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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 f111e09468693909b1f067aa575efdafd9a262a1)
This commit is contained in:
Daniel P. Berrangé 2019-04-30 16:51:37 +01:00
parent dfd22fc50f
commit 54005b84b0
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]
ListenStream=@localstatedir@/run/libvirt/virtlockd-admin-sock
Service=virtlockd.service
SocketMode=0600
[Install]
WantedBy=sockets.target

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

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