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UNIRAS Brief - 301/04 - Three Red Hat Security Advisories:



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 301/04 dated 16.06.04  Time: 14:50  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Three Red Hat Security Advisories:

1. RHSA-2004:244-01 - Updated Tripwire packages fix security flaw

2. RHSA-2004:245-01 - Updated httpd and mod_ssl packages fix minor 
Apache security vulnerabilities.

3. RHSA-2004:240-01 - Updated SquirrelMail package fixes multiple vulnerabilities.



Detail
====== 

1. Paul Herman discovered a format string vulnerability in Tripwire version 
2.3.1 and earlier.  If Tripwire is configured to send reports via email, a 
local user could gain privileges by creating a carefully crafted file.  
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned 
the name CAN-2004-0536 to this issue.


2. A buffer overflow was found in the Apache proxy module, mod_proxy, which can be 
triggered by receiving an invalid Content-Length header.  In order to exploit this 
issue, an attacker would need an Apache installation that was configured as a proxy 
to connect to a malicious site.  This would cause the Apache child processing the 
request to crash.  The Common Vulnerabilities and Exposures project (cve.mitre.org) 
has assigned the name CAN-2004-0492 to this issue.


3. SquirrelMail is a webmail package written in PHP.  Multiple vulnerabilities have 
been found which affect the version of SquirrelMail shipped with Red Hat Enterprise 
Linux 3.






1.



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Hash: SHA1

===========================================================================
             

                     ESB-2004.0412 -- RHSA-2004:244-01
                Updated Tripwire packages fix security flaw
                               16 June 2004

===========================================================================

        

Product:                Tripwire
Publisher:              Red Hat
Operating System:       Red Hat Enterprise Linux AS (Advanced Server)
                        version 2.1
                        Red Hat Enterprise Linux ES version 2.1
                        Red Hat Enterprise Linux WS version 2.1
                        Linux variants
                        UNIX variants
Impact:                 Increased Privileges
Access Required:        Existing Account
CVE Names:              CAN-2004-0536

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Hash: SHA1

- - - ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated Tripwire packages fix security flaw
Advisory ID:       RHSA-2004:244-01
Issue date:        2004-06-14
Updated on:        2004-06-14
Product:           Red Hat Enterprise Linux
Keywords:          
Cross references:  
Obsoletes:         
CVE Names:         CAN-2004-0536
- - - ---------------------------------------------------------------------

1. Topic:

Updated Tripwire packages that fix a format string security vulnerability are now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386 Red Hat Enterprise Linux ES 
version 2.1 - i386 Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

Tripwire is a system integrity assessment tool.

Paul Herman discovered a format string vulnerability in Tripwire version 2.3.1 and earlier.  
If Tripwire is configured to send reports via email, a local user could gain privileges by 
creating a carefully crafted file.  The Common Vulnerabilities and Exposures project 

(cve.mitre.org) has assigned the name CAN-2004-0536 to this issue.
Users of Tripwire are advised to upgrade to this erratum package which contains a backported 
security patch to correct this issue.  The erratum package also contains some minor bug fixes.

4. Solution:

Before applying this update, make sure all previously released errata relevant to your 
system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those RPMs which are 
currently installed will be updated.  Those RPMs which are not installed but included in 
the list will not be updated.  Note that you can also use wildcards (*.rpm) if your current 
directory *only* contains the desired RPMs.

Please note that this update is also available via Red Hat Network.  Many people find this 
an easier way to apply updates.  To use Red Hat Network, launch the Red Hat Update Agent 
with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being 
upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need 
to install a version of the up2date client with an updated certificate.  The latest 
version of up2date is available from the Red Hat FTP site and may also be downloaded 
directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

70502 - Old File Checks in sample policy configuration file 72259 - Missing policyguide.txt 
in tripwire RPM 125176 - CAN-2004-0536 tripwire privilege escalation flaw

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/tripwire-2.3.1-18.src.rpm

i386:
Available from Red Hat Network: tripwire-2.3.1-18.i386.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/tripwire-2.3.1-18.src.rpm

i386:
Available from Red Hat Network: tripwire-2.3.1-18.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/tripwire-2.3.1-18.src.rpm

i386:
Available from Red Hat Network: tripwire-2.3.1-18.i386.rpm



7. Verification:

MD5 sum                          Package Name
- - - --------------------------------------------------------------------------
ab6af85788d25ae312cbec3a768be2c8 tripwire-2.3.1-18.i386.rpm b5eae5cd1780f649cc9cd5d123d4bb5c tripwire-2.3.1-18.src.rpm


These packages are GPG signed by Red Hat for security.  Our key is available from 
https://www.redhat.com/security/team/key.html

You can verify each package with the following command:
    
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or tampered with, 
examine only the md5sum with the following command:
    
    md5sum <filename>


8. References:

http://marc.theaimsgroup.com/?l=bugtraq&m=108627481507249
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0536

9. Contact:

The Red Hat security contact is <secalert@xxxxxxxxxx>.  More contact details at 
https://www.redhat.com/security/team/contact.html

Copyright 2004 Red Hat, Inc.
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2.




