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60 lines
3.7 KiB
60 lines
3.7 KiB
2 years ago
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From d11fdacaf3c804b60dfe8371062f34ac2b624ac9 Mon Sep 17 00:00:00 2001
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From: Jan Synacek <jsynacek@redhat.com>
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Date: Fri, 13 Sep 2019 09:23:32 +0200
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Subject: [PATCH] man: document systemd-analyze security
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(cherry-picked from commit ee93c1e664a7bbc59f1578e285c871999507b14d)
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Resolves: #1750343
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---
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man/systemd-analyze.xml | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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diff --git a/man/systemd-analyze.xml b/man/systemd-analyze.xml
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index 7aa10fc68e..f3b595880f 100644
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--- a/man/systemd-analyze.xml
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+++ b/man/systemd-analyze.xml
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@@ -106,6 +106,12 @@
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<arg choice="plain">service-watchdogs</arg>
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<arg choice="opt"><replaceable>BOOL</replaceable></arg>
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</cmdsynopsis>
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+ <cmdsynopsis>
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+ <command>systemd-analyze</command>
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+ <arg choice="opt" rep="repeat">OPTIONS</arg>
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+ <arg choice="plain">security</arg>
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+ <arg choice="plain" rep="repeat"><replaceable>UNIT</replaceable></arg>
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+ </cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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@@ -253,6 +259,29 @@ NAutoVTs=8
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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The hardware watchdog is not affected by this setting.</para>
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+ <para><command>systemd-analyze security</command> analyzes the security and sandboxing settings of one or more
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+ specified service units. If at least one unit name is specified the security settings of the specified service
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+ units are inspected and a detailed analysis is shown. If no unit name is specified, all currently loaded,
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+ long-running service units are inspected and a terse table with results shown. The command checks for various
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+ security-related service settings, assigning each a numeric "exposure level" value, depending on how important a
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+ setting is. It then calculates an overall exposure level for the whole unit, which is an estimation in the range
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+ 0.0…10.0 indicating how exposed a service is security-wise. High exposure levels indicate very little applied
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+ sandboxing. Low exposure levels indicate tight sandboxing and strongest security restrictions. Note that this only
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+ analyzes the per-service security features systemd itself implements. This means that any additional security
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+ mechanisms applied by the service code itself are not accounted for. The exposure level determined this way should
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+ not be misunderstood: a high exposure level neither means that there is no effective sandboxing applied by the
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+ service code itself, nor that the service is actually vulnerable to remote or local attacks. High exposure levels
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+ do indicate however that most likely the service might benefit from additional settings applied to them. Please
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+ note that many of the security and sandboxing settings individually can be circumvented — unless combined with
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+ others. For example, if a service retains the privilege to establish or undo mount points many of the sandboxing
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+ options can be undone by the service code itself. Due to that is essential that each service uses the most
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+ comprehensive and strict sandboxing and security settings possible. The tool will take into account some of these
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+ combinations and relationships between the settings, but not all. Also note that the security and sandboxing
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+ settings analyzed here only apply to the operations executed by the service code itself. If a service has access to
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+ an IPC system (such as D-Bus) it might request operations from other services that are not subject to the same
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+ restrictions. Any comprehensive security and sandboxing analysis is hence incomplete if the IPC access policy is
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+ not validated too.</para>
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+
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<para>If no command is passed, <command>systemd-analyze
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time</command> is implied.</para>
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