[packages/qemu] add fix for CVE-2015-3456.patch from upstream git
glen
glen at pld-linux.org
Fri May 22 12:27:02 CEST 2015
commit f0aafe84214e09167e14e2e2d0b5a2bfb9326bee
Author: Elan Ruusamäe <glen at delfi.ee>
Date: Fri May 22 11:27:26 2015 +0300
add fix for CVE-2015-3456.patch from upstream git
CVE-2015-3456.patch | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++
qemu.spec | 2 ++
2 files changed, 86 insertions(+)
---
diff --git a/qemu.spec b/qemu.spec
index 20aaa10..38f4add 100644
--- a/qemu.spec
+++ b/qemu.spec
@@ -63,6 +63,7 @@ Patch3: %{name}-system-libcacard.patch
Patch4: %{name}-xattr.patch
Patch5: libjpeg-boolean.patch
Patch6: x32.patch
+Patch7: CVE-2015-3456.patch
# Proof of concept, for reference, do not remove
Patch400: %{name}-kde_virtual_workspaces_hack.patch
URL: http://www.qemu-project.org/
@@ -736,6 +737,7 @@ Moduł QEMU dla urządeń blokowych typu 'ssh'.
%patch4 -p1
%patch5 -p1
%patch6 -p1
+%patch7 -p1
%{__mv} libcacard libcacard-use-system-lib
diff --git a/CVE-2015-3456.patch b/CVE-2015-3456.patch
new file mode 100644
index 0000000..50c19d9
--- /dev/null
+++ b/CVE-2015-3456.patch
@@ -0,0 +1,84 @@
+From e907746266721f305d67bc0718795fedee2e824c Mon Sep 17 00:00:00 2001
+From: Petr Matousek <pmatouse at redhat.com>
+Date: Wed, 6 May 2015 09:48:59 +0200
+Subject: [PATCH] fdc: force the fifo access to be in bounds of the allocated buffer
+
+During processing of certain commands such as FD_CMD_READ_ID and
+FD_CMD_DRIVE_SPECIFICATION_COMMAND the fifo memory access could
+get out of bounds leading to memory corruption with values coming
+from the guest.
+
+Fix this by making sure that the index is always bounded by the
+allocated memory.
+
+This is CVE-2015-3456.
+
+Signed-off-by: Petr Matousek <pmatouse at redhat.com>
+Reviewed-by: John Snow <jsnow at redhat.com>
+Signed-off-by: John Snow <jsnow at redhat.com>
+---
+ hw/block/fdc.c | 17 +++++++++++------
+ 1 files changed, 11 insertions(+), 6 deletions(-)
+
+diff --git a/hw/block/fdc.c b/hw/block/fdc.c
+index f72a392..d8a8edd 100644
+--- a/hw/block/fdc.c
++++ b/hw/block/fdc.c
+@@ -1497,7 +1497,7 @@ static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
+ {
+ FDrive *cur_drv;
+ uint32_t retval = 0;
+- int pos;
++ uint32_t pos;
+
+ cur_drv = get_cur_drv(fdctrl);
+ fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+@@ -1506,8 +1506,8 @@ static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
+ return 0;
+ }
+ pos = fdctrl->data_pos;
++ pos %= FD_SECTOR_LEN;
+ if (fdctrl->msr & FD_MSR_NONDMA) {
+- pos %= FD_SECTOR_LEN;
+ if (pos == 0) {
+ if (fdctrl->data_pos != 0)
+ if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
+@@ -1852,10 +1852,13 @@ static void fdctrl_handle_option(FDCtrl *fdctrl, int direction)
+ static void fdctrl_handle_drive_specification_command(FDCtrl *fdctrl, int direction)
+ {
+ FDrive *cur_drv = get_cur_drv(fdctrl);
++ uint32_t pos;
+
+- if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) {
++ pos = fdctrl->data_pos - 1;
++ pos %= FD_SECTOR_LEN;
++ if (fdctrl->fifo[pos] & 0x80) {
+ /* Command parameters done */
+- if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
++ if (fdctrl->fifo[pos] & 0x40) {
+ fdctrl->fifo[0] = fdctrl->fifo[1];
+ fdctrl->fifo[2] = 0;
+ fdctrl->fifo[3] = 0;
+@@ -1955,7 +1958,7 @@ static uint8_t command_to_handler[256];
+ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
+ {
+ FDrive *cur_drv;
+- int pos;
++ uint32_t pos;
+
+ /* Reset mode */
+ if (!(fdctrl->dor & FD_DOR_nRESET)) {
+@@ -2004,7 +2007,9 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
+ }
+
+ FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
+- fdctrl->fifo[fdctrl->data_pos++] = value;
++ pos = fdctrl->data_pos++;
++ pos %= FD_SECTOR_LEN;
++ fdctrl->fifo[pos] = value;
+ if (fdctrl->data_pos == fdctrl->data_len) {
+ /* We now have all parameters
+ * and will be able to treat the command
+--
+1.7.0.4
+
================================================================
---- gitweb:
http://git.pld-linux.org/gitweb.cgi/packages/qemu.git/commitdiff/f0aafe84214e09167e14e2e2d0b5a2bfb9326bee
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