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| -rw-r--r-- | man/systemd.exec.xml | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml index 3f0535726b..41b5d7144d 100644 --- a/man/systemd.exec.xml +++ b/man/systemd.exec.xml @@ -1645,7 +1645,13 @@ SystemCallErrorNumber=EPERM</programlisting> <para> See <citerefentry project='man-pages'><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry> for details - about environment variables.</para></listitem> + about environment variables.</para> + + <para>Note that environment variables are not suitable for passing secrets (such as passwords, key material, …) + to service processes. Environment variables set for a unit are exposed to unprivileged clients via D-Bus IPC, + and generally not understood as being data that requires protection. Moreover, environment variables are + propagated down the process tree, including across security boundaries (such as setuid/setgid executables), and + hence might leak to processes that should not have access to the secret data.</para></listitem> </varlistentry> <varlistentry> |