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===========================================================================
            

                     ESB-2004.0413 -- RHSA-2004:245-01
       Updated httpd and mod_ssl packages fix minor Apache security
                              vulnerabilities
                               16 June 2004

===========================================================================

        

Product:                Apache HTTP Server
Publisher:              Red Hat
Operating System:       Red Hat Enterprise Linux AS (Advanced Server)
                        version 2.1
                        Red Hat Linux Advanced Workstation 2.1
                        Red Hat Enterprise Linux ES version 2.1
                        Red Hat Enterprise Linux WS version 2.1
                        Linux variants
Impact:                 Reduced Security
Access Required:        Remote
CVE Names:              CAN-2004-0492

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                   Red Hat Security Advisory

Synopsis:          Updated httpd and mod_ssl packages fix minor Apache security vulnerabilities
Advisory ID:       RHSA-2004:245-01
Issue date:        2004-06-14
Updated on:        2004-06-14
Product:           Red Hat Enterprise Linux
Keywords:          Apache httpd ASF mod_ssl mod_proxy FakeBasicAuth
Cross references:  
Obsoletes:         RHBA-2004:101
CVE Names:         CAN-2004-0488 CAN-2004-0492
- - - ---------------------------------------------------------------------

1. Topic:

Updated httpd and mod_ssl packages that fix minor security issues in the Apache Web server are 
now available for Red Hat Enterprise Linux 2.1.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64 Red Hat Linux Advanced 
Workstation 2.1 - ia64 Red Hat Enterprise Linux ES version 2.1 - i386 Red Hat Enterprise Linux 
WS version 2.1 - i386

3. Problem description:

The Apache HTTP Server is a powerful, full-featured, efficient, and freely-available Web server.

A buffer overflow was found in the Apache proxy module, mod_proxy, which can be triggered by 
receiving an invalid Content-Length header.  In order to exploit this issue, an attacker would 
need an Apache installation that was configured as a proxy to connect to a malicious site.  This 
would cause the Apache child processing the request to crash.  The Common Vulnerabilities and 
Exposures project (cve.mitre.org) has assigned the name CAN-2004-0492 to this issue.

On Red Hat Enterprise Linux platforms Red Hat believes this issue cannot lead to remote code 
execution.  This issue also does not represent a Denial of Service attack as requests will 
continue to be handled by other Apache child processes.

A stack buffer overflow was discovered in mod_ssl which can be triggered if using the FakeBasicAuth 
option.  If mod_ssl is sent a client certificate with a subject DN field longer than 6000 characters, 
a stack overflow can occur if FakeBasicAuth has been enabled.  In order to exploit this issue the 
carefully crafted malicious certificate would have to be signed by a Certificate Authority which 
mod_ssl is configured to trust.  The Common Vulnerabilities and Exposures project (cve.mitre.org) 
has assigned the name CAN-2004-0488 to this issue.

This update also fixes a DNS handling bug in mod_proxy.

The mod_auth_digest module is now included in the Apache package and should be used instead of 
mod_digest for sites requiring Digest authentication.

Red Hat Enterprise Linux 2.1 users of the Apache HTTP Server should upgrade to these erratum 
packages, which contains Apache version 1.3.27 with 
backported patches correcting these issues.

4. Solution:

Before applying this update, make sure all previously released errata relevant to your system 
have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those RPMs which are currently 
installed will be updated.  Those RPMs which are not installed but included in the list will not 
be updated.  Note that you can also use wildcards (*.rpm) if your current directory *only* contains 
the desired RPMs.

