2014-05-06 18:32:36 |
John Johansen |
bug |
|
|
added bug |
2014-05-06 18:32:39 |
John Johansen |
tags |
|
kernel-cve-tracking-bug |
|
2014-05-06 18:32:40 |
John Johansen |
information type |
Public |
Public Security |
|
2014-05-06 18:32:41 |
John Johansen |
cve linked |
|
2014-1737 |
|
2014-05-06 18:32:52 |
John Johansen |
nominated for series |
|
Ubuntu Utopic |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux (Ubuntu Utopic) |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux-fsl-imx51 (Ubuntu Utopic) |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux-mvl-dove (Ubuntu Utopic) |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux-ec2 (Ubuntu Utopic) |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux-ti-omap4 (Ubuntu Utopic) |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Utopic) |
|
2014-05-06 18:32:54 |
John Johansen |
bug task added |
|
linux-lts-backport-natty (Ubuntu Utopic) |
|
2014-05-06 18:32:56 |
John Johansen |
nominated for series |
|
Ubuntu Trusty |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux (Ubuntu Trusty) |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux-fsl-imx51 (Ubuntu Trusty) |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux-mvl-dove (Ubuntu Trusty) |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux-ec2 (Ubuntu Trusty) |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux-ti-omap4 (Ubuntu Trusty) |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Trusty) |
|
2014-05-06 18:32:57 |
John Johansen |
bug task added |
|
linux-lts-backport-natty (Ubuntu Trusty) |
|
2014-05-06 18:33:00 |
John Johansen |
nominated for series |
|
Ubuntu Saucy |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux (Ubuntu Saucy) |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux-fsl-imx51 (Ubuntu Saucy) |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux-mvl-dove (Ubuntu Saucy) |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux-ec2 (Ubuntu Saucy) |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux-ti-omap4 (Ubuntu Saucy) |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Saucy) |
|
2014-05-06 18:33:02 |
John Johansen |
bug task added |
|
linux-lts-backport-natty (Ubuntu Saucy) |
|
2014-05-06 18:33:04 |
John Johansen |
nominated for series |
|
Ubuntu Quantal |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux (Ubuntu Quantal) |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux-fsl-imx51 (Ubuntu Quantal) |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux-mvl-dove (Ubuntu Quantal) |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux-ec2 (Ubuntu Quantal) |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux-ti-omap4 (Ubuntu Quantal) |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Quantal) |
|
2014-05-06 18:33:06 |
John Johansen |
bug task added |
|
linux-lts-backport-natty (Ubuntu Quantal) |
|
2014-05-06 18:33:08 |
John Johansen |
nominated for series |
|
Ubuntu Precise |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux (Ubuntu Precise) |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux-fsl-imx51 (Ubuntu Precise) |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux-mvl-dove (Ubuntu Precise) |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux-ec2 (Ubuntu Precise) |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux-ti-omap4 (Ubuntu Precise) |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Precise) |
|
2014-05-06 18:33:10 |
John Johansen |
bug task added |
|
linux-lts-backport-natty (Ubuntu Precise) |
|
2014-05-06 18:33:12 |
John Johansen |
nominated for series |
|
Ubuntu Lucid |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux (Ubuntu Lucid) |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux-fsl-imx51 (Ubuntu Lucid) |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux-mvl-dove (Ubuntu Lucid) |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux-ec2 (Ubuntu Lucid) |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux-ti-omap4 (Ubuntu Lucid) |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Lucid) |
|
2014-05-06 18:33:14 |
John Johansen |
bug task added |
|
linux-lts-backport-natty (Ubuntu Lucid) |
|
2014-05-06 18:33:29 |
John Johansen |
linux-armadaxp (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:33:32 |
John Johansen |
linux-armadaxp (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:33:35 |
John Johansen |
linux-armadaxp (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:33:38 |
John Johansen |
linux-armadaxp (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:33:41 |
John Johansen |
linux-ec2 (Ubuntu Precise): status |
New |
Invalid |
|
2014-05-06 18:33:44 |
John Johansen |
