__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
___ __ __ _ ___
/ | /_\ /
\___ __|__ / \ \___
__________________________________________________________
INFORMATION BULLETIN
Sun Solaris at(1) Command Vulnerability
[Sun(sm) Alert Notification 50161]
April 3, 2003 03:00 GMT Number N-070
______________________________________________________________________________
PROBLEM: Race condition and argument handling vulnerabilites exist in
the at(1) command, which may allow a user to remove any file on
the system.
PLATFORM: * Solaris 2.6
* Solaris 7
* Solaris 8
* Solaris 9
DAMAGE: If exploited, a local unprivileged user may be able to remove
any file on the system.
SOLUTION: Apply patch or workaround.
______________________________________________________________________________
VULNERABILITY The risk is MEDIUM. In order to exploit this vulnerability, an
ASSESSMENT: attacker would need a legitimate account and permission on the
target system to delete files.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-070.shtml
ORIGINAL BULLETIN:
http://www.sunsolve.sun.com/pub-cgi/
retrieve.pl?doc=fsalert%2F50161&zone_32=category%3Asecurity
______________________________________________________________________________
[***** Start Sun(sm) Alert Notification 50161 *****]
Sun(sm) Alert Notification
Sun Alert ID: 50161
Synopsis: Security Vulnerability with the at(1) Command on Solaris
Category: Security
Product: Solaris
BugIDs: 4776480
Avoidance: Patch
State: Resolved
Date Released: 30-Jan-2003, 31-Mar-2003
Date Closed: 31-Mar-2003
Date Modified: 31-Mar-2003
1. Impact
A local unprivileged user may be able to remove any file on the system due to
a security vulnerability in the at(1) command.
Sun acknowledges with thanks, Wojciech Purczynski of iSEC Security Research,
for bringing this issue to our attention.
This issue is described in an iSEC Security Research advisory
(see http://isec.pl/vulnerabilities/isec-0008-sun-at.txt).
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
Solaris 2.6 without patch 105181-34
Solaris 7 without patch 108319-03
Solaris 8 without patches 109007-09 and 108875-13
Solaris 9 without patch 114135-01
x86 Platform
Solaris 2.6 without patch 105182-34
Solaris 7 without patch 108320-03
Solaris 8 without patches 109008-09 and 108876-13
Solaris 9 without patch 114136-01
Notes: Solaris 2.5.1 will not be evaluated regarding a potential impact of
the issue described in this Sun Alert document.
The Solaris 8 cron/at patches 109007-09 and 109008-09 require the
libbsm/c2audit patches 108875-13 and 108876-13 respectively for the correct
functioning of the crontab(1) command. Future revisions of the Solaris 8
cron/at patches will contain the libbsm/c2audit binaries and will not require
the installation of the libbsm/c2audit patches.
3. Symptoms
There are no predictable symptoms that would show the described issue has
been exploited, as it depends on what file or files were deleted.
Solution Summary Top
4. Relief/Workaround
To work around the described issue, the set-user-ID bit can be removed from the
at(1) command. However, once the set-user-ID bit is removed the "at" command
will no longer function. As root do the following:
# chmod u-s /usr/bin/at
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
Solaris 2.6 with patch 105181-34 or later
Solaris 7 with patch 108319-03 or later
Solaris 8 with patch 109007-09 and 108875-13 or later
Solaris 9 with patch 114135-01 or later
x86 Platform
Solaris 2.6 with patch 105182-34 or later
Solaris 7 with patch 108320-03 or later
Solaris 8 with patch 109008-09 and 108876-13 or later
Solaris 9 with patch 114136-01 or later
Change History
31-Mar-2003:
State: Resolved
Updated Contributing Factors and Resolution sections
This Sun Alert notification is being provided to you on an "AS IS" basis.
This Sun Alert notification may contain information provided by third
parties. The issues described in this Sun Alert notification may or may not
impact your system(s). Sun makes no representations, warranties, or
guarantees as to the information contained herein. ANY AND ALL WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT,
ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN
SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE,
OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE
INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun
proprietary and confidential information. It is being provided to you
pursuant to the provisions of your agreement to purchase services from
Sun, or, if you do not have such an agreement, th! e Sun.com Terms of Use.
This Sun Alert notification may only be used for the purposes contemplated
by these agreements.
Copyright 2000-2003 Sun Microsystems, Inc., 4150 Network Circle,
Santa Clara, CA 95054 U.S.A. All rights reserved.
[***** End Sun(sm) Alert Notification 50161 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. and
iSec for the information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.
CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
Voice: +1 925-422-8193 (7x24)
FAX: +1 925-423-8002
STU-III: +1 925-423-2604
E-mail: ciac@ciac.org
Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.
World Wide Web: http://www.ciac.org/
Anonymous FTP: ftp.ciac.org
PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins. If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.
This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.
LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)
N-061: OpenSSL Timing-based Attacks on RSA Keys
N-062: MIT krb5 Buffer overrun and underrun in Principal Name Handling
N-063: Microsoft Windows Script Engine Vulnerability
N-064: Sun Buffer Overflow in Web Connector Module of Application Server
N-065: Multiple Vulnerabilities in Lotus Notes and Domino
N-066: RealPlayer PNG Deflate Heap Corruption Vulnerability
N-067: Sendmail MTA Buffer Overflow Vulnerability
N-068: Sun Solaris Buffer Overflow in lpq(1B) Command
N-069: Sun Solaris newtask(1) Command Vulnerability
TUCoPS is optimized to look best in Firefox® on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2024 AOH
