AusCERT - ESB-2010.0538 - [UNIX/Linux][RedHat] sudo: Increased privileges

HOME
About AusCERT
Membership
PKI Services
Training
Publications
Sec. Bulletins
Conferences
News & Media
Services
Web Log
Site Map
Site Help
Member login
ESB-2010.0538 - [UNIX/Linux][RedHat] sudo: Increased privileges - Existing account
Date: 16 June 2010
References: ESB-2010.0545

Click here for printable version
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.0538
                      Moderate: sudo security update
                               16 June 2010

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           sudo
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux WS/Desktop 5
                   Red Hat Enterprise Linux Server 5
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Increased Privileges           -- Existing Account
                   Provide Misleading Information -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-1646  

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2010-0475.html

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Red Hat. It is recommended that administrators
         running sudo check for an updated version of the software for their
         operating system.

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

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

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: sudo security update
Advisory ID:       RHSA-2010:0475-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0475.html
Issue date:        2010-06-15
CVE Names:         CVE-2010-1646 
=====================================================================

1. Summary:

An updated sudo package that fixes one security issue is now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

The sudo (superuser do) utility allows system administrators to give
certain users the ability to run commands as root.

A flaw was found in the way sudo handled the presence of duplicated
environment variables. A local user authorized to run commands using sudo
could use this flaw to set additional values for the environment variables
set by sudo, which could result in those values being used by the executed
command instead of the values set by sudo. This could possibly lead to
certain intended restrictions being bypassed, such as the secure_path
setting. (CVE-2010-1646)

Red Hat would like to thank Anders Kaseorg and Evan Broder of Ksplice, Inc.
for responsibly reporting this issue.

Users of sudo should upgrade to this updated package, which contains a
backported patch to correct this issue.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

598154 - CVE-2010-1646 sudo: insufficient environment sanitization issue

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/sudo-1.7.2p1-7.el5_5.src.rpm

i386:
sudo-1.7.2p1-7.el5_5.i386.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.i386.rpm

x86_64:
sudo-1.7.2p1-7.el5_5.x86_64.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/sudo-1.7.2p1-7.el5_5.src.rpm

i386:
sudo-1.7.2p1-7.el5_5.i386.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.i386.rpm

ia64:
sudo-1.7.2p1-7.el5_5.ia64.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.ia64.rpm

ppc:
sudo-1.7.2p1-7.el5_5.ppc.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.ppc.rpm

s390x:
sudo-1.7.2p1-7.el5_5.s390x.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.s390x.rpm

x86_64:
sudo-1.7.2p1-7.el5_5.x86_64.rpm
sudo-debuginfo-1.7.2p1-7.el5_5.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-1646.html
http://www.redhat.com/security/updates/classification/#moderate
http://www.sudo.ws/sudo/alerts/secure_path.html

8. Contact:

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

Copyright 2010 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFMGBXsXlSAg2UNWIIRAnukAJ0UoCVPSqzBoJY7roEO7U67yMxvOACgipz2
S8841RyUm0eSGVXz2tJv6d8=
=ermd
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iD8DBQFMGCYn/iFOrG6YcBERAv3yAKDDZueKVok4zZeFoGiCSs+x7pryAgCffc6M
bjcDraR2mA8eC1P5zHg5Siw=
=EQl2
-----END PGP SIGNATURE-----