linux-ec2 (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:33:47 |
John Johansen |
linux-ec2 (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:33:50 |
John Johansen |
linux-ec2 (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:33:53 |
John Johansen |
linux-ec2 (Ubuntu Quantal): status |
New |
Invalid |
|
2014-05-06 18:33:56 |
John Johansen |
linux-lts-quantal (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:33:59 |
John Johansen |
linux-lts-quantal (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:34:03 |
John Johansen |
linux-lts-quantal (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:34:08 |
John Johansen |
linux-lts-quantal (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:34:11 |
John Johansen |
linux-lts-quantal (Ubuntu Quantal): status |
New |
Invalid |
|
2014-05-06 18:34:15 |
John Johansen |
linux-mvl-dove (Ubuntu Precise): status |
New |
Invalid |
|
2014-05-06 18:34:19 |
John Johansen |
linux-mvl-dove (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:34:23 |
John Johansen |
linux-mvl-dove (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:34:26 |
John Johansen |
linux-mvl-dove (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:34:29 |
John Johansen |
linux-mvl-dove (Ubuntu Quantal): status |
New |
Invalid |
|
2014-05-06 18:34:33 |
John Johansen |
linux-lts-saucy (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:34:36 |
John Johansen |
linux-lts-saucy (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:34:39 |
John Johansen |
linux-lts-saucy (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:34:43 |
John Johansen |
linux-lts-saucy (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:34:46 |
John Johansen |
linux-lts-saucy (Ubuntu Quantal): status |
New |
Invalid |
|
2014-05-06 18:34:50 |
John Johansen |
linux-ti-omap4 (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:34:54 |
John Johansen |
linux-ti-omap4 (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:34:57 |
John Johansen |
linux-ti-omap4 (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:35:01 |
John Johansen |
linux-fsl-imx51 (Ubuntu Precise): status |
New |
Invalid |
|
2014-05-06 18:35:05 |
John Johansen |
linux-fsl-imx51 (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:35:08 |
John Johansen |
linux-fsl-imx51 (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:35:11 |
John Johansen |
linux-fsl-imx51 (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:35:16 |
John Johansen |
linux-fsl-imx51 (Ubuntu Quantal): status |
New |
Invalid |
|
2014-05-06 18:35:25 |
John Johansen |
linux-lts-raring (Ubuntu Saucy): status |
New |
Invalid |
|
2014-05-06 18:35:29 |
John Johansen |
linux-lts-raring (Ubuntu Trusty): status |
New |
Invalid |
|
2014-05-06 18:35:32 |
John Johansen |
linux-lts-raring (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:35:37 |
John Johansen |
linux-lts-raring (Ubuntu Utopic): status |
New |
Invalid |
|
2014-05-06 18:35:40 |
John Johansen |
linux-lts-raring (Ubuntu Quantal): status |
New |
Invalid |
|
2014-05-06 18:35:43 |
John Johansen |
description |
Placeholder |
The first issue lies in the driver's processing of FDRAWCMD ioctls, specifically in its handling of copying floppy_raw_cmd ioctl argument structures from and to userspace. There are four relevant functions in drivers/block/floppy.c: raw_cmd_{ioctl,copyin,copyout,free}. First, raw_cmd_ioctl calls raw_cmd_copyin. This function kmallocs space for a floppy_raw_cmd structure and stores the resulting allocation in the "rcmd" pointer argument. It then attempts to copy_from_user the structure from userspace. If this fails, an early EFAULT return is taken. The problem is that even if the early return is taken, the pointer to the non-/partially-initialized floppy_raw_cmd structure has already been returned via the "rcmd" pointer. Back out in raw_cmd_ioctl, it attempts to raw_cmd_free this pointer. raw_cmd_free attempts to free any DMA pages allocated for the raw command, kfrees the raw command structure itself, and follows the linked list, if any, of further raw commands (a user can specify the FD_RAW_MORE flag to signal that there are more raw commands to follow in a single FDRAWCMD ioctl). So, a malicious user can send a FDRAWCMD ioctl with a raw command argument structure that has some bytes inaccessible (ie. off the end of an allocated page). The copy_from_user will fail but raw_cmd_free will attempt to process the floppy_raw_cmd as if it had been fully initialized by the rest of raw_cmd_copyin. The user can control the arguments passed to fd_dma_mem_free and kfree (by making use of the linked-list feature and specifying the target address as a next-in-list structure).
