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UNIRAS Brief - 566/04 - Fedora Legacy Update Advisory - FLSA:2102 - Updated samba resolves security



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 566/04 dated 14.10.04  Time: 14:45  
  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
=====

Fedora Legacy Update Advisory - FLSA:2102 - Updated samba resolves security 
vulnerabilities

Detail
====== 

Karol Wiesek discovered an input validation issue in Samba prior to 3.0.6. An 
authenticated user could send a carefully crafted request to the Samba server, 
which would allow access to files outside of the configured file share.



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               Fedora Legacy Update Advisory

Synopsis:          Updated samba resolves security vulnerabilities
Advisory ID:       FLSA:2102
Issue date:        2004-10-13
Product:           Red Hat Linux
Keywords:          Security
Cross references:  https://bugzilla.fedora.us/show_bug.cgi?id=2102
CVE Names:         CAN-2004-0815
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1. Topic:

Updated samba packages that fix an input validation vulnerability are now available.

Samba provides file and printer sharing services to SMB/CIFS clients.

2. Relevant releases/architectures:

Red Hat Linux 7.3 - i386
Red Hat Linux 9 - i386

3. Problem description:

Karol Wiesek discovered an input validation issue in Samba prior to 3.0.6. An 
authenticated user could send a carefully crafted request to the Samba server, 
which would allow access to files outside of the configured file share. Note: 
Such files would have to be readable by the account used for the connection. 
The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0815 to this issue.

Users of Samba should upgrade to these updated packages, which contain an upgrade 
to Samba-2.2.12, which is not vulnerable to this issue.

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 yum and apt.  Many people find 
this an easier way to apply updates.  To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the appropriate RPMs 
being upgraded on your system.  This assumes that you have yum or apt-get 
configured for obtaining Fedora Legacy content. Please visit 
http://www.fedoralegacy.org/docs/ for directions on how to configure yum and apt-get.

5. Bug IDs fixed:

http://bugzilla.fedora.us - 2102 - 
CAN-2004-0815 samba Potential Arbitrary File Access

6. RPMs required:

Red Hat Linux 7.3:

SRPM: http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/samba-2.2.12-0.73.2.legacy.src.rpm

i386: http://download.fedoralegacy.org/redhat/7.3/updates/i386/samba-2.2.12-0.73.2.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/7.3/updates/i386/samba-client-2.2.12-0.73.2.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/7.3/updates/i386/samba-common-2.2.12-0.73.2.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/7.3/updates/i386/samba-swat-2.2.12-0.73.2.legacy.i386.rpm

Red Hat Linux 9:

SRPM: http://download.fedoralegacy.org/redhat/9/updates/SRPMS/samba-2.2.12-0.90.1.legacy.src.rpm

i386: 
http://download.fedoralegacy.org/redhat/9/updates/i386/samba-2.2.12-0.90.1.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/9/updates/i386/samba-client-2.2.12-0.90.1.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/9/updates/i386/samba-common-2.2.12-0.90.1.legacy.i386.rpm
http://download.fedoralegacy.org/redhat/9/updates/i386/samba-swat-2.2.12-0.90.1.legacy.i386.rpm

7. Verification:

SHA1 sum                                 Package Name
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664447fbbf1371174b601099d18102023537ecbf  7.3/updates/SRPMS/samba-2.2.12-0.73.2.legacy.src.rpm
ab34e621cdaa5ad567276244eb2ed2234c418890  7.3/updates/i386/samba-2.2.12-0.73.2.legacy.i386.rpm
aaae87969ae3287e432503cee8fbcb83525d020e  7.3/updates/i386/samba-client-2.2.12-0.73.2.legacy.i386.rpm
728d7f6d68dc837fd874ac870e5d2241e2514a6d  7.3/updates/i386/samba-common-2.2.12-0.73.2.legacy.i386.rpm
3cb01bb47a5fa55151637050f01769898b7dc89c  7.3/updates/i386/samba-swat-2.2.12-0.73.2.legacy.i386.rpm
2968358eb51a4342b520f5494a4013643ba73e1b  9/updates/SRPMS/samba-2.2.12-0.90.1.legacy.src.rpm
dcafbbcb96a0848e8b4017bdf1745c275681db35  9/updates/i386/samba-2.2.12-0.90.1.legacy.i386.rpm
e7fe4b9425d535768fc17464f7879dd1f048a8b2  9/updates/i386/samba-client-2.2.12-0.90.1.legacy.i386.rpm
f590e48b6a9ad6841f7ea96070d08c8151ae12d7  9/updates/i386/samba-common-2.2.12-0.90.1.legacy.i386.rpm
75fbf38b5381ee7cf9b91c5723aa8d66f8e92fbc  9/updates/i386/samba-swat-2.2.12-0.90.1.legacy.i386.rpm

These packages are GPG signed by Fedora Legacy for security.  Our key is available from 
http://www.fedoralegacy org/about/security.php

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 sha1sum with the following command:

    sha1sum <filename>

8. References:

http://us4.samba.org/samba/news/#security_2.2.12
http://rhn.redhat.com/errata/RHSA-2004-498.html

9. Contact:

The Fedora Legacy security contact is <secnotice@xxxxxxxxxxxxxxxx>. 
More project details at http://www.fedoralegacy.org

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For additional information or assistance, please contact the HELP Desk by 
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UNIRAS wishes to acknowledge the contributions of Fedora Legacy for the information 
contained in this Briefing. 
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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 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

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 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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