Phusion Passenger无法以root用户身份运行-警告：潜在的特权升级漏洞

Question

嗨，我正在尝试通过乘客和apache2将我的rails应用程序部署到VPS，但是我收到错误

   [ W 2018-02-14 21:02:37.0342 9640/T1 age/Cor/CoreMain.cpp:969 ]: WARNING: potential privilege escalation vulnerability. Phusion Passenger is running as root, and part(s) of the passenger root path (/home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/passenger-5.2.0) can be changed by non-root user(s):
    The path "/home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/passenger-5.2.0" can be modified by user "deploy" (or applications running as that user). Change the owner of the path to root, or avoid running Passenger as root.
    The path "/home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/passenger-5.2.0" is writeable by any user (or application). Limit write access on the path to only the root user/group.
    The path "/home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems" can be modified by user "deploy" (or applications running as that user). Change the owner of the path to root, or avoid running Passenger as root.
    The path "/home/deploy/.rvm/gems/ruby-2.4.1@spelld.it" can be modified by user "deploy" (or applications running as that user). Change the owner of the path to root, or avoid running Passenger as root.
    The path "/home/deploy/.rvm/gems" can be modified by user "deploy" (or applications running as that user). Change the owner of the path to root, or avoid running Passenger as root.
    The path "/home/deploy/.rvm" can be modified by user "deploy" (or applications running as that user). Change the owner of the path to root, or avoid running Passenger as root.
    The path "/home/deploy" can be modified by user "deploy" (or applications running as that user). Change the owner of the path to root, or avoid running Passenger as root.

我尝试更改权限，但无法使用

sudo chmod 700 /home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/passenger-5.2.0

和

sudo chown root:root /home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/passenger-5.2.0

我什至发现有相同问题的问题，但我不知道如何解决。。。 如何避免Phusion Passenger以root身份运行？

Answer 1

乘客作者在这里。 您可以做的另一件事是使用root用户而不是用户“ deploy”来安装RVM Ruby和Passenger。 这样，您的Ruby安装和Passenger安装由root拥有，并且您不会看到此警告。

甚至更好：使用我们的本地Debian / Ubuntu / CentOS软件包。

Answer 2

我也想提供一些见解。 @ Hongli的答案还不是全部。 @ Taryn East是正确的。 即使您对每个目录都进行了chown，也需要对每个目录进行chmod才能使Patient正常工作。

在您的示例中，您需要：

chmod 700 /home/deploy/.rvm
chmod 700 /home/deploy/.rvm/gems/
chmod 700 /home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/
chmod 700 /home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/
chmod 700 /home/deploy/.rvm/gems/ruby-2.4.1@spelld.it/gems/passenger-5.2.0