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authorSona Sarmadi <sona.sarmadi@enea.com>2017-08-29 10:29:29 +0200
committerAdrian Dudau <adrian.dudau@enea.com>2017-08-29 13:32:30 +0200
commit534a1c7f012e2099ce83bcab35c25cd587c9f3af (patch)
treee3a7ba782deced84ceb7e8be02c602aab49ca120 /recipes-devtools
parent4c3b48e94915ea1e62f5364fe4261359cf99a8e7 (diff)
downloadmeta-nfv-access-common-534a1c7f012e2099ce83bcab35c25cd587c9f3af.tar.gz
qemu: CVE-2017-6505
Quick Emulator built with the USB OHCI Emulation support is vulnerable to an infinite loop issue. It could occur while processing an endpoint list descriptor in ohci_service_ed_list(). A guest user/process could use this flaw to crash Qemu process resulting in DoS. References: ========== https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-6505 Upstream patch: http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=95ed56939eb2eaa4e2f349fe6dcd13ca4edfd8fb Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com> Signed-off-by: Adrian Dudau <adrian.dudau@enea.com>
Diffstat (limited to 'recipes-devtools')
-rw-r--r--recipes-devtools/qemu/qemu/CVE-2017-6505.patch56
-rw-r--r--recipes-devtools/qemu/qemu_%.bbappend1
2 files changed, 57 insertions, 0 deletions
diff --git a/recipes-devtools/qemu/qemu/CVE-2017-6505.patch b/recipes-devtools/qemu/qemu/CVE-2017-6505.patch
new file mode 100644
index 0000000..a939e85
--- /dev/null
+++ b/recipes-devtools/qemu/qemu/CVE-2017-6505.patch
@@ -0,0 +1,56 @@
1From 95ed56939eb2eaa4e2f349fe6dcd13ca4edfd8fb Mon Sep 17 00:00:00 2001
2From: Li Qiang <liqiang6-s@360.cn>
3Date: Tue, 7 Feb 2017 02:23:33 -0800
4Subject: [PATCH] usb: ohci: limit the number of link eds
5
6The guest may builds an infinite loop with link eds. This patch
7limit the number of linked ed to avoid this.
8
9CVE: CVE-2017-6505
10Upstream-Status: Backport [backport from v2.9.0-rc0~85^2~8]
11
12Signed-off-by: Li Qiang <liqiang6-s@360.cn>
13Message-id: 5899a02e.45ca240a.6c373.93c1@mx.google.com
14Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
15Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
16---
17 hw/usb/hcd-ohci.c | 9 ++++++++-
18 1 file changed, 8 insertions(+), 1 deletion(-)
19
20diff --git a/hw/usb/hcd-ohci.c b/hw/usb/hcd-ohci.c
21index 2cba3e3..21c93e0 100644
22--- a/hw/usb/hcd-ohci.c
23+++ b/hw/usb/hcd-ohci.c
24@@ -42,6 +42,8 @@
25
26 #define OHCI_MAX_PORTS 15
27
28+#define ED_LINK_LIMIT 4
29+
30 static int64_t usb_frame_time;
31 static int64_t usb_bit_time;
32
33@@ -1184,7 +1186,7 @@ static int ohci_service_ed_list(OHCIState *ohci, uint32_t head, int completion)
34 uint32_t next_ed;
35 uint32_t cur;
36 int active;
37-
38+ uint32_t link_cnt = 0;
39 active = 0;
40
41 if (head == 0)
42@@ -1199,6 +1201,11 @@ static int ohci_service_ed_list(OHCIState *ohci, uint32_t head, int completion)
43
44 next_ed = ed.next & OHCI_DPTR_MASK;
45
46+ if (++link_cnt > ED_LINK_LIMIT) {
47+ ohci_die(ohci);
48+ return 0;
49+ }
50+
51 if ((ed.head & OHCI_ED_H) || (ed.flags & OHCI_ED_K)) {
52 uint32_t addr;
53 /* Cancel pending packets for ED that have been paused. */
54--
551.9.1
56
diff --git a/recipes-devtools/qemu/qemu_%.bbappend b/recipes-devtools/qemu/qemu_%.bbappend
index 8a73d1f..8db32c5 100644
--- a/recipes-devtools/qemu/qemu_%.bbappend
+++ b/recipes-devtools/qemu/qemu_%.bbappend
@@ -4,4 +4,5 @@ FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
4SRC_URI += "file://0001-CVE-2017-2620.patch \ 4SRC_URI += "file://0001-CVE-2017-2620.patch \
5 file://0002-CVE-2017-2620.patch \ 5 file://0002-CVE-2017-2620.patch \
6 file://CVE-2017-7471.patch \ 6 file://CVE-2017-7471.patch \
7 file://CVE-2017-6505.patch \
7 " 8 "