Please note that this update is also available via Red Hat Network.  Many people find this an easier 
way to apply updates.  To use Red Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being 
upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to 
install a version of the up2date client with an updated certificate.  The latest version 
of up2date is available from the Red Hat FTP site and may also be downloaded directly 
from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

125704 - CAN-2004-0492 mod_proxy buffer overflow
122637 - mod_proxy does reverse DNS lookups (AS2.1)

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/apache-1.3.27-8.ent.src.rpm
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/mod_ssl-2.8.12-4.src.rpm

i386:
Available from Red Hat Network: apache-1.3.27-8.ent.i386.rpm Available from Red Hat Network: 
apache-devel-1.3.27-8.ent.i386.rpm
Available from Red Hat Network: apache-manual-1.3.27-8.ent.i386.rpm
Available from Red Hat Network: mod_ssl-2.8.12-4.i386.rpm

ia64:
Available from Red Hat Network: apache-1.3.27-8.ent.ia64.rpm Available from Red Hat Network: 
apache-devel-1.3.27-8.ent.ia64.rpm
Available from Red Hat Network: apache-manual-1.3.27-8.ent.ia64.rpm
Available from Red Hat Network: mod_ssl-2.8.12-4.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/apache-1.3.27-8.ent.src.rpm
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/mod_ssl-2.8.12-4.src.rpm

ia64:
Available from Red Hat Network: apache-1.3.27-8.ent.ia64.rpm Available from Red Hat Network: 
apache-devel-1.3.27-8.ent.ia64.rpm
Available from Red Hat Network: apache-manual-1.3.27-8.ent.ia64.rpm
Available from Red Hat Network: mod_ssl-2.8.12-4.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/apache-1.3.27-8.ent.src.rpm
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/mod_ssl-2.8.12-4.src.rpm

i386:
Available from Red Hat Network: apache-1.3.27-8.ent.i386.rpm Available from Red Hat Network: 
apache-devel-1.3.27-8.ent.i386.rpm
Available from Red Hat Network: apache-manual-1.3.27-8.ent.i386.rpm
Available from Red Hat Network: mod_ssl-2.8.12-4.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS: ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/apache-1.3.27-8.ent.src.rpm
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/mod_ssl-2.8.12-4.src.rpm

i386:
Available from Red Hat Network: apache-1.3.27-8.ent.i386.rpm Available from Red Hat Network: 
apache-devel-1.3.27-8.ent.i386.rpm
Available from Red Hat Network: apache-manual-1.3.27-8.ent.i386.rpm
Available from Red Hat Network: mod_ssl-2.8.12-4.i386.rpm



7. Verification:

MD5 sum                          Package Name
- - - --------------------------------------------------------------------------
6aaeefcc251c69d6e0f5b2f65a3d8d8b apache-1.3.27-8.ent.i386.rpm fd3824f33645c995f4051ea1c5443af8 apache-1.3.27-8.ent.ia64.rpm 907752ff24d8cad085b50668746b6126 apache-1.3.27-8.ent.src.rpm 51915eba50827a2c433cfbdc6b8cbba1 apache-devel-1.3.27-8.ent.i386.rpm
35fc4104a5c5b2980faff3beda26b020 apache-devel-1.3.27-8.ent.ia64.rpm
4cae1b4448aa91f86b151bfc4a1131bf apache-manual-1.3.27-8.ent.i386.rpm
2c5dd25e15b85b04858337f528ce3188 apache-manual-1.3.27-8.ent.ia64.rpm
72981573499af5b48f18bbf4a84db467 mod_ssl-2.8.12-4.i386.rpm 8cd07fc8dfb9e0b3869d1154581d05f3 mod_ssl-2.8.12-4.ia64.rpm d601db52fb2edfbe69dcf3bc953929b8 mod_ssl-2.8.12-4.src.rpm


These packages are GPG signed by Red Hat for security.  Our key is available from 
https://www.redhat.com/security/team/key.html

You can verify each package with the following command:
    
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or tampered with, 
examine only the md5sum with the following command:
    
    md5sum <filename>


8. References:

http://www.apacheweek.com/issues/04-06-11#security
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0488
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0492

9. Contact:

The Red Hat security contact is <secalert@xxxxxxxxxx>.  More contact details at 
https://www.redhat.com/security/team/contact.html

Copyright 2004 Red Hat, Inc.
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3.



