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From a9fced99a9fb436909cf9df22502f5f7c7479ebb Mon Sep 17 00:00:00 2001
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Message-Id: <a9fced99a9fb436909cf9df22502f5f7c7479ebb@dist-git>
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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
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Date: Wed, 15 May 2019 21:40:57 +0100
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Subject: [PATCH] locking: restrict sockets to mode 0600
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The virtlockd daemon's only intended client is the libvirtd daemon. As
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such it should never allow clients from other user accounts to connect.
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The code already enforces this and drops clients from other UIDs, but
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we can get earlier (and thus stronger) protection against DoS by setting
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the socket permissions to 0600
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Fixes CVE-2019-10132
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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(cherry picked from commit f111e09468693909b1f067aa575efdafd9a262a1)
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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Message-Id: <20190515204058.28077-3-berrange@redhat.com>
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---
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src/locking/virtlockd-admin.socket.in | 1 +
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src/locking/virtlockd.socket.in | 1 +
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2 files changed, 2 insertions(+)
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diff --git a/src/locking/virtlockd-admin.socket.in b/src/locking/virtlockd-admin.socket.in
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index 2a7500f3d0..f674c492f7 100644
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--- a/src/locking/virtlockd-admin.socket.in
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+++ b/src/locking/virtlockd-admin.socket.in
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@@ -5,6 +5,7 @@ Before=libvirtd.service
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[Socket]
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ListenStream=@localstatedir@/run/libvirt/virtlockd-admin-sock
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Service=virtlockd.service
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+SocketMode=0600
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[Install]
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WantedBy=sockets.target
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diff --git a/src/locking/virtlockd.socket.in b/src/locking/virtlockd.socket.in
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index 45e0f20235..d701b27516 100644
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--- a/src/locking/virtlockd.socket.in
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+++ b/src/locking/virtlockd.socket.in
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@@ -4,6 +4,7 @@ Before=libvirtd.service
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[Socket]
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ListenStream=@localstatedir@/run/libvirt/virtlockd-sock
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+SocketMode=0600
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[Install]
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WantedBy=sockets.target
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--
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2.21.0
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