mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-24 21:38:07 -05:00
gnu: spice: Fix CVE-2017-7506.
* gnu/packages/patches/spice-CVE-2017-7506.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/spice.scm (spice)[source]: Use it.
This commit is contained in:
Leo Famulari
parent
301565266f
commit
d89ce52096
3 changed files with 161 additions and 1 deletions
|
|
@ -1006,6 +1006,7 @@ dist_patch_DATA = \
|
|||
%D%/packages/patches/spice-CVE-2016-9577.patch \
|
||||
%D%/packages/patches/spice-CVE-2016-9578-1.patch \
|
||||
%D%/packages/patches/spice-CVE-2016-9578-2.patch \
|
||||
%D%/packages/patches/spice-CVE-2017-7506.patch \
|
||||
%D%/packages/patches/steghide-fixes.patch \
|
||||
%D%/packages/patches/superlu-dist-scotchmetis.patch \
|
||||
%D%/packages/patches/swish-e-search.patch \
|
||||
|
|
|
|||
158
gnu/packages/patches/spice-CVE-2017-7506.patch
Normal file
158
gnu/packages/patches/spice-CVE-2017-7506.patch
Normal file
|
|
@ -0,0 +1,158 @@
|
|||
Fix CVE-2017-7506:
|
||||
|
||||
https://bugzilla.redhat.com/show_bug.cgi?id=1452606
|
||||
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7506
|
||||
|
||||
Patches copied from Debian spice package version
|
||||
'spice_0.12.8-2.1+deb9u1.debian.tar.xz':
|
||||
http://security.debian.org/debian-security/pool/updates/main/s/spice/spice_0.12.8-2.1+deb9u1.debian.tar.xz
|
||||
|
||||
The patches had to be adapted to apply to the latest spice tarball, and
|
||||
are based on these upstream commits:
|
||||
|
||||
https://cgit.freedesktop.org/spice/spice/commit/?id=111ab38611cef5012f1565a65fa2d8a8a05cce37
|
||||
https://cgit.freedesktop.org/spice/spice/commit/?id=571cec91e71c2aae0d5f439ea2d8439d0c3d75eb
|
||||
https://cgit.freedesktop.org/spice/spice/commit/?id=fbbcdad773e2791cfb988f4748faa41943551ca6
|
||||
|
||||
From 257f69d619fed407493156c8a7b952abc8a51314 Mon Sep 17 00:00:00 2001
|
||||
Date: Mon, 15 May 2017 15:57:28 +0100
|
||||
Subject: [spice-server 1/3] reds: Disconnect when receiving overly big
|
||||
ClientMonitorsConfig
|
||||
|
||||
Total message size received from the client was unlimited. There is
|
||||
a 2kiB size check on individual agent messages, but the MonitorsConfig
|
||||
message can be split in multiple chunks, and the size of the
|
||||
non-chunked MonitorsConfig message was never checked. This could easily
|
||||
lead to memory exhaustion on the host.
|
||||
|
||||
---
|
||||
server/reds.c | 25 +++++++++++++++++++++++--
|
||||
1 file changed, 23 insertions(+), 2 deletions(-)
|
||||
|
||||
diff --git a/server/reds.c b/server/reds.c
|
||||
index f439a3668..7be85fdfc 100644
|
||||
--- a/server/reds.c
|
||||
+++ b/server/reds.c
|
||||
@@ -993,19 +993,34 @@ static void reds_client_monitors_config_cleanup(void)
|
||||
static void reds_on_main_agent_monitors_config(
|
||||
MainChannelClient *mcc, void *message, size_t size)
|
||||
{
|
||||
+ const unsigned int MAX_MONITORS = 256;
|
||||
+ const unsigned int MAX_MONITOR_CONFIG_SIZE =
|
||||
+ sizeof(VDAgentMonitorsConfig) + MAX_MONITORS * sizeof(VDAgentMonConfig);
|
||||
+
|
||||
VDAgentMessage *msg_header;
|
||||
VDAgentMonitorsConfig *monitors_config;
|
||||
RedsClientMonitorsConfig *cmc = &reds->client_monitors_config;
|
||||
|
||||
+ // limit size of message sent by the client as this can cause a DoS through
|
||||
+ // memory exhaustion, or potentially some integer overflows
|
||||
+ if (sizeof(VDAgentMessage) + MAX_MONITOR_CONFIG_SIZE - cmc->buffer_size < size) {
|
||||
+ goto overflow;
|
||||
+ }
|
||||
cmc->buffer_size += size;
|
||||
cmc->buffer = realloc(cmc->buffer, cmc->buffer_size);
|
||||
spice_assert(cmc->buffer);
|
||||
cmc->mcc = mcc;
|
||||
memcpy(cmc->buffer + cmc->buffer_pos, message, size);
|
||||
cmc->buffer_pos += size;
|
||||
+ if (sizeof(VDAgentMessage) > cmc->buffer_size) {
|
||||
+ spice_debug("not enough data yet. %d", cmc->buffer_size);
|
||||
+ return;
|
||||
+ }
|
||||
msg_header = (VDAgentMessage *)cmc->buffer;
|
||||
- if (sizeof(VDAgentMessage) > cmc->buffer_size ||
|
||||
- msg_header->size > cmc->buffer_size - sizeof(VDAgentMessage)) {
|
||||
+ if (msg_header->size > MAX_MONITOR_CONFIG_SIZE) {
|
||||
+ goto overflow;
|
||||
+ }
|
||||
+ if (msg_header->size > cmc->buffer_size - sizeof(VDAgentMessage)) {
|
||||
spice_debug("not enough data yet. %d", cmc->buffer_size);
|
||||
return;
|
||||
}
|
||||
@@ -1013,6 +1028,12 @@ static void reds_on_main_agent_monitors_config(
|
||||
spice_debug("%s: %d", __func__, monitors_config->num_of_monitors);
|
||||
red_dispatcher_client_monitors_config(monitors_config);
|
||||
reds_client_monitors_config_cleanup();
|
||||
+ return;
|
||||
+
|
||||
+overflow:
|
||||
+ spice_warning("received invalid MonitorsConfig request from client, disconnecting");
|
||||
+ red_channel_client_disconnect(main_channel_client_get_base(mcc));
|
||||
+ reds_client_monitors_config_cleanup();
|
||||
}
|
||||
|
||||
void reds_on_main_agent_data(MainChannelClient *mcc, void *message, size_t size)
|
||||
--
|
||||
2.13.0
|
||||
From ff2b4ef70181087d5abd50bad76d026ec5088a93 Mon Sep 17 00:00:00 2001
|
||||
Date: Mon, 15 May 2017 15:57:28 +0100
|
||||
Subject: [spice-server 2/3] reds: Avoid integer overflows handling monitor
|
||||
configuration
|
||||
|
||||
Avoid VDAgentMessage::size integer overflows.
