(Red Hat Issues Fix) Sudo Supplemental Group Privilege Error Lets Certain Local Users Gain Elevated Privileges
SecurityTracker Alert ID: 1021689|
SecurityTracker URL: http://securitytracker.com/id/1021689
(Links to External Site)
Date: Feb 5 2009
Root access via local system|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 1.6.9 - 1.6.9p19|
A vulnerability was reported in Sudo. A local user can obtain elevated privileges on the target system in certain cases.|
The software does not properly process supplemental group entries in the 'sudoers' configuration file. A local user that is permitted to run commands as any user of a group that the local user is also a member of can run certain commands with root privileges.
Harald Koenig reported this vulnerability.
A local user can obtain root privileges on the target system in certain cases.|
Red Hat has released a fix.|
The Red Hat advisory is available at:
Vendor URL: www.sudo.ws/sudo/alerts/group_vector.html (Links to External Site)
Access control error|
|Underlying OS: Linux (Red Hat Enterprise)|
|Underlying OS Comments: 5|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [RHSA-2009:0267-01] Moderate: sudo security update|
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Red Hat Security Advisory
Synopsis: Moderate: sudo security update
Advisory ID: RHSA-2009:0267-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-0267.html
Issue date: 2009-02-05
CVE Names: CVE-2009-0034
An updated sudo package to fix a security issue is now available for Red
Hat Enterprise Linux 5.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
The sudo (superuser do) utility allows system administrators to give
certain users the ability to run commands as root with logging.
A flaw was discovered in a way sudo handled group specifications in "run
as" lists in the sudoers configuration file. If sudo configuration allowed
a user to run commands as any user of some group and the user was also a
member of that group, sudo incorrectly allowed them to run defined commands
with the privileges of any system user. This gave the user unintended
Users of sudo should update to this updated package, which contains a
backported patch to resolve this issue.
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
481720 - CVE-2009-0034 sudo: incorrect handling of groups in Runas_User
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
Red Hat Enterprise Linux (v. 5 server):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2009 Red Hat, Inc.
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