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Request #72510 systemd service should be hardened
Submitted: 2016-06-28 20:05 UTC Modified: 2018-12-12 16:14 UTC
Votes:1
Avg. Score:3.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: candrews at integralblue dot com Assigned: cmb (profile)
Status: Closed Package: FPM related
PHP Version: Irrelevant OS: Linux
Private report: No CVE-ID: None
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 [2016-06-28 20:05 UTC] candrews at integralblue dot com
Description:
------------
The php-fpm systemd service, php-fpm.service, should use be hardened as much as possible against potential attacks. Besides reducing the likelihood of an attack, if php does get compromised, there will be less damage possible.

I suggest these features be added to the systemd units:
---------------
ProtectHome=true
PrivateTmp=true
ProtectSystem=full
NoNewPrivileges=true
PrivateDevices=true
# Required for dropping privileges and running as a different user
CapabilityBoundingSet=CAP_SETGID CAP_SETUID
---------------

I tested these settings and didn't experience any problems in my (admitted limited) setup. I think they should be fine for anyone except for exceptional and odd situations (ex, php-fpm is setup to read files from /tmp that another services writes to /tmp). For the (very rare) impacted user, they can always override the systemd service - but a secure configuration should be the default.

Test script:
---------------
n/a

Expected result:
----------------
n/a

Actual result:
--------------
n/a

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2018-12-12 16:14 UTC] cmb@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: cmb
 [2018-12-12 16:14 UTC] cmb@php.net
This feature request has been implemented as commit 40c4d7f[1].

[1] <http://git.php.net/?p=php-src.git;a=commit;h=40c4d7f1820df1872a71ab07fd26da45a203e37f>
 
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