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Hash: SHA1

===========================================================================
             

                     ESB-2004.0411 -- RHSA-2004:240-01
        Updated SquirrelMail package fixes multiple vulnerabilities
                               16 June 2004

===========================================================================

        

Product:                SquirrelMail
Publisher:              Red Hat
Operating System:       Red Hat Enterprise Linux AS version 3
                        Red Hat Desktop version 3
                        Red Hat Enterprise Linux ES version 3
                        Red Hat Enterprise Linux WS version 3
                        Linux variants
Impact:                 Execute Arbitrary Code/Commands
Access Required:        Remote
CVE Names:              CAN-2004-0519 CAN-2004-0520 CAN-2004-0521

- - --------------------------BEGIN INCLUDED TEXT--------------------

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

- - - ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated SquirrelMail package fixes multiple vulnerabilities
Advisory ID:       RHSA-2004:240-01
Issue date:        2004-06-14
Updated on:        2004-06-14
Product:           Red Hat Enterprise Linux
Keywords:          cross-site scripting XSS sql injection
Cross references:  
Obsoletes:         
CVE Names:         CAN-2004-0519 CAN-2004-0520 CAN-2004-0521
- - - ---------------------------------------------------------------------

1. Topic:

An updated SquirrelMail package that fixes several security vulnerabilities is now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - noarch
Red Hat Desktop version 3 - noarch
Red Hat Enterprise Linux ES version 3 - noarch
Red Hat Enterprise Linux WS version 3 - noarch

3. Problem description:

SquirrelMail is a webmail package written in PHP.  Multiple vulnerabilities have been 
found which affect the version of SquirrelMail shipped with Red Hat Enterprise Linux 3.

An SQL injection flaw was found in SquirrelMail version 1.4.2 and earlier. If 
SquirrelMail is configured to store user addressbooks in the database, a remote 
attacker could use this flaw to execute arbitrary SQL statements. The Common 
Vulnerabilities and Exposures project has assigned the name CAN-2004-0521 to this issue.

A number of cross-site scripting (XSS) flaws in SquirrelMail version 1.4.2 and 
earlier could allow remote attackers to execute script as other web users.  The
Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names 
CAN-2004-0519 and CAN-2004-0520 to these issues.

All users of SquirrelMail are advised to upgrade to the erratum package containing 
SquirrelMail version 1.4.3a which is not vulnerable to these issues.

4. Solution:

Before applying this update, make sure all previously released errata relevant to 
your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those RPMs 
which are currently installed will be updated.  Those RPMs which are not installed 
but included in the list will not be updated.  Note that you can also use wildcards 
(*.rpm) if your current directory *only* contains the desired RPMs.

Please note that this update is also available via Red Hat Network.  Many people 
find this an easier way to apply updates.  To use Red Hat Network, launch the 
Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs 
being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

122512 - CAN-2004-0519/20/21 XSS and SQL issues in Squirrelmail

6. RPMs required:

Red Hat Enterprise Linux AS version 3:

SRPMS: ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/squirrelmail-1.4.3-0.e3.1.src.rpm

noarch:
Available from Red Hat Network: squirrelmail-1.4.3-0.e3.1.noarch.rpm

Red Hat Desktop version 3:

SRPMS: ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/squirrelmail-1.4.3-0.e3.1.src.rpm

noarch:
Available from Red Hat Network: squirrelmail-1.4.3-0.e3.1.noarch.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS: ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/squirrelmail-1.4.3-0.e3.1.src.rpm

noarch:
Available from Red Hat Network: squirrelmail-1.4.3-0.e3.1.noarch.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS: ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/squirrelmail-1.4.3-0.e3.1.src.rpm

noarch:
Available from Red Hat Network: squirrelmail-1.4.3-0.e3.1.noarch.rpm



7. Verification:

MD5 sum                          Package Name
- - - --------------------------------------------------------------------------
fe78cd5ef4feb1aec5923dd2e6b3a5f9 squirrelmail-1.4.3-0.e3.1.noarch.rpm
081f186411150fea88f0533185f7bafb squirrelmail-1.4.3-0.e3.1.src.rpm


These packages are GPG signed by Red Hat for security.  Our key is available from 
https://www.redhat.com/security/team/key.html

You can verify each package with the following command:
    
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or tampered with, 
examine only the md5sum with the following command:
    
    md5sum <filename>


8. References:

http://marc.theaimsgroup.com/?l=squirrelmail-announce&m=108595407012256
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0519
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0520
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0521

9. Contact:

The Red Hat security contact is <secalert@xxxxxxxxxx>.  More contact details at 
https://www.redhat.com/security/team/contact.html

Copyright 2004 Red Hat, Inc.
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For additional information or assistance, please contact the HELP Desk by 
telephone or Not Protectively Marked information may be sent via 
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Tel: +44 (0) 20 7821 1330 Ext 4511
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Tel: +44 (0) 20 7821 1330 and follow the prompts

- ----------------------------------------------------------------------------------
UNIRAS wishes to acknowledge the contributions of Red Hat for the information 
contained in this Briefing. 
- ----------------------------------------------------------------------------------
This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
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Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
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members and the community at large. 
- ----------------------------------------------------------------------------------
<End of UNIRAS Briefing>

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