Break-Fix: - ef87dbe7614341c2e7bfe8d32fcb7028cc97442c |
|
2014-05-06 18:35:45 |
John Johansen |
linux-armadaxp (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:35:48 |
John Johansen |
linux-armadaxp (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:35:50 |
John Johansen |
linux-armadaxp (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:35:53 |
John Johansen |
linux-armadaxp (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:35:56 |
John Johansen |
linux-armadaxp (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:35:59 |
John Johansen |
linux-armadaxp (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:36:02 |
John Johansen |
linux-ec2 (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:36:05 |
John Johansen |
linux-ec2 (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:36:07 |
John Johansen |
linux-ec2 (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:36:09 |
John Johansen |
linux-ec2 (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:36:12 |
John Johansen |
linux-ec2 (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:36:15 |
John Johansen |
linux-ec2 (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:36:18 |
John Johansen |
linux-lts-quantal (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:36:20 |
John Johansen |
linux-lts-quantal (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:36:23 |
John Johansen |
linux-lts-quantal (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:36:26 |
John Johansen |
linux-lts-quantal (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:36:29 |
John Johansen |
linux-lts-quantal (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:36:31 |
John Johansen |
linux-lts-quantal (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:36:34 |
John Johansen |
linux-mvl-dove (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:36:36 |
John Johansen |
linux-mvl-dove (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:36:40 |
John Johansen |
linux-mvl-dove (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:36:43 |
John Johansen |
linux-mvl-dove (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:36:47 |
John Johansen |
linux-mvl-dove (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:36:50 |
John Johansen |
linux-mvl-dove (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:36:54 |
John Johansen |
linux-mvl-dove (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:36:57 |
John Johansen |
linux-lts-saucy (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:36:59 |
John Johansen |
linux-lts-saucy (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:37:01 |
John Johansen |
linux-lts-saucy (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:37:04 |
John Johansen |
linux-lts-saucy (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:37:07 |
John Johansen |
linux-lts-saucy (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:37:10 |
John Johansen |
linux-lts-saucy (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:37:13 |
John Johansen |
linux (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:37:16 |
John Johansen |
linux (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:37:19 |
John Johansen |
linux (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:37:21 |
John Johansen |
linux (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:37:24 |
John Johansen |
linux (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:37:26 |
John Johansen |
linux (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:37:30 |
John Johansen |
linux-ti-omap4 (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:37:33 |
John Johansen |
linux-ti-omap4 (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:37:36 |
John Johansen |
linux-ti-omap4 (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:37:39 |
John Johansen |
linux-ti-omap4 (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:37:41 |
John Johansen |
linux-ti-omap4 (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:37:43 |
John Johansen |
linux-ti-omap4 (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:37:45 |
John Johansen |
linux-fsl-imx51 (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:37:48 |
John Johansen |
linux-fsl-imx51 (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:37:50 |
John Johansen |
linux-fsl-imx51 (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:37:53 |
John Johansen |
linux-fsl-imx51 (Ubuntu Lucid): status |
New |
Invalid |
|
2014-05-06 18:37:56 |
John Johansen |
linux-fsl-imx51 (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:37:58 |
John Johansen |
linux-fsl-imx51 (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:38:01 |
John Johansen |
linux-fsl-imx51 (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-06 18:38:04 |
