Date: 21 April 2010
References: ESB-2010.0204.2 ESB-2010.0211 ESB-2010.0384 ESB-2010.0563
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AUSCERT External Security Bulletin Redistribution
Moderate: sudo security update
21 April 2010
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Red Hat Enterprise Linux WS/Desktop 5
Impact/Access: Root Compromise -- Existing Account
CVE Names: CVE-2010-1163 CVE-2010-0426
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Red Hat Security Advisory
Synopsis: Moderate: sudo security update
Advisory ID: RHSA-2010:0361-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0361.html
Issue date: 2010-04-20
CVE Names: CVE-2010-1163
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
The sudo (superuser do) utility allows system administrators to give
certain users the ability to run commands as root.
The RHBA-2010:0212 sudo update released as part of Red Hat Enterprise Linux
5.5 added the ability to change the value of the ignore_dot option in the
"/etc/sudoers" configuration file. This ability introduced a regression in
the upstream fix for CVE-2010-0426. In configurations where the ignore_dot
option was set to off (the default is on for the Red Hat Enterprise Linux 5
sudo package), a local user authorized to use the sudoedit pseudo-command
could possibly run arbitrary commands with the privileges of the users
sudoedit was authorized to run as. (CVE-2010-1163)
Red Hat would like to thank Todd C. Miller, the upstream sudo maintainer,
for responsibly reporting this issue. Upstream acknowledges Valerio
Costamagna as the original reporter.
Users of sudo should upgrade to this updated package, which contains a
backported patch to correct this issue.
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
5. Bugs fixed (http://bugzilla.redhat.com/):
580441 - CVE-2010-1163 sudo: incomplete fix for the sudoedit privilege escalation issue CVE-2010-0426
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 2010 Red Hat, Inc.
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