From: Arne Fitzenreiter <arne_f@ipfire.org>
Date: Sun, 19 Apr 2020 17:18:04 +0000 (+0200)
Subject: dhcpcd: create dhcpcd user and chroot folder
X-Git-Tag: v2.25-core144~28
X-Git-Url: http://git.ipfire.org/?p=ipfire-2.x.git;a=commitdiff_plain;h=533c4312fad295d520f8ccef40e3e1b9f2b1b7f6

dhcpcd: create dhcpcd user and chroot folder

dhcpcd 9.x adds privelege seperation by creating a chroot
and running parts of the client not as root.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
---

diff --git a/config/etc/group b/config/etc/group
index 4855214be0..f1767b30cd 100644
--- a/config/etc/group
+++ b/config/etc/group
@@ -20,6 +20,7 @@ dip:x:40:
 ftp:x:45:
 rsyncd:x:48:
 stunnel:x:51:
+dhcpcd:x:52:
 lock:x:54:
 sshd:x:74:
 pcap:x:77:
diff --git a/config/etc/passwd b/config/etc/passwd
index 7893b43c97..cb04280851 100644
--- a/config/etc/passwd
+++ b/config/etc/passwd
@@ -7,6 +7,7 @@ ntp:x:38:38::/etc/ntp:/bin/false
 ftp:x:45:45:anonymous_user:/home/ftp:/bin/false
 rsyncd:x:48:48:rsyncd Daemon:/home/rsync:/bin/false
 stunnel:x:51:51:stunnel Daemon:/var/lib/stunnel:/bin/false
+dhcpcd:x:52:52:dhcpcd privsep user:/run/dhcpcd/chroot:/bin/false
 sshd:x:74:74:sshd:/var/empty:/bin/false
 nobody:x:99:99:Nobody:/home/nobody:/bin/false
 postfix:x:100:100::/var/spool/postfix:/bin/false
diff --git a/src/initscripts/system/mountkernfs b/src/initscripts/system/mountkernfs
index f7be82d01e..f0bfc52890 100644
--- a/src/initscripts/system/mountkernfs
+++ b/src/initscripts/system/mountkernfs
@@ -34,6 +34,11 @@ case "${1}" in
 			mount -n -t tmpfs -o nosuid,nodev,mode=755,size=8M /run /run || failed=1
 		fi
 
+		# create folder for dhcpcd changeroot
+		mkdir -p /run/dhcpcd/chroot
+		chown dhcpcd:dhcpcd /run/dhcpcd/chroot
+		chmod 750 /run/dhcpcd/chroot
+
 		boot_mesg "" ${NORMAL}
 
 		(exit ${failed})