John Johansen |
linux-lts-raring (Ubuntu Precise): importance |
Undecided |
High |
|
2014-05-06 18:38:07 |
John Johansen |
linux-lts-raring (Ubuntu Saucy): importance |
Undecided |
High |
|
2014-05-06 18:38:10 |
John Johansen |
linux-lts-raring (Ubuntu Trusty): importance |
Undecided |
High |
|
2014-05-06 18:38:14 |
John Johansen |
linux-lts-raring (Ubuntu Lucid): importance |
Undecided |
High |
|
2014-05-06 18:38:17 |
John Johansen |
linux-lts-raring (Ubuntu Utopic): importance |
Undecided |
High |
|
2014-05-06 18:38:20 |
John Johansen |
linux-lts-raring (Ubuntu Quantal): importance |
Undecided |
High |
|
2014-05-09 18:05:10 |
John Johansen |
linux-armadaxp (Ubuntu Precise): status |
New |
Fix Committed |
|
2014-05-09 18:05:13 |
John Johansen |
linux-armadaxp (Ubuntu Quantal): status |
New |
Fix Committed |
|
2014-05-09 18:05:17 |
John Johansen |
linux-ec2 (Ubuntu Lucid): status |
New |
Fix Committed |
|
2014-05-09 18:05:22 |
John Johansen |
linux-lts-quantal (Ubuntu Precise): status |
New |
Fix Committed |
|
2014-05-09 18:05:26 |
John Johansen |
linux-lts-saucy (Ubuntu Precise): status |
New |
Fix Committed |
|
2014-05-09 18:05:30 |
John Johansen |
linux (Ubuntu Precise): status |
New |
Fix Committed |
|
2014-05-09 18:05:33 |
John Johansen |
linux (Ubuntu Saucy): status |
New |
Fix Committed |
|
2014-05-09 18:05:38 |
John Johansen |
linux (Ubuntu Trusty): status |
New |
Fix Committed |
|
2014-05-09 18:05:41 |
John Johansen |
linux (Ubuntu Lucid): status |
New |
Fix Committed |
|
2014-05-09 18:05:45 |
John Johansen |
linux (Ubuntu Quantal): status |
New |
Fix Committed |
|
2014-05-09 18:05:48 |
John Johansen |
linux-ti-omap4 (Ubuntu Precise): status |
New |
Fix Committed |
|
2014-05-09 18:05:52 |
John Johansen |
linux-ti-omap4 (Ubuntu Saucy): status |
New |
Fix Committed |
|
2014-05-09 18:05:55 |
John Johansen |
linux-ti-omap4 (Ubuntu Quantal): status |
New |
Fix Committed |
|
2014-05-09 18:05:58 |
John Johansen |
linux-lts-raring (Ubuntu Precise): status |
New |
Fix Committed |
|
2014-05-12 23:31:49 |
Launchpad Janitor |
branch linked |
|
lp:ubuntu/precise-proposed/linux-lts-trusty |
|
2014-05-20 18:56:14 |
John Johansen |
bug task deleted |
linux-armadaxp (Ubuntu Quantal) |
|
|
2014-05-20 18:56:16 |
John Johansen |
bug task deleted |
linux-ec2 (Ubuntu Quantal) |
|
|
2014-05-20 18:56:17 |
John Johansen |
bug task deleted |
linux-lts-saucy (Ubuntu Quantal) |
|
|
2014-05-20 18:56:19 |
John Johansen |
bug task deleted |
linux-lts-quantal (Ubuntu Quantal) |
|
|
2014-05-20 18:56:20 |
John Johansen |
bug task deleted |
linux-mvl-dove (Ubuntu Quantal) |
|
|
2014-05-20 18:56:22 |
John Johansen |
bug task deleted |
linux (Ubuntu Quantal) |
|
|
2014-05-20 18:56:23 |
John Johansen |
bug task deleted |
linux-fsl-imx51 (Ubuntu Quantal) |
|
|
2014-05-20 18:56:25 |
John Johansen |
bug task deleted |
linux-ti-omap4 (Ubuntu Quantal) |
|
|
2014-05-20 18:56:26 |
John Johansen |
bug task deleted |
linux-lts-raring (Ubuntu Quantal) |
|
|
2014-05-20 18:56:35 |
John Johansen |
linux (Ubuntu Utopic): status |
New |
Fix Committed |
|
2014-05-20 18:56:37 |
John Johansen |
description |
The first issue lies in the driver's processing of FDRAWCMD ioctls, specifically in its handling of copying floppy_raw_cmd ioctl argument structures from and to userspace. There are four relevant functions in drivers/block/floppy.c: raw_cmd_{ioctl,copyin,copyout,free}. First, raw_cmd_ioctl calls raw_cmd_copyin. This function kmallocs space for a floppy_raw_cmd structure and stores the resulting allocation in the "rcmd" pointer argument. It then attempts to copy_from_user the structure from userspace. If this fails, an early EFAULT return is taken. The problem is that even if the early return is taken, the pointer to the non-/partially-initialized floppy_raw_cmd structure has already been returned via the "rcmd" pointer. Back out in raw_cmd_ioctl, it attempts to raw_cmd_free this pointer. raw_cmd_free attempts to free any DMA pages allocated for the raw command, kfrees the raw command structure itself, and follows the linked list, if any, of further raw commands (a user can specify the FD_RAW_MORE flag to signal that there are more raw commands to follow in a single FDRAWCMD ioctl). So, a malicious user can send a FDRAWCMD ioctl with a raw command argument structure that has some bytes inaccessible (ie. off the end of an allocated page). The copy_from_user will fail but raw_cmd_free will attempt to process the floppy_raw_cmd as if it had been fully initialized by the rest of raw_cmd_copyin. The user can control the arguments passed to fd_dma_mem_free and kfree (by making use of the linked-list feature and specifying the target address as a next-in-list structure).