|
||||
|
||||
---
|
||||
server/reds.c | 3 +++
|
||||
1 file changed, 3 insertions(+)
|
||||
|
||||
diff --git a/server/reds.c b/server/reds.c
|
||||
index 7be85fdfc..e1c8c1086 100644
|
||||
--- a/server/reds.c
|
||||
+++ b/server/reds.c
|
||||
@@ -1024,6 +1024,9 @@ static void reds_on_main_agent_monitors_config(
|
||||
spice_debug("not enough data yet. %d", cmc->buffer_size);
|
||||
return;
|
||||
}
|
||||
+ if (msg_header->size < sizeof(VDAgentMonitorsConfig)) {
|
||||
+ goto overflow;
|
||||
+ }
|
||||
monitors_config = (VDAgentMonitorsConfig *)(cmc->buffer + sizeof(*msg_header));
|
||||
spice_debug("%s: %d", __func__, monitors_config->num_of_monitors);
|
||||
red_dispatcher_client_monitors_config(monitors_config);
|
||||
--
|
||||
2.13.0
|
||||
From 8cc3d7df2792751939cc832f4110c57e2addfca5 Mon Sep 17 00:00:00 2001
|
||||
Date: Mon, 15 May 2017 15:57:28 +0100
|
||||
Subject: [spice-server 3/3] reds: Avoid buffer overflows handling monitor
|
||||
configuration
|
||||
|
||||
It was also possible for a malicious client to set
|
||||
VDAgentMonitorsConfig::num_of_monitors to a number larger
|
||||
than the actual size of VDAgentMOnitorsConfig::monitors.
|
||||
This would lead to buffer overflows, which could allow the guest to
|
||||
read part of the host memory. This might cause write overflows in the
|
||||
host as well, but controlling the content of such buffers seems
|
||||
complicated.
|
||||
|
||||
---
|
||||
server/reds.c | 7 +++++++
|
||||
1 file changed, 7 insertions(+)
|
||||
|
||||
diff --git a/server/reds.c b/server/reds.c
|
||||
index e1c8c1086..3a42c3755 100644
|
||||
--- a/server/reds.c
|
||||
+++ b/server/reds.c
|
||||
@@ -1000,6 +1000,7 @@ static void reds_on_main_agent_monitors_config(
|
||||
VDAgentMessage *msg_header;
|
||||
VDAgentMonitorsConfig *monitors_config;
|
||||
RedsClientMonitorsConfig *cmc = &reds->client_monitors_config;
|
||||
+ uint32_t max_monitors;
|
||||
|
||||
// limit size of message sent by the client as this can cause a DoS through
|
||||
// memory exhaustion, or potentially some integer overflows
|
||||
@@ -1028,6 +1029,12 @@ static void reds_on_main_agent_monitors_config(
|
||||
goto overflow;
|
||||
}
|
||||
monitors_config = (VDAgentMonitorsConfig *)(cmc->buffer + sizeof(*msg_header));
|
||||
+ // limit the monitor number to avoid buffer overflows
|
||||
+ max_monitors = (msg_header->size - sizeof(VDAgentMonitorsConfig)) /
|
||||
+ sizeof(VDAgentMonConfig);
|
||||
+ if (monitors_config->num_of_monitors > max_monitors) {
|
||||
+ goto overflow;
|
||||
+ }
|
||||
spice_debug("%s: %d", __func__, monitors_config->num_of_monitors);
|
||||
red_dispatcher_client_monitors_config(monitors_config);
|
||||
reds_client_monitors_config_cleanup();
|
||||
--
|
||||
2.13.0
|
||||
|
|
@ -211,7 +211,8 @@ (define-public spice
|
|||
(base32
|
||||
"0za03i77j8i3g5l2np2j7vy8cqsdbkm9wbv4hjnaqq9xhz2sa0gr"))
|
||||
(patches
|
||||
(search-patches "spice-CVE-2016-9577.patch"
|
||||
(search-patches "spice-CVE-2017-7506.patch"
|
||||
"spice-CVE-2016-9577.patch"
|
||||
"spice-CVE-2016-9578-1.patch"
|
||||
"spice-CVE-2016-9578-2.patch"))))
|
||||
(build-system gnu-build-system)
|
||||
|
|
|
|||
Loading…
Reference in a new issue