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locking: restrict sockets to mode 0600

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The virtlockd daemon's only intended client is the libvirtd daemon. As
such it should never allow clients from other user accounts to connect.
The code already enforces this and drops clients from other UIDs, but
we can get earlier (and thus stronger) protection against DoS by setting
the socket permissions to 0600

Fixes CVE-2019-10132

Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
(cherry picked from commit f111e09468)
This commit is contained in:
Daniel P. Berrangé 2019-04-30 16:51:37 +01:00
parent acf1763033
commit 93d9f05684
2 changed files with 2 additions and 0 deletions
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1
src/locking/virtlockd-admin.socket.in
View File

@ -5,6 +5,7 @@ Before=libvirtd.service
[Socket] [Socket]
ListenStream=@localstatedir@/run/libvirt/virtlockd-admin-sock ListenStream=@localstatedir@/run/libvirt/virtlockd-admin-sock
Service=virtlockd.service Service=virtlockd.service
SocketMode=0600
[Install] [Install]
WantedBy=sockets.target WantedBy=sockets.target

1
src/locking/virtlockd.socket.in
View File

@ -4,6 +4,7 @@ Before=libvirtd.service
[Socket] [Socket]
ListenStream=@localstatedir@/run/libvirt/virtlockd-sock ListenStream=@localstatedir@/run/libvirt/virtlockd-sock
SocketMode=0600
[Install] [Install]
WantedBy=sockets.target WantedBy=sockets.target