid privilege escalations
exec("sudo -K > /dev/null 2>&1");
Silencer::call('exec', 'sudo -K > /dev/null 2>&1');
}
// switch working dir