[ GLSA 200402-06 ] Linux kernel AMD64 ptrace vulnerability

[Tim Yamin <plasmaroo () gentoo org>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200402-06
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
~                                            http://security.gentoo.org
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

~  Severity: Normal
~     Title: Linux kernel AMD64 ptrace vulnerability
~      Date: February 17, 2004
~        ID: 200402-06

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

A vulnerability has been discovered by in the ptrace emulation code for
AMD64 platforms when eflags are processed, allowing a local user to
obtain elevated priveleges.

Affected packages
=================

~    -------------------------------------------------------
~               Kernel            /    Unaffected Version
~    -------------------------------------------------------

~    ck-sources..........................2.6.2-r1...........
~    development-sources.................2.6.2..............
~    gentoo-dev-sources..................2.6.2..............
~    gentoo-sources......................2.4.20-r12.........
~    gs-sources..........................2.4.25_pre7-r1.....
~    vanilla-prepatch-sources............2.4.25_rc3.........
~    vanilla-sources.....................2.4.24-r1..........

Description
===========

A vulnerability has been discovered by Andi Kleen in the ptrace
emulation code for AMD64 platforms when eflags are processed, allowing a
local user to obtain elevated priveleges. The Common Vulnerabilities and
Exposures project has assigned CAN-2004-0001 to this issue.

Impact
======

( Only users of the AMD64 platform are affected )

In this scenario, a user may be able to obtain elevated priveleges,
including root access. However, no public exploit is known for the
vulnerability at this time.

Workaround
==========

There is no temporary workaround - a kernel upgrade is required. A list
of unaffected kernels is provided along with this announcement.

Resolution
==========

Users are encouraged to upgrade to the latest available sources for
their system:

~  # emerge sync
~  # emerge -pv your-favorite-sources

~  # emerge your-favorite-sources

~  # # Follow usual procedures for compiling and installing a kernel.
~  # # If you use genkernel, run genkernel as you would do normally.

~  # # See http://www.gentoo.org/doc/en/handbook/handbook.xml for help.

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFAMXwiMMXbAy2b2EIRAqDmAKDhG09r3rq6xFlOIB6i6auX1Fcc/ACeO0wE
/deJ+dBC2NsZ+bVLmCrHYZQ=
=IQWM
-----END PGP SIGNATURE-----