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Category:   Application (Generic)  >   system-config-printer Vendors:   Waugh, Tim
system-config-printer 'pysmb.py' NetBIOS Parameter Validation Flaw Lets Remote Users Execute Arbitrary Commands
SecurityTracker Alert ID:  1025967
SecurityTracker URL:  http://securitytracker.com/id/1025967
CVE Reference:   CVE-2011-2899   (Links to External Site)
Date:  Aug 23 2011
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in system-config-printer. A remote user can execute arbitrary commands on the target system.

A remote SMB server on the local network can send a specially crafted NetBIOS and workgroup name to cause the target system to execute arbitrary commands when 'pysmb.py' is run on the target system. The code will run with the privileges of the user running system-config-printer.

Impact:   A remote user can execute arbitrary commands on the target system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2011-1196.html

Vendor URL:  cyberelk.net/tim/software/system-config-printer/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  4, 5

Message History:   None.


 Source Message Contents

Subject:  [RHSA-2011:1196-01] Moderate: system-config-printer security update

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

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: system-config-printer security update
Advisory ID:       RHSA-2011:1196-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-1196.html
Issue date:        2011-08-23
CVE Names:         CVE-2011-2899 
=====================================================================

1. Summary:

Updated system-config-printer packages that fix one security issue are now
available for Red Hat Enterprise Linux 4 and 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Description:

system-config-printer is a print queue configuration tool with a graphical
user interface.

It was found that system-config-printer did not properly sanitize NetBIOS
and workgroup names when searching for network printers. A remote attacker
could use this flaw to execute arbitrary code with the privileges of the
user running system-config-printer. (CVE-2011-2899)

All users of system-config-printer are advised to upgrade to these updated
packages, which contain a backported patch to resolve this issue. Running
instances of system-config-printer must be restarted for this update to
take effect.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

728348 - CVE-2011-2899 system-config-printer: possible arbitrary code execution in pysmb.py due to improper escaping of hostnames

6. Package List:

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/system-config-printer-0.6.116.10-1.6.el4.src.rpm

i386:
system-config-printer-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.i386.rpm

ia64:
system-config-printer-0.6.116.10-1.6.el4.ia64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.ia64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.ia64.rpm

ppc:
system-config-printer-0.6.116.10-1.6.el4.ppc.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.ppc.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.ppc.rpm

s390:
system-config-printer-0.6.116.10-1.6.el4.s390.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.s390.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.s390.rpm

s390x:
system-config-printer-0.6.116.10-1.6.el4.s390x.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.s390x.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.s390x.rpm

x86_64:
system-config-printer-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/system-config-printer-0.6.116.10-1.6.el4.src.rpm

i386:
system-config-printer-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.i386.rpm

x86_64:
system-config-printer-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/system-config-printer-0.6.116.10-1.6.el4.src.rpm

i386:
system-config-printer-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.i386.rpm

ia64:
system-config-printer-0.6.116.10-1.6.el4.ia64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.ia64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.ia64.rpm

x86_64:
system-config-printer-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/system-config-printer-0.6.116.10-1.6.el4.src.rpm

i386:
system-config-printer-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.i386.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.i386.rpm

ia64:
system-config-printer-0.6.116.10-1.6.el4.ia64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.ia64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.ia64.rpm

x86_64:
system-config-printer-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-debuginfo-0.6.116.10-1.6.el4.x86_64.rpm
system-config-printer-gui-0.6.116.10-1.6.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/system-config-printer-0.7.32.10-1.el5_7.1.src.rpm

i386:
system-config-printer-0.7.32.10-1.el5_7.1.i386.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.i386.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.i386.rpm

x86_64:
system-config-printer-0.7.32.10-1.el5_7.1.x86_64.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.x86_64.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/system-config-printer-0.7.32.10-1.el5_7.1.src.rpm

i386:
system-config-printer-0.7.32.10-1.el5_7.1.i386.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.i386.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.i386.rpm

ia64:
system-config-printer-0.7.32.10-1.el5_7.1.ia64.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.ia64.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.ia64.rpm

ppc:
system-config-printer-0.7.32.10-1.el5_7.1.ppc.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.ppc.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.ppc.rpm

s390x:
system-config-printer-0.7.32.10-1.el5_7.1.s390x.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.s390x.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.s390x.rpm

x86_64:
system-config-printer-0.7.32.10-1.el5_7.1.x86_64.rpm
system-config-printer-debuginfo-0.7.32.10-1.el5_7.1.x86_64.rpm
system-config-printer-libs-0.7.32.10-1.el5_7.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-2899.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
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