[slackware-security] Slackware 8.1 kernel security update (SSA:2004-008-01)

From: Slackware Security Team (security_at_slackware.com)
Date: 01/09/04

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    Date: Thu, 8 Jan 2004 20:04:57 -0800 (PST)
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    [slackware-security] Slackware 8.1 kernel security update (SSA:2004-008-01)

    New kernels are available for Slackware 8.1 containing a
    backported fix from a bounds-checking problem in the kernel's
    mremap() call which could be used by a local attacker to gain
    root privileges. This fix was previously issued for Slackware
    9.0, 9.1, and -current (SSA:2004-006-01).

    Sites running Slackware 8.1 should upgrade to the new kernel.
    After installing the new kernel, be sure to run 'lilo'.

    More details about this issue may be found in the Common
    Vulnerabilities and Exposures (CVE) database:

      http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0985

    Here are the details from the Slackware 8.1 ChangeLog:
    +--------------------------+
    Thu Jan 8 18:21:27 PST 2004
    patches/kernels/*: These are 2.4.18 kernels containing a backported
      fix for a security problem with the kernel's mremap() function.
      A local user could exploit this hole to gain root privileges.
      For more details, see:
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0985
      After installing the new kernel, be sure to run 'lilo'.
      (* Security fix *)
    patches/packages/kernel-ide-2.4.18-i386-5.tgz: Patched mremap().
      (* Security fix *)
    patches/packages/kernel-source-2.4.18-noarch-6.tgz: This is
      the source code from kernel-source-2.4.18-noarch-5 with the fix
      for mremap().
      (* Security fix *)
    +--------------------------+

    WHERE TO FIND THE NEW PACKAGES:
    +-----------------------------+

    Updated packages for Slackware 8.1:
    ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/packages/kernel-ide-2.4.18-i386-5.tgz
    ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/packages/kernel-source-2.4.18-noarch-6.tgz

    An alternate kernel may be installed. Those are found in this directory:
    ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/kernels/

    MD5 SIGNATURES:
    +-------------+

    MD5 signatures may be downloaded from our FTP server:

    Slackware 8.1 packages:
    ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/CHECKSUMS.md5

    To verify authenticity, this file has been signed with the Slackware
    GPG key (use 'gpg --verify'):

    ftp://ftp.slackware.com/pub/slackware/slackware-8.1/patches/CHECKSUMS.md5.asc

    INSTALLATION INSTRUCTIONS:
    +------------------------+

    Use upgradepkg to install the new kernel, kernel-modules, and alsa packages.
    After installing the kernel-ide package you will need to run lilo ('lilo' at
    a command prompt) or create a new system boot disk ('makebootdisk'), and
    reboot.

    If desired, a kernel from the kernels/ directory may be used instead. For
    example, to use the kernel in kernels/scsi.s/, you would copy it to the
    boot directory like this:

    cd kernels/scsi.s
    cp bzImage /boot/vmlinuz-scsi.s-2.4.18

    Create a symbolic link:
    ln -sf /boot/vmlinuz-scsi.s-2.4.18 /boot/vmlinuz

    Then, run 'lilo' or create a new system boot disk and reboot.

    +-----+

    Slackware Linux Security Team
    http://slackware.com/gpg-key
    security@slackware.com

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