kernel-packages team mailing list archive

[John Johansen <john.johansen@xxxxxxxxxxxxx>]

*** This bug is a security vulnerability ***

Public security bug reported:

The do_umount function in fs/namespace.c in the Linux kernel through
3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb
calls that change the root filesystem to read-only, which allows local
users to cause a denial of service (loss of writability) by making
certain unshare system calls, clearing the / MNT_LOCKED flag, and making
an MNT_FORCE umount system call.

Break-Fix: - a1480dcc3c706e309a88884723446f2e84fedd5b

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: New

** Affects: linux-armadaxp (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-ec2 (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-fsl-imx51 (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-backport-maverick (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-lts-backport-natty (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-lts-quantal (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-raring (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-saucy (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-mvl-dove (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux-ti-omap4 (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: linux (Ubuntu Lucid)
     Importance: Medium
         Status: New

** Affects: linux-armadaxp (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux-ec2 (Ubuntu Lucid)
     Importance: Medium
         Status: New

** Affects: linux-fsl-imx51 (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-backport-maverick (Ubuntu Lucid)
     Importance: Undecided
         Status: New

** Affects: linux-lts-backport-natty (Ubuntu Lucid)
     Importance: Undecided
         Status: New

** Affects: linux-lts-quantal (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-raring (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-saucy (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux-mvl-dove (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux-ti-omap4 (Ubuntu Lucid)
     Importance: Medium
         Status: Invalid

** Affects: linux (Ubuntu Precise)
     Importance: Medium
         Status: New

** Affects: linux-armadaxp (Ubuntu Precise)
     Importance: Medium
         Status: New

** Affects: linux-ec2 (Ubuntu Precise)
     Importance: Medium
         Status: Invalid

** Affects: linux-fsl-imx51 (Ubuntu Precise)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-backport-maverick (Ubuntu Precise)
     Importance: Undecided
         Status: New

** Affects: linux-lts-backport-natty (Ubuntu Precise)
     Importance: Undecided
         Status: New

** Affects: linux-lts-quantal (Ubuntu Precise)
     Importance: Medium
         Status: New

** Affects: linux-lts-raring (Ubuntu Precise)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-saucy (Ubuntu Precise)
     Importance: Medium
         Status: New

** Affects: linux-mvl-dove (Ubuntu Precise)
     Importance: Medium
         Status: Invalid

** Affects: linux-ti-omap4 (Ubuntu Precise)
     Importance: Medium
         Status: New

** Affects: linux (Ubuntu Trusty)
     Importance: Medium
         Status: New

** Affects: linux-armadaxp (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-ec2 (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-fsl-imx51 (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-backport-maverick (Ubuntu Trusty)
     Importance: Undecided
         Status: New

** Affects: linux-lts-backport-natty (Ubuntu Trusty)
     Importance: Undecided
         Status: New

** Affects: linux-lts-quantal (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-raring (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-saucy (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-mvl-dove (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux-ti-omap4 (Ubuntu Trusty)
     Importance: Medium
         Status: Invalid

** Affects: linux (Ubuntu Utopic)
     Importance: Medium
         Status: New

** Affects: linux-armadaxp (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-ec2 (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-fsl-imx51 (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-backport-maverick (Ubuntu Utopic)
     Importance: Undecided
         Status: New

** Affects: linux-lts-backport-natty (Ubuntu Utopic)
     Importance: Undecided
         Status: New

** Affects: linux-lts-quantal (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-raring (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-lts-saucy (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-mvl-dove (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid

** Affects: linux-ti-omap4 (Ubuntu Utopic)
     Importance: Medium
         Status: Invalid


** Tags: kernel-cve-tracking-bug

** Tags added: kernel-cve-tracking-bug

** Information type changed from Public to Public Security

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2014-7975

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1383358

Title:
  CVE-2014-7975

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

Bug description:
  The do_umount function in fs/namespace.c in the Linux kernel through
  3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb
  calls that change the root filesystem to read-only, which allows local
  users to cause a denial of service (loss of writability) by making
  certain unshare system calls, clearing the / MNT_LOCKED flag, and
  making an MNT_FORCE umount system call.

  Break-Fix: - a1480dcc3c706e309a88884723446f2e84fedd5b

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