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Test ID:1.3.6.1.4.1.25623.1.0.871048
Category:Red Hat Local Security Checks
Title:RedHat Update for sudo RHSA-2013:1353-01
Summary:The remote host is missing an update for the 'sudo'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'sudo'
package(s) announced via the referenced advisory.

Vulnerability Insight:
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 time stamp files. An attacker able
to run code as a local user and with the ability to control the system
clock could possibly gain additional privileges by running commands that
the victim user was allowed to run via sudo, without knowing the victim's
password. (CVE-2013-1775)

It was found that sudo did not properly validate the controlling terminal
device when the tty_tickets option was enabled in the /etc/sudoers file. An
attacker able to run code as a local user could possibly gain additional
privileges by running commands that the victim user was allowed to run via
sudo, without knowing the victim's password. (CVE-2013-1776, CVE-2013-2776)

This update also fixes the following bugs:

* Due to a bug in the cycle detection algorithm of the visudo utility,
visudo incorrectly evaluated certain alias definitions in the /etc/sudoers
file as cycles. Consequently, a warning message about undefined aliases
appeared. This bug has been fixed, /etc/sudoers is now parsed correctly by
visudo and the warning message no longer appears. (BZ#849679)

* Previously, the 'sudo -l' command did not parse the /etc/sudoers file
correctly if it contained an Active Directory (AD) group. The file was
parsed only up to the first AD group information and then the parsing
failed with the following message:

sudo: unable to cache group ADDOM\admingroup, already exists

With this update, the underlying code has been modified and 'sudo -l' now
parses /etc/sudoers containing AD groups correctly. (BZ#855836)

* Previously, the sudo utility did not escape the backslash characters
contained in user names properly. Consequently, if a system used sudo
integrated with LDAP or Active Directory (AD) as the primary authentication
mechanism, users were not able to authenticate on that system. With this
update, sudo has been modified to process LDAP and AD names correctly and
the authentication process now works as expected. (BZ#869287)

* Prior to this update, the 'visudo -s (strict)' command incorrectly parsed
certain alias definitions. Consequently, an error message was issued. The
bug has been fixed, and parsing errors no longer occur when using 'visudo

- -s'. (BZ#905624)

All sudo users are advised to upgrade to this updated package, which
contains backported patches to correct these issues.

Affected Software/OS:
sudo on Red Hat Enterprise Linux (v. 5 server)

Solution:
Please Install the Updated Packages.

CVSS Score:
6.9

CVSS Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2013-1775
http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
BugTraq ID: 58203
http://www.securityfocus.com/bid/58203
Debian Security Information: DSA-2642 (Google Search)
http://www.debian.org/security/2013/dsa-2642
http://www.openwall.com/lists/oss-security/2013/02/27/22
http://osvdb.org/90677
RedHat Security Advisories: RHSA-2013:1353
http://rhn.redhat.com/errata/RHSA-2013-1353.html
RedHat Security Advisories: RHSA-2013:1701
http://rhn.redhat.com/errata/RHSA-2013-1701.html
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2013&m=slackware-security.517440
SuSE Security Announcement: openSUSE-SU-2013:0495 (Google Search)
http://lists.opensuse.org/opensuse-updates/2013-03/msg00066.html
http://www.ubuntu.com/usn/USN-1754-1
Common Vulnerability Exposure (CVE) ID: CVE-2013-1776
BugTraq ID: 58207
http://www.securityfocus.com/bid/58207
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701839
https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/87023
https://bugzilla.redhat.com/show_bug.cgi?id=916365
http://www.openwall.com/lists/oss-security/2013/02/27/31
XForce ISS Database: sudo-ttytickets-sec-bypass(82453)
https://exchange.xforce.ibmcloud.com/vulnerabilities/82453
Common Vulnerability Exposure (CVE) ID: CVE-2013-2776
BugTraq ID: 62741
http://www.securityfocus.com/bid/62741
CopyrightCopyright (c) 2013 Greenbone Networks GmbH

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