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CVE-2010-4258

Published: 30 December 2010

The do_exit function in kernel/exit.c in the Linux kernel before 2.6.36.2 does not properly handle a KERNEL_DS get_fs value, which allows local users to bypass intended access_ok restrictions, overwrite arbitrary kernel memory locations, and gain privileges by leveraging a (1) BUG, (2) NULL pointer dereference, or (3) page fault, as demonstrated by vectors involving the clear_child_tid feature and the splice system call.

From the Ubuntu security team

Nelson Elhage discovered that the kernel did not correctly handle process cleanup after triggering a recoverable kernel bug. If a local attacker were able to trigger certain kinds of kernel bugs, they could create a specially crafted process to gain root privileges.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy
Released (2.6.24-29.88)
karmic Ignored
(was pending now end-of-life)
lucid
Released (2.6.32-28.52)
maverick
Released (2.6.35-25.43)
natty
Released (2.6.37-9.22)
upstream
Released (2.6.37~rc5)
Patches:
upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=33dd94ae1ccbfb7bf0fb6c692bc3d1c4269e6177
linux-ec2
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Ignored
(reached end-of-life)
lucid
Released (2.6.32-312.24)
maverick Ignored
(binary supplied by "linux" now)
natty Does not exist

upstream
Released (2.6.37~rc5)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Ignored
(reached end-of-life)
lucid
Released (2.6.31-609.26)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc5)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Does not exist

lucid
Released (2.6.35-25.44~lucid1)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc5)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable
(2.6.38-1.27~lucid1)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc5)
linux-mvl-dove
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Ignored
(abandonded branch)
lucid
Released (2.6.32-214.30)
maverick
Released (2.6.32-414.30)
natty Does not exist

upstream
Released (2.6.37~rc5)
linux-source-2.6.15
Launchpad, Ubuntu, Debian
dapper
Released (2.6.15-57.97)
hardy Does not exist

karmic Does not exist

lucid Does not exist

maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc5)
linux-ti-omap4
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Does not exist

lucid Does not exist

maverick
Released (2.6.35-903.22)
natty Not vulnerable
(2.6.38-1201.2)
upstream
Released (2.6.37~rc5)