Break-Fix: - ef87dbe7614341c2e7bfe8d32fcb7028cc97442c |
The raw_cmd_copyin function in drivers/block/floppy.c in the Linux kernel through 3.14.3 does not properly handle error conditions during processing of an FDRAWCMD ioctl call, which allows local users to trigger kfree operations and gain privileges by leveraging write access to a /dev/fd device. First, raw_cmd_ioctl calls raw_cmd_copyin. This function kmallocs space for a floppy_raw_cmd structure and stores the resulting allocation in the "rcmd" pointer argument. It then attempts to copy_from_user the structure from userspace. If this fails, an early EFAULT return is taken. The problem is that even if the early return is taken, the pointer to the non-/partially-initialized floppy_raw_cmd structure has already been returned via the "rcmd" pointer. Back out in raw_cmd_ioctl, it attempts to raw_cmd_free this pointer. raw_cmd_free attempts to free any DMA pages allocated for the raw command, kfrees the raw command structure itself, and follows the linked list, if any, of further raw commands (a user can specify the FD_RAW_MORE flag to signal that there are more raw commands to follow in a single FDRAWCMD ioctl). So, a malicious user can send a FDRAWCMD ioctl with a raw command argument structure that has some bytes inaccessible (ie. off the end of an allocated page). The copy_from_user will fail but raw_cmd_free will attempt to process the floppy_raw_cmd as if it had been fully initialized by the rest of raw_cmd_copyin. The user can control the arguments passed to fd_dma_mem_free and kfree (by making use of the linked-list feature and specifying the target address as a next-in-list structure).
Break-Fix: - ef87dbe7614341c2e7bfe8d32fcb7028cc97442c |
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2014-05-26 06:44:30 |
Launchpad Janitor |
linux (Ubuntu Lucid): status |
Fix Committed |
Fix Released |
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2014-05-26 06:44:30 |
Launchpad Janitor |
cve linked |
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2013-7339 |
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2014-05-26 06:44:30 |
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cve linked |
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2014-0196 |
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2014-05-26 06:44:30 |
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2014-1738 |
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2014-05-26 06:44:30 |
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cve linked |
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2014-2678 |
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2014-05-26 06:45:53 |
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linux-ec2 (Ubuntu Lucid): status |
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2014-05-26 08:07:51 |
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linux (Ubuntu Precise): status |
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2014-05-26 08:07:51 |
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2014-0077 |
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2014-05-26 08:07:51 |
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2014-2309 |
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2014-05-26 08:07:51 |
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2014-2851 |
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2014-05-26 08:08:54 |
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2014-05-26 15:01:13 |
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2014-05-26 15:01:13 |
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2014-05-26 15:01:00 |
