full-disclosure - [ESA-20030220-005] OpenSSL timing-based attack vulnerability

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From: security at guardiandigital.com (EnGarde Secure Linux)
Subject: [ESA-20030220-005] OpenSSL timing-based attack vulnerability

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+------------------------------------------------------------------------+
| EnGarde Secure Linux Security Advisory               February 20, 2003 |
| http://www.engardelinux.org/                          ESA-20030220-005 |
|                                                                        |
| Packages: openssl, openssl-misc                                        |
| Summary:  OpenSSL timing-based attack vulnerability.                   |
+------------------------------------------------------------------------+

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

OVERVIEW
- --------
  In an upcoming paper, Brice Canvel (EPFL), Alain Hiltgen (UBS), Serge
  Vaudenay (EPFL), and Martin Vuagnoux (EPFL, Ilion) describe and
  demonstrate a timing-based attack on CBC cipher suites used in SSL and
  TLS.

  OpenSSL has been found to vulnerable to this attack.  This update
  fixes these vulnerabilities.

  Please refer to the OpenSSL advisory for more information on this
  attack:

    http://www.openssl.org/news/secadv_20030219.txt

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has
  assigned the name CAN-2003-0078 to this issue.

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/

  Before upgrading the package, the machine must either:

    a) be booted into a "standard" kernel; or
    b) have LIDS disabled.

  To disable LIDS, execute the command:

    # /sbin/lidsadm -S -- -LIDS_GLOBAL

  To install the updated package, execute the command:

    # rpm -Uvh files

  You must now update the LIDS configuration by executing the command:

    # /usr/sbin/config_lids.pl

  To re-enable LIDS (if it was disabled), execute the command:

    # /sbin/lidsadm -S -- +LIDS_GLOBAL

  To verify the signatures of the updated packages, execute the command:

    # rpm -Kv files

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

  Source Packages:

    SRPMS/openssl-0.9.6-1.0.18.src.rpm
      MD5 Sum: 37aee34f5d230ceb5fe6d7ef5fbf69e6

  Binary Packages:

    i386/openssl-0.9.6-1.0.18.i386.rpm
      MD5 Sum: df7657e406732b3abc7b7b3414bf07b2

    i386/openssl-misc-0.9.6-1.0.18.i386.rpm
      MD5 Sum: d251465a15f7167dee9a0929af23edd9

    i686/openssl-0.9.6-1.0.18.i686.rpm
      MD5 Sum: 707774a9ad3d06e6596b7389745ee89e

    i686/openssl-misc-0.9.6-1.0.18.i686.rpm
      MD5 Sum: e09d2a7e893f12247475a8821abee3da

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

  OpenSSL's Official Web Site:
    http://www.openssl.org/

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

- --------------------------------------------------------------------------
$Id: ESA-20030220-005-openssl,v 1.1 2003/02/20 16:23:30 rwm Exp $
- --------------------------------------------------------------------------
Author: Ryan W. Maple <ryan@...rdiandigital.com>
Copyright 2003, Guardian Digital, Inc.

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Copyright(c) 2002 Guardian Digital, Inc.                EnGardeLinux.org
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