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Category:   Application (Generic)  >   Taylor UUCP Vendors:   Taylor, Ian Lance
(Conectiva Issues Fix) Taylor UUCP Input Validation Flaw Allows Local Users to Elevate Privileges
SecurityTracker Alert ID:  1002399
SecurityTracker URL:  http://securitytracker.com/id/1002399
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Sep 12 2001
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): uucp-1.06.1-25
Description:   A vulnerability was reported in Taylor UUCP. An argument handling flaw in a component of the Taylor UUCP package allows local users to obtain 'uucp' user and group privileges.

The uuxqt module (the UUCP execution daemon), which is designed to remove arguments that appear dangerous before execution, reportedly fails to remove long arguments. This allows a local user to cause cammands to be executed on the system with uucp privileges.

On OpenBSD 2.8 (and probably others), this reportedly indirectly allows root compromise. A local user can exploit the vulnerability to overwrite the uucp owned program /usr/bin/uustat, where arbitrary commands may be executed as part of the /etc/daily crontab script.

On Redhat 7.0 (and probably others), this reportedly indirectly allows a local user to create empty files as root execute commands as if logged in at the console.

Additional demonstration exploit information is provided in the Source Message.

Impact:   A local user can cause arbitrary commands to be executed on the system with 'uucp' user and group privileges, giving the local user 'uucp' level permissions on the system.
Solution:   The vendor has released a fix. See the Source Message for the vendor's advisory containing directions on how to obtain the appropriate fix.
Vendor URL:  www.airs.com/ian/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Conectiva)

Message History:   This archive entry is a follow-up to the message listed below.
Sep 8 2001 Taylor UUCP Input Validation Flaw Allows Local Users to Elevate Privileges



 Source Message Contents

Subject:  [conectiva-updates] [CLA-2001:425] Conectiva Linux Security Announcement - uucp


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT 
- --------------------------------------------------------------------------

PACKAGE   : uucp
SUMMARY   : Local vulnerability in the uucp package
DATE      : 2001-09-11 18:31:00
ID        : CLA-2001:425
RELEVANT
RELEASES  : 4.0, 4.0es, 4.1, 4.2, 5.0, prg graficos, ecommerce, 5.1, 6.0, 7.0

- -------------------------------------------------------------------------

DESCRIPTION
 UUCP is a Unix to Unix transfer mechanism. It is used primarily
 for remote sites to download and upload email and news files to local
 machines.
 
 zen-parse found[1] a vulnerability in the command-line argument
 handling of uucp which can be exploited by a local user to obtain
 uid/gid uucp.
 
 REFERENCES
 1. http://www.securityfocus.com/archive/1/212892


SOLUTION
 All users with the uucp package installed should upgrade.


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/4.0/i386/uucp-1.06.1-21U40_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.0/SRPMS/uucp-1.06.1-21U40_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.0es/i386/uucp-1.06.1-21U40_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.0es/SRPMS/uucp-1.06.1-21U41_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.1/i386/uucp-1.06.1-21U41_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.1/SRPMS/uucp-1.06.1-21U41_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.2/i386/uucp-1.06.1-21U42_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.2/SRPMS/uucp-1.06.1-21U42_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/uucp-1.06.1-22U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/uucp-1.06.1-22U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/uucp-1.06.1-23U51_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/uucp-1.06.1-23U51_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/i386/uucp-1.06.2-4U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/uucp-1.06.2-4U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/i386/uucp-1.06.2-6U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/i386/uucp-cu-1.06.2-6U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/i386/uucp-doc-1.06.2-6U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/uucp-1.06.2-6U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/uucp-1.06.1-22U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/uucp-1.06.1-22U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/uucp-1.06.1-22U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/uucp-1.06.1-22U50_1cl.src.rpm


ADDITIONAL INSTRUCTIONS
 Users of Conectiva Linux version 6.0 or higher may use apt to perform 
 upgrades of RPM packages:
 - add the following line to /etc/apt/sources.list if it is not there yet
   (you may also use linuxconf to do this):

 rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

 - run:                 apt-get update
 - after that, execute: apt-get upgrade

 Detailed instructions reagarding the use of apt and upgrade examples 
 can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en


- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at 
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

- -------------------------------------------------------------------------
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE7noLr42jd0JmAcZARAkvmAKDxwPClbWCbgBzyLIJCFO3EKws1cwCgt9iQ
yU7F/esl3d2BD67M5jDHc+g=
=DROK
-----END PGP SIGNATURE-----



 
 


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