engarde-users March 2003 archive
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engarde-users: [EnGarde] [ESA-20030320-010] Several vulnerabilit

[EnGarde] [ESA-20030320-010] Several vulnerabilities in the OpenSSL toolkit.

From: EnGarde Secure Linux <security_at_nospam>
Date: Thu Mar 20 2003 - 13:52:36 GMT
To: engarde-security@guardiandigital.com, bugtraq@securityfocus.com

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| EnGarde Secure Linux Security Advisory March 20, 2003 |
| http://www.engardelinux.org/ ESA-20030320-010 |
| |
| Package: openssl |
| Summary: Several vulnerabilities in the OpenSSL toolkit. |
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  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
- --------
  Recently several vulnerabilities have been found in the OpenSSL   toolkit.

  The Common Vulnerabilities and Exposures project (cve.mitre.org) has   assigned the names CAN-2003-0131 and CAN-2003-0147 to these issues.

  CAN-2003-0131



  Vlastimil Klima, Ondrej Pokorny, and Tomas Rosa have come up with an   extension of the "Bleichenbacher attack" on RSA with PKCS #1 v1.5   padding as used in SSL 3.0 and TLS 1.0 [1].

  OpenSSL has been found to be vulnerable to this type of attack.

  CAN-2003-0147



  Recently David Brumley and Dan Boneh of Stanford University discovered   and documented [2] a timing attack against RSA private keys, to be   presented at the UNIX Security Symposium.

  OpenSSL has been found to be vulnerable to this type of attack if RSA   blinding [3] is not enabled (which it is not by default). To defend   against this vulnerability, this update enables RSA blinding by default.

  All users are recommended to upgrade immediately using the special   SOLUTION in this advisory. [1] http://eprint.iacr.org/2003/052/ [2] http://crypto.stanford.edu/~dabo/abstracts/ssl-timing.html [3] http://www.openssl.org/docs/crypto/RSA_blinding_on.html

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:

  1. be booted into a "standard" kernel; or
  2. 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

  Once the updated packages are installed, you must restart all the   daemons which use the OpenSSL libraries. You may either reboot the   system or restart the following daemons: httpd -- Apache web server (with mod_ssl) snortd -- Snort intrusion detection system sshd -- Secure shell daemon stunnel-imap -- SSL-enabled IMAP daemon stunnel-pop3 -- SSL-enabled POP3 daemon

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

  Source Packages:

    SRPMS/openssl-0.9.6-1.0.19.src.rpm
      MD5 Sum: 950c1b57ac45404a4cbfc92143fbef8f

  Binary Packages:

    i386/openssl-0.9.6-1.0.19.i386.rpm
      MD5 Sum: cf76fc7d51366228d86b6ccc646ea234

    i386/openssl-misc-0.9.6-1.0.19.i386.rpm       MD5 Sum: e5eeee84ba5db7e3e320eebd66851ee2

    i686/openssl-0.9.6-1.0.19.i686.rpm
      MD5 Sum: cdf88671bfacf2157fe999fff844d9c2

    i686/openssl-misc-0.9.6-1.0.19.i686.rpm       MD5 Sum: d0ad30b1522741299e6d689fd02df774

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@guardiandigital.com   EnGarde Advisories: http://www.engardelinux.org/advisories.html

  • -------------------------------------------------------------------------- $Id: ESA-20030320-010-openssl,v 1.2 2003/03/20 13:36:57 rwm Exp $
  • -------------------------------------------------------------------------- Author: Ryan W. Maple <ryan@guardiandigital.com> Copyright 2003, Guardian Digital, Inc.

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