kernel-packages team mailing list archive

[John Johansen <john.johansen@xxxxxxxxxxxxx>]

** Description changed:

- The tty atomic_write_lock does not provide an exclusion guarantee for
- the tty driver if the termios settings are LECHO & !OPOST. And since it
- is unexpected and not allowed to call TTY buffer helpers like
- tty_insert_flip_string concurrently, this may lead to crashes when
- concurrect writers call pty_write. In that case the following two
+ The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel
+ through 3.14.3 does not properly manage tty driver access in the "LECHO
+ & !OPOST" case, which allows local users to cause a denial of service
+ (memory corruption and system crash) or gain privileges by triggering a
+ race condition involving read and write operations with long strings.
  
  Break-Fix: d945cb9cce20ac7143c2de8d88b187f62db99bdc
  4291086b1f081b869c6d79e5b7441633dc3ace00

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https://bugs.launchpad.net/bugs/1314762

Title:
  CVE-2014-0196

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-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:
  Fix Released
Status in “linux-armadaxp” source package in Lucid:
  Invalid
Status in “linux-ec2” source package in Lucid:
  Fix Released
Status in “linux-fsl-imx51” 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-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:
  Fix Released
Status in “linux-armadaxp” source package in Precise:
  Fix Committed
Status in “linux-ec2” source package in Precise:
  Invalid
Status in “linux-fsl-imx51” 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-lts-saucy” 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:
  Fix Committed
Status in “linux” source package in Quantal:
  Fix Released
Status in “linux-armadaxp” source package in Quantal:
  Fix Committed
Status in “linux-ec2” source package in Quantal:
  Invalid
Status in “linux-fsl-imx51” 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-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:
  Fix Committed
Status in “linux” source package in Saucy:
  Fix Released
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-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:
  Fix Committed
Status in “linux” source package in Trusty:
  Fix Released
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-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-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 n_tty_write function in drivers/tty/n_tty.c in the Linux kernel
  through 3.14.3 does not properly manage tty driver access in the
  "LECHO & !OPOST" case, which allows local users to cause a denial of
  service (memory corruption and system crash) or gain privileges by
  triggering a race condition involving read and write operations with
  long strings.

  Break-Fix: d945cb9cce20ac7143c2de8d88b187f62db99bdc
  4291086b1f081b869c6d79e5b7441633dc3ace00

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