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[Bug 1188351] Re: CVE-2013-2140

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: John Johansen <john.johansen@xxxxxxxxxxxxx>
Date: Fri, 04 Oct 2013 08:42:08 -0000
Reply-to: Bug 1188351 <1188351@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Description changed:

- The bug is that if a system admin provides a disk (which supports the
- discard aka TRIM or SCSI UNMAP) to a guest as read-only - there are no
- checks done. Which means that the OS can destroy the data.
+ The dispatch_discard_io function in drivers/block/xen-blkback/blkback.c
+ in the Xen blkback implementation in the Linux kernel before 3.10.5
+ allows guest OS users to cause a denial of service (data loss) via
+ filesystem write operations on a read-only disk that supports the (1)
+ BLKIF_OP_DISCARD (aka discard or TRIM) or (2) SCSI UNMAP feature.
  
  Break-Fix: b3cb0d6adc4bbc70b5e37e49a6068e973545ead7
  604c499cbbcc3d5fe5fb8d53306aa0fae1990109

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https://bugs.launchpad.net/bugs/1188351

Title:
  CVE-2013-2140

Status in “linux” package in Ubuntu:
  Invalid
Status in “linux-armadaxp” package in Ubuntu:
  Invalid
Status in “linux-ec2” package in Ubuntu:
  Invalid
Status in “linux-fsl-imx51” package in Ubuntu:
  Invalid
Status in “linux-lts-backport-maverick” package in Ubuntu:
  Invalid
Status in “linux-lts-backport-natty” package in Ubuntu:
  Invalid
Status in “linux-lts-backport-oneiric” package in Ubuntu:
  Invalid
Status in “linux-lts-quantal” package in Ubuntu:
  Invalid
Status in “linux-lts-raring” package in Ubuntu:
  Invalid
Status in “linux-mvl-dove” package in Ubuntu:
  Invalid
Status in “linux-ti-omap4” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Lucid:
  Invalid
Status in “linux-armadaxp” source package in Lucid:
  Invalid
Status in “linux-ec2” source package in Lucid:
  Invalid
Status in “linux-fsl-imx51” source package in Lucid:
  Invalid
Status in “linux-lts-backport-maverick” source package in Lucid:
  Invalid
Status in “linux-lts-backport-natty” source package in Lucid:
  Invalid
Status in “linux-lts-backport-oneiric” source package in Lucid:
  Invalid
Status in “linux-lts-quantal” source package in Lucid:
  Invalid
Status in “linux-lts-raring” source package in Lucid:
  Invalid
Status in “linux-mvl-dove” source package in Lucid:
  Invalid
Status in “linux-ti-omap4” source package in Lucid:
  Invalid
Status in “linux” source package in Precise:
  New
Status in “linux-armadaxp” source package in Precise:
  New
Status in “linux-ec2” source package in Precise:
  Invalid
Status in “linux-fsl-imx51” source package in Precise:
  Invalid
Status in “linux-lts-backport-maverick” source package in Precise:
  Invalid
Status in “linux-lts-backport-natty” source package in Precise:
  Invalid
Status in “linux-lts-backport-oneiric” source package in Precise:
  Invalid
Status in “linux-lts-quantal” source package in Precise:
  Fix Released
Status in “linux-lts-raring” source package in Precise:
  Fix Released
Status in “linux-mvl-dove” source package in Precise:
  Invalid
Status in “linux-ti-omap4” source package in Precise:
  New
Status in “linux” source package in Quantal:
  Fix Released
Status in “linux-armadaxp” source package in Quantal:
  Fix Released
Status in “linux-ec2” source package in Quantal:
  Invalid
Status in “linux-fsl-imx51” source package in Quantal:
  Invalid
Status in “linux-lts-backport-maverick” source package in Quantal:
  Invalid
Status in “linux-lts-backport-natty” source package in Quantal:
  Invalid
Status in “linux-lts-backport-oneiric” source package in Quantal:
  Invalid
Status in “linux-lts-quantal” source package in Quantal:
  Invalid
Status in “linux-lts-raring” source package in Quantal:
  Invalid
Status in “linux-mvl-dove” source package in Quantal:
  Invalid
Status in “linux-ti-omap4” source package in Quantal:
  Fix Released
Status in “linux” source package in Raring:
  Fix Released
Status in “linux-armadaxp” source package in Raring:
  Invalid
Status in “linux-ec2” source package in Raring:
  Invalid
Status in “linux-fsl-imx51” source package in Raring:
  Invalid
Status in “linux-lts-backport-maverick” source package in Raring:
  Invalid
Status in “linux-lts-backport-natty” source package in Raring:
  Invalid
Status in “linux-lts-backport-oneiric” source package in Raring:
  Invalid
Status in “linux-lts-quantal” source package in Raring:
  Invalid
Status in “linux-lts-raring” source package in Raring:
  Invalid
Status in “linux-mvl-dove” source package in Raring:
  Invalid
Status in “linux-ti-omap4” source package in Raring:
  Fix Released
Status in “linux” source package in Saucy:
  Invalid
Status in “linux-armadaxp” source package in Saucy:
  Invalid
Status in “linux-ec2” source package in Saucy:
  Invalid
Status in “linux-fsl-imx51” source package in Saucy:
  Invalid
Status in “linux-lts-backport-maverick” source package in Saucy:
  Invalid
Status in “linux-lts-backport-natty” source package in Saucy:
  Invalid
Status in “linux-lts-backport-oneiric” source package in Saucy:
  Invalid
Status in “linux-lts-quantal” source package in Saucy:
  Invalid
Status in “linux-lts-raring” source package in Saucy:
  Invalid
Status in “linux-mvl-dove” source package in Saucy:
  Invalid
Status in “linux-ti-omap4” source package in Saucy:
  Fix Committed

Bug description:
  The dispatch_discard_io function in drivers/block/xen-
  blkback/blkback.c in the Xen blkback implementation in the Linux
  kernel before 3.10.5 allows guest OS users to cause a denial of
  service (data loss) via filesystem write operations on a read-only
  disk that supports the (1) BLKIF_OP_DISCARD (aka discard or TRIM) or
  (2) SCSI UNMAP feature.

  Break-Fix: b3cb0d6adc4bbc70b5e37e49a6068e973545ead7
  604c499cbbcc3d5fe5fb8d53306aa0fae1990109

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