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[Bug 1271441] Re: CVE-2014-1438

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: John Johansen <john.johansen@xxxxxxxxxxxxx>
Date: Thu, 23 Jan 2014 01:23:53 -0000
Reply-to: Bug 1271441 <1271441@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: linux-lts-saucy (Ubuntu Precise)
       Status: New => Fix Committed

** Changed in: linux (Ubuntu Saucy)
       Status: New => Fix Committed

** Changed in: linux (Ubuntu Trusty)
       Status: New => Invalid

** Changed in: linux-ti-omap4 (Ubuntu Trusty)
       Status: New => Invalid

** Description changed:

- missing CPU-state sanitation during task-switch causes DOS / privilege
- escalation
+ The restore_fpu_checking function in arch/x86/include/asm/fpu-internal.h
+ in the Linux kernel before 3.12.8 on the AMD K7 and K8 platforms does
+ not clear pending exceptions before proceeding to an EMMS instruction,
+ which allows local users to cause a denial of service (task kill) or
+ possibly gain privileges via a crafted application.
+ 
+ Break-Fix: - 26bef1318adc1b3a530ecc807ef99346db2aa8b0

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https://bugs.launchpad.net/bugs/1271441

Title:
  CVE-2014-1438

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

Bug description:
  The restore_fpu_checking function in arch/x86/include/asm/fpu-
  internal.h in the Linux kernel before 3.12.8 on the AMD K7 and K8
  platforms does not clear pending exceptions before proceeding to an
  EMMS instruction, which allows local users to cause a denial of
  service (task kill) or possibly gain privileges via a crafted
  application.

  Break-Fix: - 26bef1318adc1b3a530ecc807ef99346db2aa8b0

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References

[Bug 1271441] [NEW] CVE-2014-1438
From: John Johansen, 2014-01-22