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(Vendor Issues Fix) Re: Sudo Utility Has Heap Overflow That May Let Local Users Execute Arbitrary Code with Root Privileges
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SecurityTracker Alert ID: 1004155
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CVE Reference: CVE-2002-0184
(Links to External Site)
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Updated: Nov 19 2003
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Original Entry Date: Apr 25 2002
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Impact: Execution of arbitrary code via local system, Root access via local system
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 1.6.5p2 and prior
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Description: A vulnerability has been reported in the sudo utility. A local user may be able to obtain root privileges.
Global InterSec reported an off-by-five heap overflow in 'sudo'. A local user can apparently call sudo with a specially formatted
argument for the -p command line option to trigger the overflow. It is reported that sudo may not correctly allocate memory when
parsing the '%h' (hostname) or '%u' (username) strings in the argument in some situations. A local user could potentially trigger
the overflow and execute arbitrary code with root privileges.
The exact nature of the conditions required to exploit this flaw
were not provided. However, it is reported that the compile-time options and the length of the hostname may affect whether the
application is vulnerable or not.
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Impact: A local user may be able to execute arbitrary code with root privileges in certain situations.
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Solution: The vendor has issued a fixed version (1.6.6), available at:
ftp://ftp.sudo.ws/pub/sudo/sudo-1.6.6.tar.gz
A patch is also available at:
http://www.sudo.ws/pipermail/sudo-announce/2002-April/000020.html
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Vendor URL: www.courtesan.com/sudo/ (Links to External Site)
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Cause: Boundary error
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Underlying OS: Linux (Any), UNIX (Any)
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Reported By: Jonas Eriksson <je@sekure.net>
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Thu, 25 Apr 2002 19:08:09 +0200 (CEST)
From: Jonas Eriksson <je@sekure.net>
Subject: Sudo version 1.6.6 now available (fwd)
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---------- Forwarded message ----------
Date: Thu, 25 Apr 2002 10:34:13 -0600
From: Todd C. Miller <Todd.Miller@courtesan.com>
To: sudo-announce@courtesan.com
Subject: Sudo version 1.6.6 now available
Sudo version 1.6.6 is now available (ftp sites listed at the end).
Changes since Sudo 1.6.5p2:
o Fixed compilation problem on HP-UX 9.x.
o Moved call to endpwent() and added a call to endgrent().
o Fixed a warning conflicting declaration of VOID with AFS.
o Fixed a security hole in prompt rewriting found by Global InterSec.
Please note that Sudo 1.6.6 fixes a security hole present in sudo
versions 1.5.7 - 1.6.5p2. Please see:
http://www.sudo.ws/pipermail/sudo-announce/2002-April/000020.html
http://www.globalintersec.com/adv/sudo-2002041701.txt
for details.
sudo 1.6.6 distribution:
ftp://ftp.sudo.ws/pub/sudo/sudo-1.6.6.tar.gz
Master WWW site:
http://www.sudo.ws/sudo/dist/
Mirrors (not yet updated)
WWW Mirrors:
http://sudo.stikman.com/ (Los Angeles, California, USA)
http://mirage.informationwave.net/sudo/ (Fanwood, New Jersey, USA)
http://sudo.planetmirror.com/ (Australia)
http://sudo.cdu.elektra.ru/ (Russia)
Master FTP sites:
ftp.sudo.ws:/pub/sudo/
ftp.cs.colorado.edu:/pub/sudo/
FTP Mirrors:
ftp.cs.colorado.edu:/pub/sudo/ (Boulder, Colorado, USA)
ftp.stikman.com:/pub/sudo/ (Los Angeles, California, USA)
ftp.uu.net:/pub/security/sudo/ (Falls Church, Virginia, USA)
ftp.tux.org:/pub/security/sudo/ (Beltsville, Maryland, USA)
ftp.cerias.purdue.edu:/pub/tools/unix/sysutils/sudo/ (West Lafayette, Indiana, USA)
ftp.uwsg.indiana.edu:/pub/sudo/ (Bloomington, Indiana, USA)
sudobash.com:/pub/sudo/ (Ypsilanti, Michigan, USA)
ftp.tamu.edu:/pub/mirrors/ftp.courtesan.com/ (College Station, Texas, USA)
ftp.rge.com:/pub/admin/sudo/ (Rochester, New York, USA)
mirage.informationwave.net:/sudo/ (Fanwood, New Jersey, USA)
ftp.wiretapped.net:/pub/security/host-security/sudo/ (Australia)
ftp.tuwien.ac.at:/utils/admin-tools/sudo/ (Austria)
sunsite.ualberta.ca:/pub/Mirror/sudo/ (Alberta, Canada)
ftp.csc.cuhk.edu.hk:/pub/packages/unix-tools/sudo/ (Hong Kong, China)
ftp.eunet.cz:/pub/security/sudo/ (Czechoslovakia)
ftp.umds.ac.uk:/pub/sudo/ (Great Britain)
ftp.tvi.tut.fi:/pub/security/unix/sudo/ (Finland)
ftp.lps.ens.fr:/pub/software/sudo/ (France)
ftp.crihan.fr:/pub/security/sudo/ (France)
ftp.rz.uni-osnabrueck.de:/pub/unix/security/sudo/ (Germany)
ftp.win.ne.jp:/pub/misc/sudo/ (Japan)
ftp.st.ryukoku.ac.jp:/pub/security/tool/sudo/ (Japan)
ftp.eos.hokudai.ac.jp:/pub/misc/sudo/ (Japan)
ftp.tokyonet.ad.jp:/pub/security/sudo/ (Japan)
ftp.kobe-u.ac.jp:/pub/util/security/tool/sudo/ (Japan)
ftp.cin.nihon-u.ac.jp:/pub/util/sudo/ (Japan)
ftp.fujitsu.co.jp:/pub/misc/sudo/ (Japan)
core.ring.gr.jp:/pub/misc/sudo/ (Japan)
ftp.ring.gr.jp:/pub/misc/sudo/ (Japan)
ftp.ayamura.org:/pub/sudo/ (Japan)
ftp.iphil.net:/pub/sudo/ (Makati City, Philippines)
ftp.icm.edu.pl:/vol/wojsyl5/sudo/ (Poland)
ftp.assist.ro:/pub/mirrors/ftp.courtesan.com/pub/sudo/ (Romania)
ftp.sai.msu.su:/pub/unix/security/ (Russia)
ftp.cdu.elektra.ru:/pub/unix/security/sudo/ (Russia)
ftp.mc.hik.se:/pub/unix/security/sudo/ (Sweden)
ftp.sekure.net:/pub/sudo/ (Sweden)
ftp.edu.tw:/UNIX/sudo/ (Taiwan)
ftp.comu.edu.tr:/pub/linux/prog/sudo/ (Turkey)
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