LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Security Week: December 22nd, 2014
Linux Advisory Watch: December 19th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
RedHat: unzip trojan vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
RedHat Linux A vulnerabilitiy in unzip version 5.50 and earlier allows attackers to overwrite arbitrary files during archive extraction by placing invalid (non-printable) characters between two "." characters.

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Updated unzip packages fix trojan vulnerability
Advisory ID:       RHSA-2003:199-01
Issue date:        2003-07-01
Updated on:        2003-07-01
Product:           Red Hat Linux
Keywords:          unzip control characters
Cross references:  
Obsoletes:         RHSA-2002:096
CVE Names:         CAN-2003-0282
- ---------------------------------------------------------------------

1. Topic:

Updated unzip packages resolving a vulnerability allowing arbitrary files
to be overwritten are now available.

2. Relevant releases/architectures:

Red Hat Linux 7.1 - i386
Red Hat Linux 7.2 - i386, ia64
Red Hat Linux 7.3 - i386
Red Hat Linux 8.0 - i386
Red Hat Linux 9 - i386

3. Problem description:

The unzip utility is used for manipulating archives, which are multiple
files stored inside of a single file.

A vulnerabilitiy in unzip version 5.50 and earlier allows attackers to
overwrite arbitrary files during archive extraction by placing invalid
(non-printable) characters between two "." characters.  These non-printable
characters are filtered, resulting in a ".." sequence.  The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2003-0282 to this issue.

This erratum includes a patch ensuring that non-printable characters do not
make it possible for a malicious .zip file to write to parent directories
unless the "-:" command line parameter is specified.

Users of unzip are advised to upgrade to these updated packages, which are
not vulnerable to this issue.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed  (http://bugzilla.Red Hat.com/bugzilla for more info):

97301 - vulnerability in unzip 5.50 allows malicious zip file to write to ../

6. RPMs required:

Red Hat Linux 7.1:

SRPMS: 
ftp://updates.Red Hat.com/7.1/en/os/SRPMS/unzip-5.50-11.src.rpm

i386: 
ftp://updates.Red Hat.com/7.1/en/os/i386/unzip-5.50-11.i386.rpm

Red Hat Linux 7.2:

SRPMS: 
ftp://updates.Red Hat.com/7.2/en/os/SRPMS/unzip-5.50-11.src.rpm

i386: 
ftp://updates.Red Hat.com/7.2/en/os/i386/unzip-5.50-11.i386.rpm

ia64: 
ftp://updates.Red Hat.com/7.2/en/os/ia64/unzip-5.50-11.ia64.rpm

Red Hat Linux 7.3:

SRPMS: 
ftp://updates.Red Hat.com/7.3/en/os/SRPMS/unzip-5.50-11.src.rpm

i386: 
ftp://updates.Red Hat.com/7.3/en/os/i386/unzip-5.50-11.i386.rpm

Red Hat Linux 8.0:

SRPMS: 
ftp://updates.Red Hat.com/8.0/en/os/SRPMS/unzip-5.50-12.src.rpm

i386: 
ftp://updates.Red Hat.com/8.0/en/os/i386/unzip-5.50-12.i386.rpm

Red Hat Linux 9:

SRPMS: 
ftp://updates.Red Hat.com/9/en/os/SRPMS/unzip-5.50-14.src.rpm

i386: 
ftp://updates.Red Hat.com/9/en/os/i386/unzip-5.50-14.i386.rpm



7. Verification:

MD5 sum                          Package Name
- --------------------------------------------------------------------------
627c65d2643152f360a4b7f8ebacf993 7.1/en/os/SRPMS/unzip-5.50-11.src.rpm
c37b3635f768ca248ef6486f38a4cfb1 7.1/en/os/i386/unzip-5.50-11.i386.rpm
627c65d2643152f360a4b7f8ebacf993 7.2/en/os/SRPMS/unzip-5.50-11.src.rpm
c37b3635f768ca248ef6486f38a4cfb1 7.2/en/os/i386/unzip-5.50-11.i386.rpm
e1cb9d0c5312667c601e3a04e160ea3c 7.2/en/os/ia64/unzip-5.50-11.ia64.rpm
627c65d2643152f360a4b7f8ebacf993 7.3/en/os/SRPMS/unzip-5.50-11.src.rpm
c37b3635f768ca248ef6486f38a4cfb1 7.3/en/os/i386/unzip-5.50-11.i386.rpm
b06d287ae9708615d9c8201addd84ceb 8.0/en/os/SRPMS/unzip-5.50-12.src.rpm
14e662c115aab0fd073602a2637c306a 8.0/en/os/i386/unzip-5.50-12.i386.rpm
da4837981a5363b178185c3d53bfe3f5 9/en/os/SRPMS/unzip-5.50-14.src.rpm
12b5697f11ad09959e9f51d570c37268 9/en/os/i386/unzip-5.50-14.i386.rpm


These packages are GPG signed by Red Hat for security.  Our key is
available from  http://www.Red Hat.com/security/keys.html

You can verify each package with the following command:
    
    rpm --checksig -v 

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    
    md5sum 


8. References:
 
http://marc.theaimsgroup.com/?l=bugtraq&m=105259038503175 
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0282

9. Contact:

The Red Hat security contact is <secalert@Red Hat.com>.  More contact
details at  http://www.Red Hat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.

 
< Prev   Next >
    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Weekend Edition
Report: U.S. planning “proportional response” to Sony hack, blamed on North Korea
Heartbleed, Shellshock, Tor and more: The 13 biggest security stories of 2014
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.