[ GLSA 200402-06 ] Linux kernel AMD64 ptrace vulnerability

From: Tim Yamin (plasmaroo_at_gentoo.org)
Date: 02/17/04

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    Date: Tue, 17 Feb 2004 02:27:48 +0000
To: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com, security-alerts@linuxsecurity.com, gentoo-core@gentoo.org, gentoo-announce@gentoo.org

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    Gentoo Linux Security Advisory GLSA 200402-06
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    ~ http://security.gentoo.org
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    ~ Severity: Normal
    ~ Title: Linux kernel AMD64 ptrace vulnerability
    ~ Date: February 17, 2004
    ~ ID: 200402-06

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    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.

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