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Category:   Application (Generic)  >   Taylor UUCP Vendors:   Taylor, Ian Lance
(Mandrake Issues Fix) Taylor UUCP Input Validation Flaw Allows Local Users to Elevate Privileges
SecurityTracker Alert ID:  1002438
SecurityTracker URL:  http://securitytracker.com/id/1002438
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Sep 21 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 for Mandrake versions 7.1, 7.2, 8.0, and Corporate Server 1.0.1. 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 (Mandriva/Mandrake)

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:  [Security Announce] MDKSA-2001:078 - uucp update


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

________________________________________________________________________

                Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           uucp
Date:                   September 21st, 2001
Advisory ID:            MDKSA-2001:078

Affected versions:      7.1, 7.2, 8.0, Corporate Server 1.0.1
________________________________________________________________________

Problem Description:

 Zen Parse discovered that an argument handling problem that exists in
 the uucp package can allow a local attacker to gain access to the uucp
 user or group.
________________________________________________________________________

References:

  http://www.securityfocus.com/archive/1/212892
________________________________________________________________________

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:
  rpm --checksig package.rpm
You can get the GPG public key of the Mandrake Linux Security Team at
  http://www.linux-mandrake.com/en/security/RPM-GPG-KEYS
If you use MandrakeUpdate, the verification of md5 checksum and GPG
signature is performed automatically for you.

Linux-Mandrake 7.1:
fa65ca8883349b9be0e6cf7db7dea76b  7.1/RPMS/uucp-1.06.1-14.1mdk.i586.rpm
e28726519e93e1980d40dab2f06483af  7.1/SRPMS/uucp-1.06.1-14.1mdk.src.rpm

Linux-Mandrake 7.2:
63dec090a832b711ff3a05577de6e375  7.2/RPMS/uucp-1.06.1-17.1mdk.i586.rpm
5e0b73597aaf0b0c731919e0e2608e2b  7.2/SRPMS/uucp-1.06.1-17.1mdk.src.rpm

Mandrake Linux 8.0:
1d285f9a496ae17aac3a43faaf93046a  8.0/RPMS/uucp-1.06.1-18.1mdk.i586.rpm
231f4436c3d4ba45190b6f00430a8b0d  8.0/SRPMS/uucp-1.06.1-18.1mdk.src.rpm

Mandrake Linux 8.0 (PPC):
9634b394fe43ab951969ab5088a071f3  ppc/8.0/RPMS/uucp-1.06.1-18.1mdk.ppc.rpm
519859d31a9a04d84d8090a6a4885431  ppc/8.0/SRPMS/uucp-1.06.1-18.1mdk.src.rpm

Corporate Server 1.0.1:
fa65ca8883349b9be0e6cf7db7dea76b  1.0.1/RPMS/uucp-1.06.1-14.1mdk.i586.rpm
e28726519e93e1980d40dab2f06483af  1.0.1/SRPMS/uucp-1.06.1-14.1mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):

________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".

You can download the updates directly from one of the mirror sites
listed at:

  http://www.linux-mandrake.com/en/ftp.php3.

Updated packages are available in the "updates/[ver]/RPMS/" directory.
For example, if you are looking for an updated RPM package for
Mandrake Linux 8.0, look for it in "updates/8.0/RPMS/".  Updated source
RPMs are available as well, but you generally do not need to download
them.

Please be aware that sometimes it takes the mirrors a few hours to
update.

You can view other security advisories for Mandrake Linux at:

  http://www.linux-mandrake.com/en/security/

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
________________________________________________________________________

Mandrake Linux has two security-related mailing list services that
anyone can subscribe to:

security-announce@linux-mandrake.com

  Mandrake Linux's security announcements mailing list.  Only
  announcements are sent to this list and it is read-only.

security-discuss@linux-mandrake.com

  Mandrake Linux's security discussion mailing list.  This list is open
  to anyone to discuss Mandrake Linux security specifically and Linux
  security in general.

To subscribe to either list, send a message to
  sympa@linux-mandrake.com
with "subscribe [listname]" in the body of the message.

To remove yourself from either list, send a message to
  sympa@linux-mandrake.com
with "unsubscribe [listname]" in the body of the message.

To get more information on either list, send a message to
  sympa@linux-mandrake.com
with "info [listname]" in the body of the message.

Optionally, you can use the web interface to subscribe to or unsubscribe
from either list:

  http://www.linux-mandrake.com/en/flists.php3#security
________________________________________________________________________

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security@linux-mandrake.com>


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