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Test ID:1.3.6.1.4.1.25623.1.0.56531
Category:Debian Local Security Checks
Title:Debian Security Advisory DSA 946-2 (sudo)
Summary:Debian Security Advisory DSA 946-2 (sudo)
Description:The remote host is missing an update to sudo
announced via advisory DSA 946-2.

The former correction to vulnerabilities in the sudo package worked
fine but were too strict for some environments. Therefore we have
reviewed the changes again and allowed some environment variables to
go back into the privileged execution environment. Hence, this
update.

The configuration option env_reset is now activated by default. It
will preserve only the environment variables HOME, LOGNAME, PATH,
SHELL, TERM, DISPLAY, XAUTHORITY, XAUTHORIZATION, LANG, LANGUAGE,
LC_*, and USER in addition to the separate SUDO_* variables.

For completeness please find below the original advisory text:

It has been discovered that sudo, a privileged program, that
provides limited super user privileges to specific users, passes
several environment variables to the program that runs with
elevated privileges. In the case of include paths (e.g. for Perl,
Python, Ruby or other scripting languages) this can cause arbitrary
code to be executed as privileged user if the attacker points to a
manipulated version of a system library.

This update alters the former behaviour of sudo and limits the
number of supported environment variables to LC_*, LANG, LANGUAGE
and TERM. Additional variables are only passed through when set as
env_check in /etc/sudoers, which might be required for some scripts
to continue to work.

For the old stable distribution (woody) this problem has been fixed in
version 1.6.6-1.6.

For the stable distribution (sarge) this problem has been fixed in
version 1.6.8p7-1.4.

For the unstable distribution (sid) the same behaviour will be
implemented soon.


Solution:
http://www.securityspace.com/smysecure/catid.html?in=DSA%20946-2
Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2005-4158
Debian Security Information: DSA-946 (Google Search)
http://www.debian.org/security/2006/dsa-946
http://www.mandriva.com/security/advisories?name=MDKSA-2005:234
http://www.mandriva.com/security/advisories?name=MDKSA-2006:159
SuSE Security Announcement: SUSE-SR:2006:002 (Google Search)
http://www.novell.com/linux/security/advisories/2006_02_sr.html
http://www.trustix.org/errata/2006/0002/
http://lists.ubuntu.com/archives/ubuntu-security-announce/2006-January/000266.html
BugTraq ID: 15394
http://www.securityfocus.com/bid/15394
http://www.vupen.com/english/advisories/2005/2386
http://securitytracker.com/alerts/2005/Nov/1015192.html
http://secunia.com/advisories/17534/
http://secunia.com/advisories/18156
http://secunia.com/advisories/18308
http://secunia.com/advisories/18549
http://secunia.com/advisories/18102
http://secunia.com/advisories/18558
http://secunia.com/advisories/18463
http://secunia.com/advisories/21692
XForce ISS Database: sudo-perl-execute-code(23102)
http://xforce.iss.net/xforce/xfdb/23102
Common Vulnerability Exposure (CVE) ID: CVE-2006-0151
http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.421822
http://www.trustix.org/errata/2006/0010
http://www.ubuntulinux.org/support/documentation/usn/usn-235-2
BugTraq ID: 16184
http://www.securityfocus.com/bid/16184
http://secunia.com/advisories/18358
http://secunia.com/advisories/18363
http://secunia.com/advisories/18906
http://secunia.com/advisories/19016
CopyrightCopyright (c) 2006 E-Soft Inc. http://www.securityspace.com

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