diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/CVE-2021-3713.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2021-3713.patch | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3713.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3713.patch new file mode 100644 index 0000000000..cdd9c38db9 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3713.patch @@ -0,0 +1,67 @@ +From a114d6baedf2cccb454a46d36e399fec1bc3e1c0 Mon Sep 17 00:00:00 2001 +From: Gerd Hoffmann <kraxel@redhat.com> +Date: Wed, 18 Aug 2021 14:05:05 +0200 +Subject: [PATCH] uas: add stream number sanity checks. +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The device uses the guest-supplied stream number unchecked, which can +lead to guest-triggered out-of-band access to the UASDevice->data3 and +UASDevice->status3 fields. Add the missing checks. + +Fixes: CVE-2021-3713 +Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> +Reported-by: Chen Zhe <chenzhe@huawei.com> +Reported-by: Tan Jingguo <tanjingguo@huawei.com> +Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> +Message-Id: <20210818120505.1258262-2-kraxel@redhat.com> + +https://gitlab.com/qemu-project/qemu/-/commit/13b250b12ad3c59114a6a17d59caf073ce45b33a +CVE: CVE-2021-3713 +Upstream-Status: Backport +Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com> +--- + hw/usb/dev-uas.c | 11 +++++++++++ + 1 file changed, 11 insertions(+) + +diff --git a/hw/usb/dev-uas.c b/hw/usb/dev-uas.c +index 6d6d1073..0b8cd4dd 100644 +--- a/hw/usb/dev-uas.c ++++ b/hw/usb/dev-uas.c +@@ -830,6 +830,9 @@ static void usb_uas_handle_data(USBDevice *dev, USBPacket *p) + } + break; + case UAS_PIPE_ID_STATUS: ++ if (p->stream > UAS_MAX_STREAMS) { ++ goto err_stream; ++ } + if (p->stream) { + QTAILQ_FOREACH(st, &uas->results, next) { + if (st->stream == p->stream) { +@@ -857,6 +860,9 @@ static void usb_uas_handle_data(USBDevice *dev, USBPacket *p) + break; + case UAS_PIPE_ID_DATA_IN: + case UAS_PIPE_ID_DATA_OUT: ++ if (p->stream > UAS_MAX_STREAMS) { ++ goto err_stream; ++ } + if (p->stream) { + req = usb_uas_find_request(uas, p->stream); + } else { +@@ -892,6 +898,11 @@ static void usb_uas_handle_data(USBDevice *dev, USBPacket *p) + p->status = USB_RET_STALL; + break; + } ++ ++err_stream: ++ error_report("%s: invalid stream %d", __func__, p->stream); ++ p->status = USB_RET_STALL; ++ return; + } + + static void usb_uas_unrealize(USBDevice *dev, Error **errp) |