full-disclosure - [ESA-20021022-026] local kernel vulnerabilities

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From: security at guardiandigital.com (EnGarde Secure Linux)
Subject: [ESA-20021022-026] local kernel vulnerabilities

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+------------------------------------------------------------------------+
| EnGarde Secure Linux Security Advisory                October 22, 2002 |
| http://www.engardelinux.org/                          ESA-20021022-026 |
|                                                                        |
| Package: kernel                                                        |
| Summary: local vulnerabilities.                                        |
+------------------------------------------------------------------------+

  EnGarde Secure Linux is a secure distribution of Linux that features
  improved access control, host and network intrusion detection, Web
  based secure remote management, complete e-commerce using AllCommerce,
  and integrated open source security tools.

OVERVIEW
- --------
  There are several potentially exploitable local vulnerabilities in the
  Linux kernel.  During a code audit several sign handling, math
  overflow, and other vulnerabilities were fixed.  These fixes were made
  in 2.2.22-rc1 and have been backported to our kernel.

  Thanks to Silvio Cesare and Solar Designer for discovering and fixing
  these vulnerabilities. 

  All users are recommended to upgrade immediately using the special
  SOLUTION in this advisory.

SOLUTION
- --------
  Users of the EnGarde Professional edition can use the Guardian Digital
  Secure Network to update their systems automatically.

  EnGarde Community users should upgrade to the most recent version
  as outlined in this advisory.  Updates may be obtained from:

    ftp://ftp.engardelinux.org/pub/engarde/stable/updates/
    http://ftp.engardelinux.org/pub/engarde/stable/updates/

  Please read and understand this entire section before you attempt to
  upgrade the kernel.

  Initial Steps
  -------------
    1) Verify the machine is either:

       a) booted into a "standard" kernel; or
       b) LIDS is disabled (/sbin/lidsadm -S -- -LIDS_GLOBAL)

    2) Determine which kernels you currently have installed:

         # rpm -qa --qf "%{NAME}\n" | grep kernel

    3) Download the new kernels that match what you have installed
       (based on step 2) from the "UPDATED PACKAGES" section of this
       advisory.

  Installation Steps
  ------------------
    4) Install the new packages.  The packages will automagically
       update /etc/lilo.conf by commenting out any old EnGarde images
       and replacing them with the new ones:

         # rpm --replacefiles -i <kernel 1> <kernel 2> ...

    5) Re-run LILO.  If you see any errors then open /etc/lilo.conf in
       your favorite text editor and make the appropriate changes:

         #  /sbin/lilo

  Final Steps
  -----------
    6) If you did not see any LILO errors then your new kernel is now
       installed and your machine is ready to be rebooted:

         # reboot

UPDATED PACKAGES
- ----------------
  These updated packages are for EnGarde Secure Linux Community
  Edition.

  Source Packages:

    SRPMS/kernel-2.2.19-1.0.28.src.rpm
      MD5 Sum: 71843bb8f162d56ae14e499ccaa8a4e1

  Binary Packages:

    i386/kernel-2.2.19-1.0.28.i386.rpm
      MD5 Sum: ef33bde310550948f4548e3622c9e7cb

    i386/kernel-lids-mods-2.2.19-1.0.28.i386.rpm
      MD5 Sum: 8b0c3b8e2d3ee4df9b028c1e53e2ca86

    i386/kernel-smp-lids-mods-2.2.19-1.0.28.i386.rpm
      MD5 Sum: cad473075eef2491100d48017c275687

    i386/kernel-smp-mods-2.2.19-1.0.28.i386.rpm
      MD5 Sum: 89cb4cb58b4ef42a0b7d06b9148ed249

    i686/kernel-2.2.19-1.0.28.i686.rpm
      MD5 Sum: c35310e49a2ac1afdfa926f10ecbbdc6

    i686/kernel-lids-mods-2.2.19-1.0.28.i686.rpm
      MD5 Sum: 9ec5ef1f8c0603f351978ed6c9723f51

    i686/kernel-smp-lids-mods-2.2.19-1.0.28.i686.rpm
      MD5 Sum: 19849ab6f20fb8215249e90e7cf00416

    i686/kernel-smp-mods-2.2.19-1.0.28.i686.rpm
      MD5 Sum: 41672c1ee25897cbc45fa54826aa9a06

REFERENCES
- ----------
  Guardian Digital's public key:
    http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY

  Official Web Site of the Linux Kernel:
    http://www.kernel.org/

  Security Contact:   security@...rdiandigital.com
  EnGarde Advisories: http://www.engardelinux.org/advisories.html

- --------------------------------------------------------------------------
$Id: ESA-20021022-026-kernel,v 1.3 2002/10/22 11:50:44 rwm Exp $
- --------------------------------------------------------------------------
Author: Ryan W. Maple <ryan@...rdiandigital.com> 
Copyright 2002, Guardian Digital, Inc.

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Copyright(c) 2001 Guardian Digital, Inc.                EnGardeLinux.org
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