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Category:   Application (Security)  >   HPE IceWall Vendors:   HPE
HP IceWall TLS Diffie-Hellman Export Cipher Downgrade Attack Lets Remote Users Decrypt Connections
SecurityTracker Alert ID:  1032960
SecurityTracker URL:  http://securitytracker.com/id/1032960
CVE Reference:   CVE-2015-4000   (Links to External Site)
Date:  Jul 16 2015
Impact:   Modification of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in HP IceWall. A remote user may be able to decrypt TLS connections in certain situations.

A remote user that can conduct a man-in-the-middle attack can cause the target system to downgrade the Diffie-Hellman algorithm to 512-bit export-grade cryptography. The remote user may then be able to decrypt the connection.

This vulnerability resides in the TLS protocol and not in the specific TLS implementation, but the vulnerability is exposed because the target system supports export-grade ciphers.

This attack is known as the "Logjam" attack.

The original advisory is available at:

https://weakdh.org/imperfect-forward-secrecy.pdf

David Adrian, Karthikeyan Bhargavan, Zakir Durumeric, Pierrick Gaudry, Matthew Green, J. Alex Halderman, Nadia Heninger, Drew Springall, Emmanuel Thome, Luke Valenta, Benjamin VanderSloot, Eric Wustrow, Santiago Zanella-Beguelin, and Paul Zimmermann reported this vulnerability.

Impact:   A remote user that can conduct a man-in-the-middle attack can cause the target system to use weak cryptography that can be decrypted.
Solution:   The vendor has provided remediation instructions in their advisory.

The vendor's advisory is available at:

https://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04710027

Vendor URL:  h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04710027 (Links to External Site)
Cause:   Authentication error

Message History:   None.


 Source Message Contents

Subject:  [security bulletin] HPSBGN03351 rev.1 - HP IceWall SSO Dfw, SSO Certd, MCRP, and Federation Agent running OpenSSL, Remote Disclosure of Information

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Note: the current version of the following document is available here:
https://h20564.www2.hp.com/portal/site/hpsc/public/kb/
docDisplay?docId=emr_na-c04710027

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c04710027
Version: 1

HPSBGN03351 rev.1 - HP IceWall SSO Dfw, SSO Certd, MCRP, and Federation Agent
running OpenSSL, Remote Disclosure of Information

NOTICE: The information in this Security Bulletin should be acted upon as
soon as possible.

Release Date: 2015-06-26
Last Updated: 2015-06-26

Potential Security Impact: Remote disclosure of information, unauthorized
access

Source: Hewlett-Packard Company, HP Software Security Response Team

VULNERABILITY SUMMARY
Potential security vulnerabilities have been identified with HP IceWall SSO
Dfw, SSO Certd, MCRP, and Federation Agent running OpenSSL. This is the TLS
vulnerability known as "Logjam", which could be exploited remotely to allow
disclosure of information.

References:

CVE-2015-4000
SSRT102103

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

HP IceWall MCRP v3.0
HP IceWall SSO Dfw v10.0
HP IceWall SSO Certd v10.0
HP IceWall Federation Agent v3.0

BACKGROUND

CVSS 2.0 Base Metrics
===========================================================
  Reference              Base Vector             Base Score
CVE-2015-4000    (AV:N/AC:M/Au:N/C:N/I:P/A:N)       4.3
===========================================================
             Information on CVSS is documented
            in HP Customer Notice: HPSN-2008-002

RESOLUTION

HP recommends the following software updates and workaround instructions to
resolve the vulnerabilities for HP IceWall SSO Dfw, SSO Certd, MCRP, and
Federation Agent.

  1. IceWall SSO Dfw v10.0 and Certd v10.0, which are running on RHEL, could
be using either the OS bundled OpenSSL library or the OpenSSL bundled with HP
IceWall. If still using the OpenSSL bundled with HP IceWall, please switch to
the OpenSSL library bundled with the OS, and then follow the instructions in
step 2.

  Documents are available at the following location with instructions to
switch to the OS bundled OpenSSL library:

    http://www.hp.com/jp/icewall_patchaccess

  2. For HP IceWall products running on RHEL and are using the OS bundled
OpenSSL, RHEL has provided a patch, for RHEL6 only, at the following
location:

    https://rhn.redhat.com/errata/RHSA-2015-1072.html

  3. For IceWall products running on HP-UX which are using the OS bundled
OpenSSL, please follow the WORKAROUND INSTRUCTIONS.

WORKAROUND INSTRUCTIONS

  HP recommends the following information to protect against potential risk
from CVE-2015-4000 for the following HP IceWall products.

    HP IceWall SSO Dfw and MCRP

      - If possible, do not use the SHOST setting which allows IceWall SSO
Dfw or MCRP to use SSL/TLS protocol to back-end web servers.

      - If possible, do not use EXPORT-grade ciphers on the back-end web
servers.

    HP IceWall SSO Certd

      - If possible, do not use the LDAPSSL setting which allows IceWall SSO
Certd to connect to the LDAP server using SSL/TLS protocol.

      - If possible, do not use EXPORT-grade ciphers on the LDAP server.

    IceWall Federation Agent

      - If possible, use "bindings:HTTP-POST" instead of
"bindings:HTTP-Artifact" setting in the service provider meta file. The
"bindings:HTTP-POST" setting would disable IWFA to use SSL for communicating
with IdP server.

Note: The HP IceWall product is only available in Japan.

HISTORY
Version:1 (rev.1) - 26 June 2014 Initial release

Third Party Security Patches: Third party security patches that are to be
installed on systems running HP software products should be applied in
accordance with the customer's patch management policy.

Support: For issues about implementing the recommendations of this Security
Bulletin, contact normal HP Services support channel.  For other issues about
the content of this Security Bulletin, send e-mail to security-alert@hp.com.

Report: To report a potential security vulnerability with any HP supported
product, send Email to: security-alert@hp.com

Subscribe: To initiate a subscription to receive future HP Security Bulletin
alerts via Email:
http://h41183.www4.hp.com/signup_alerts.php?jumpid=hpsc_secbulletins

Security Bulletin Archive: A list of recently released Security Bulletins is
available here:
https://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/

Software Product Category: The Software Product Category is represented in
the title by the two characters following HPSB.

3C = 3COM
3P = 3rd Party Software
GN = HP General Software
HF = HP Hardware and Firmware
MP = MPE/iX
MU = Multi-Platform Software
NS = NonStop Servers
OV = OpenVMS
PI = Printing and Imaging
PV = ProCurve
ST = Storage Software
TU = Tru64 UNIX
UX = HP-UX

Copyright 2015 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or editorial errors
or omissions contained herein. The information provided is provided "as is"
without warranty of any kind. To the extent permitted by law, neither HP or
its affiliates, subcontractors or suppliers will be liable for
incidental,special or consequential damages including downtime cost; lost
profits; damages relating to the procurement of substitute products or
services; or damages for loss of data, or software restoration. The
information in this document is subject to change without notice.
Hewlett-Packard Company and the names of Hewlett-Packard products referenced
herein are trademarks of Hewlett-Packard Company in the United States and
other countries. Other product and company names mentioned herein may be
trademarks of their respective owners.

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