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2014-05-26 15:01:00 |
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2014-2523 |
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2014-05-26 15:05:20 |
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2014-05-26 15:30:43 |
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2014-06-03 17:56:13 |
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2014-06-26 23:39:35 |
Jamie Strandboge |
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2014-07-23 22:16:05 |
John Johansen |
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2014-10-27 10:39:35 |
John Johansen |
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2014-10-27 10:42:32 |
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2014-12-08 10:13:09 |
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2015-05-04 22:53:49 |
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|
2015-07-28 11:28:33 |
John Johansen |
bug task deleted |
linux-armadaxp (Ubuntu Utopic) |
|
|
2015-07-28 11:28:34 |
John Johansen |
bug task deleted |
linux-ec2 (Ubuntu Utopic) |
|
|
2015-07-28 11:28:36 |
John Johansen |
bug task deleted |
linux-goldfish (Ubuntu Utopic) |
|
|
2015-07-28 11:28:37 |
John Johansen |
bug task deleted |
linux-lts-saucy (Ubuntu Utopic) |
|
|
2015-07-28 11:28:38 |
John Johansen |
bug task deleted |
linux-lts-quantal (Ubuntu Utopic) |
|
|
2015-07-28 11:28:40 |
John Johansen |
bug task deleted |
linux-mvl-dove (Ubuntu Utopic) |
|
|
2015-07-28 11:28:41 |
John Johansen |
bug task deleted |
linux-ti-omap4 (Ubuntu Utopic) |
|
|
2015-07-28 11:28:42 |
John Johansen |
bug task deleted |
linux-lts-vivid (Ubuntu Utopic) |
|
|
2015-07-28 11:28:45 |
John Johansen |
bug task deleted |
linux (Ubuntu Utopic) |
|
|
2015-07-28 11:28:46 |
John Johansen |
bug task deleted |
linux-mako (Ubuntu Utopic) |
|
|
2015-07-28 11:28:48 |
John Johansen |
bug task deleted |
linux-fsl-imx51 (Ubuntu Utopic) |
|
|
2015-07-28 11:28:49 |
John Johansen |
bug task deleted |
linux-lts-utopic (Ubuntu Utopic) |
|
|
2015-07-28 11:28:51 |
John Johansen |
bug task deleted |
linux-flo (Ubuntu Utopic) |
|
|
2015-07-28 11:28:53 |
John Johansen |
bug task deleted |
linux-lts-raring (Ubuntu Utopic) |
|
|
2015-07-28 11:28:55 |
John Johansen |
bug task deleted |
linux-manta (Ubuntu Utopic) |
|
|
2015-11-10 21:33:11 |
Steve Beattie |
linux-lts-wily (Ubuntu Precise): status |
New |
Invalid |
|
2015-11-10 21:33:16 |
Steve Beattie |
linux-lts-wily (Ubuntu Precise): importance |
Undecided |
High |
|
2015-11-10 21:33:19 |
Steve Beattie |
linux-lts-wily (Ubuntu Wily): status |
New |
Invalid |
|
2015-11-10 21:33:22 |
Steve Beattie |
linux-lts-wily (Ubuntu Wily): importance |
Undecided |
High |
|
2015-11-10 21:33:25 |
Steve Beattie |
linux-lts-wily (Ubuntu Trusty): status |
New |
Invalid |
|
2015-11-10 21:33:29 |
Steve Beattie |
linux-lts-wily (Ubuntu Trusty): importance |
Undecided |
High |
|
2015-11-10 21:33:33 |
Steve Beattie |
linux-lts-wily (Ubuntu Vivid): status |
New |
Invalid |
|
2015-11-10 21:33:37 |
Steve Beattie |
linux-lts-wily (Ubuntu Vivid): importance |
Undecided |
High |
|
2015-11-16 17:45:46 |
Steve Beattie |
linux-raspi2 (Ubuntu Precise): status |
New |
Invalid |
|
2015-11-16 17:45:49 |
Steve Beattie |
linux-raspi2 (Ubuntu Precise): importance |
Undecided |
High |
|
2015-11-16 17:45:52 |
Steve Beattie |
linux-raspi2 (Ubuntu Wily): status |
New |
Invalid |
|
2015-11-16 17:45:55 |
Steve Beattie |
linux-raspi2 (Ubuntu Wily): importance |
Undecided |
High |
|
2015-11-16 17:45:58 |
Steve Beattie |
linux-raspi2 (Ubuntu Trusty): status |
New |
Invalid |
|
2015-11-16 17:46:02 |
