diff options
Diffstat (limited to 'recipes-support/spice/files/CVE-2017-7506-3.patch')
-rw-r--r-- | recipes-support/spice/files/CVE-2017-7506-3.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/recipes-support/spice/files/CVE-2017-7506-3.patch b/recipes-support/spice/files/CVE-2017-7506-3.patch new file mode 100644 index 00000000..d55502fe --- /dev/null +++ b/recipes-support/spice/files/CVE-2017-7506-3.patch @@ -0,0 +1,54 @@ +From daedc2e2bb70f7cb0eafd65fd37fd73af12df770 Mon Sep 17 00:00:00 2001 +From: Frediano Ziglio <fziglio@redhat.com> +Date: Mon, 15 May 2017 15:57:28 +0100 +Subject: [PATCH 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. + +Signed-off-by: Frediano Ziglio <fziglio@redhat.com> + +Upstream-Status: Backport +[https://cgit.freedesktop.org/spice/spice/commit/?h=0.12&id=a957a90baf2c62d31f3547e56bba7d0e812d2331] + +CVE: CVE-2017-7506 + +Signed-off-by: Yi Zhao <yi.zhao@windriver.com> +--- + server/reds.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +diff --git a/server/reds.c b/server/reds.c +index 62b1164..ee36dec 100644 +--- a/server/reds.c ++++ b/server/reds.c +@@ -1093,6 +1093,7 @@ 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 +@@ -1121,6 +1122,12 @@ 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\n", __func__, monitors_config->num_of_monitors); + red_dispatcher_client_monitors_config(monitors_config); + reds_client_monitors_config_cleanup(); +-- +2.7.4 + |