kernel-packages team mailing list archive

[Steve Beattie <sbeattie@xxxxxxxxxx>]

** Description changed:

- A kernel bug in user namespaces allows root in a container to ptrace
- host-root-owned tasks during a window of opportunity during lxc-attach /
- 'lxc exec', before they drop privilege by doing setuid to the container
- root uid.
+ ** DISPUTED ** kernel/ptrace.c in the Linux kernel through 4.4.1
+ mishandles uid and gid mappings, which allows local users to gain
+ privileges by establishing a user namespace, waiting for a root process
+ to enter that namespace with an unsafe uid or gid, and then using the
+ ptrace system call.  NOTE: the vendor states "there is no kernel bug
+ here."

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https://bugs.launchpad.net/bugs/1527374

Title:
  CVE-2015-8709

Status in linux package in Ubuntu:
  Fix Released
Status in linux-armadaxp package in Ubuntu:
  Confirmed
Status in linux-flo package in Ubuntu:
  Confirmed
Status in linux-goldfish package in Ubuntu:
  Confirmed
Status in linux-lts-quantal package in Ubuntu:
  Confirmed
Status in linux-lts-raring package in Ubuntu:
  Confirmed
Status in linux-lts-saucy package in Ubuntu:
  Confirmed
Status in linux-lts-trusty package in Ubuntu:
  Confirmed
Status in linux-lts-utopic package in Ubuntu:
  Fix Released
Status in linux-lts-vivid package in Ubuntu:
  Fix Released
Status in linux-lts-wily package in Ubuntu:
  Fix Released
Status in linux-mako package in Ubuntu:
  Confirmed
Status in linux-manta package in Ubuntu:
  Confirmed
Status in linux-raspi2 package in Ubuntu:
  Fix Released
Status in linux-ti-omap4 package in Ubuntu:
  Confirmed
Status in lxc package in Ubuntu:
  Confirmed
Status in linux source package in Precise:
  Invalid
Status in linux-lts-trusty source package in Precise:
  Fix Released
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Vivid:
  Fix Released
Status in linux source package in Wily:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  ** DISPUTED ** kernel/ptrace.c in the Linux kernel through 4.4.1
  mishandles uid and gid mappings, which allows local users to gain
  privileges by establishing a user namespace, waiting for a root
  process to enter that namespace with an unsafe uid or gid, and then
  using the ptrace system call.  NOTE: the vendor states "there is no
  kernel bug here."

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