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TUCoPS :: Linux :: Apps N-Z :: n-041.txt

Sun Linux unzip GNU tar Command (CIACSTxt n)-




             __________________________________________________________

                       The U.S. Department of Energy
                   Computer Incident Advisory Capability
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___
             __________________________________________________________

                             INFORMATION BULLETIN

          Sun Linux Vulnerabilities in "unzip" and GNU "tar" Commands
                             [Sun Alert ID: 47800 ]

February 7, 2003 13:00 GMT                                        Number N-041
______________________________________________________________________________
PROBLEM:       Vulnerabilities have been identified in "unzip" and GNU "tar" 
               Commands. Directory traversal vulnerability in Info-ZIP UnZip 
               5.42 and earlier allows attackers to overwrite arbitrary files 
               during archive extraction via a .. (dot dot) in an extracted 
               filename.
PLATFORM:      Sun Linus
                 Sun Linux 5.0 with tar 1.13.19-6 
                 Sun Linux 5.0 with unzip version 5.42 or earlier 
                 Sun Linux 5.0 with GNU tar 1.13.19 or earlier 
               Cobalt
                 Qube 3 
                 RaQ 3 
                 RaQ 4 
                 RaQ 550 
                 RaQ XTR 
DAMAGE:        A local unprivileged user may be able to gain unauthorized root 
               access and/or overwrite any file on the system. 
SOLUTION:      Apply available patches, upgrades, or workarounds. 
______________________________________________________________________________
VULNERABILITY  The risk is MEDIUM. There are no reliable symptoms that would
ASSESSMENT:    show the described issue has been exploited to gain unauthorized 
               root access to a system. 
______________________________________________________________________________
LINKS: 
 CIAC BULLETIN:      http://www.ciac.org/ciac/bulletins/n-041.shtml 
 ORIGINAL BULLETIN:                                                           
                     http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%
                     2F47800&zone_32=category%3Asecurity 
 PATCHES:            http://sunsolve.sun.com/patches/linux/security.html 
                     http://sunsolve.sun.com/patches/cobalt/ 
______________________________________________________________________________
[***** Start Sun Alert ID: 47800  *****]

Sun Alert ID: 47800 
Synopsis: Sun Linux Vulnerabilities in "unzip" and GNU "tar" Commands 
Category: Security  
Product: Sun Linux 
BugIDs: 16170 
Avoidance: Workaround, Patch, Upgrade 
State: Resolved 
Date Released: 10-Oct-2002, 04-Feb-2003 
Date Closed: 04-Feb-2003 
Date Modified: 04-Feb-2003 


1. Impact 

A local unprivileged user may be able to gain unauthorized root access and/or 
overwrite any file on the system if a privileged user extracts a tar or zip archive 
which contains a ".." (dot dot) in the filename. 


For more information see: 

  http://online.securityfocus.com/archive/1/196445 
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1267 
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1268 
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-1269 
  http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0399 


2. Contributing Factors 

This issue can occur in the following releases: 

Sun Linux 

  Sun Linux 5.0 with tar 1.13.19-6 
  Sun Linux 5.0 with unzip version 5.42 or earlier 
  Sun Linux 5.0 with GNU tar 1.13.19 or earlier 

Note: Sun Linux 5.0 is currently shipped with the Sun LX50 Server. 


Cobalt 

  Qube 3 
  RaQ 3 
  RaQ 4 
  RaQ 550 
  RaQ XTR 


3. Symptoms 

There are no reliable symptoms that would show the described issue has been exploited 
to gain unauthorized root access to a system. 


Solution Summary Top 

4. Relief/Workaround 

Verify zip or tar archives using the options as follows: 

	tar -tvf <tarfile>.tar                                                      
Or for compressed files: 

	tar -tvzf <tarfile>.tar.<gz|zip|Z|z>                                                 
Or for zip files: 

	unzip -l <zipfile>.zip                                                      
If multiple "../" entries are not present, the archive is safe. 


5. Resolution 

This issue is addressed in the following releases: 

Sun Linux 

  Sun Linux 5.0 tar-1.13.25-4.7.1.i386.rpm 
  Sun Linux 5.0 unzip-5.50-2.i386.rpm 
  Sun Linux 5.0 tar-1.13.25-4.7.1.src.rpm 
  Sun Linus 5.0 unzip-5.50-2.src.rpm 

The above patches are available at: 
http://sunsolve.sun.com/patches/linux/security.html 

Cobalt 

  Qube3-All-Security-4.0.1-16170.pkg 
  RaQ3-All-Security-5.0.1-16170.pkg 
  RaQ4-All-Security-2.0.2-16170.pkg 
  RaQ550-All-Security-0.0.1-16170.pkg 
  RaQXTR-All-Security-1.0.1-16170.pkg 

The above patches are available at http://sunsolve.sun.com/patches/cobalt/. 

Change History 

04-Feb-2003: 

State Resolved (and Closed) 
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, the 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 Alert ID: 47800  *****]
_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of Sun Microsystems 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
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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.

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