Steve Beattie |
linux-raspi2 (Ubuntu Trusty): importance |
Undecided |
High |
|
2015-11-16 17:46:06 |
Steve Beattie |
linux-raspi2 (Ubuntu Vivid): status |
New |
Invalid |
|
2015-11-16 17:46:11 |
Steve Beattie |
linux-raspi2 (Ubuntu Vivid): importance |
Undecided |
High |
|
2015-12-03 12:46:59 |
Steve Beattie |
nominated for series |
|
Ubuntu Xenial |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-fsl-imx51 (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-mvl-dove (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-ec2 (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-ti-omap4 (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-backport-maverick (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-backport-natty (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-armadaxp (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-quantal (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-raring (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-saucy (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-mako (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-manta (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-goldfish (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-flo (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-trusty (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-utopic (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-vivid (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-lts-wily (Ubuntu Xenial) |
|
2015-12-03 12:47:01 |
Steve Beattie |
bug task added |
|
linux-raspi2 (Ubuntu Xenial) |
|
2015-12-03 12:47:09 |
Steve Beattie |
linux-lts-wily (Ubuntu Xenial): status |
New |
Invalid |
|
2015-12-03 12:47:12 |
Steve Beattie |
linux-lts-wily (Ubuntu Xenial): importance |
Undecided |
High |
|
2015-12-03 12:47:15 |
Steve Beattie |
linux-raspi2 (Ubuntu Xenial): status |
New |
Fix Committed |
|
2015-12-03 12:47:19 |
Steve Beattie |
linux-raspi2 (Ubuntu Xenial): importance |
Undecided |
High |
|
2016-02-10 22:50:21 |
Steve Beattie |
linux-lts-xenial (Ubuntu Precise): status |
New |
Invalid |
|
2016-02-10 22:50:27 |
Steve Beattie |
linux-lts-xenial (Ubuntu Precise): importance |
Undecided |
High |
|
2016-02-10 22:50:30 |
Steve Beattie |
linux-lts-xenial (Ubuntu Wily): status |
New |
Invalid |
|
2016-02-10 22:50:35 |
Steve Beattie |
linux-lts-xenial (Ubuntu Wily): importance |
Undecided |
High |
|
2016-02-10 22:50:38 |
Steve Beattie |
linux-lts-xenial (Ubuntu Xenial): status |
New |
Invalid |
|
2016-02-10 22:50:43 |
Steve Beattie |
linux-lts-xenial (Ubuntu Xenial): importance |
Undecided |
High |
|
2016-02-10 22:50:47 |
Steve Beattie |
linux-lts-xenial (Ubuntu Trusty): status |
New |
Fix Committed |
|
2016-02-10 22:50:51 |
Steve Beattie |
linux-lts-xenial (Ubuntu Trusty): importance |
Undecided |
High |
|
2016-05-05 22:15:56 |
Steve Beattie |
linux-snapdragon (Ubuntu Precise): status |
New |
Invalid |
|
2016-05-05 22:16:00 |
Steve Beattie |
linux-snapdragon (Ubuntu Precise): importance |
Undecided |
High |
|
2016-05-05 22:16:03 |
Steve Beattie |
linux-snapdragon (Ubuntu Wily): status |
New |
Invalid |
|
2016-05-05 22:16:07 |
Steve Beattie |
linux-snapdragon (Ubuntu Wily): importance |
Undecided |
High |
|
2016-05-05 22:16:10 |
Steve Beattie |
linux-snapdragon (Ubuntu Xenial): status |
New |
Invalid |
|
2016-05-05 22:16:15 |
Steve Beattie |
linux-snapdragon (Ubuntu Xenial): importance |
Undecided |
High |
|
2016-05-05 22:16:20 |
Steve Beattie |
linux-snapdragon (Ubuntu Trusty): status |
New |
Invalid |
|
2016-05-05 22:16:25 |
Steve Beattie |
linux-snapdragon (Ubuntu Trusty): importance |
Undecided |
High |
|