__________________________________________________________

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

                             INFORMATION BULLETIN

                         Linux Kernel VFS Vulnerability
                             [Security Focus 27280]

January 17, 2008 22:00 GMT                                        Number S-121
[REVISED 30 Jan 2008]
[REVISED 4 Feb 2008]
______________________________________________________________________________
PROBLEM:       The Linux kernel is prone to an unauthorized file-access 
               vulnerability affecting the VFS (Virtual Filesystem) module. 
			   
PLATFORM:      rPath rPath Linux 1 
               rPath Appliance Platform Linux Service 1 
               Linux kernel 
			     2.6.23 .7 
			     2.6.23 .6 
			     2.6.23 .5 
			     2.6.23 .4 
			     2.6.23 .3 
			     2.6.23 .2 
			     2.6.23 -rc2 
			     2.6.23 -rc1 
			     2.6.23 
			     2.6.22 7 
			     2.6.22 1 
			     2.6.22 .8 
			     2.6.22 .6 
			     2.6.22 .5 
			     2.6.22 .4 
			     2.6.22 .3 
                 2.6.22 .11 
				 2.6.22 
				 2.6.21 4 
			     2.6.21 .7 
			     2.6.21 .6 
			     2.6.21 .2 
			     2.6.21 .1 
			     2.6.21 
				 2.6.20 .9 
				 2.6.20 .8 
				 2.6.20 .5 
                 2.6.20 .4 
				 2.6.20 .15 
				 2.6.20 
				 2.6.19 1 
				 2.6.19 .2 
				 2.6.19 .1 
				 2.6.19 -rc4 
				   + Trustix Secure Enterprise Linux 2.0 
			       + Trustix Secure Linux 2.2 
				   + Trustix Secure Linux 2.1 
			       + Trustix Secure Linux 2.0 
			   Linux kernel 2.6.19 -rc3 
			     2.6.19 -rc2 
				 2.6.19 -rc1 
				   + Trustix Secure Enterprise Linux 2.0 
				   + Trustix Secure Linux 2.2 
			       + Trustix Secure Linux 2.1 
				   + Trustix Secure Linux 2.0 
			     2.6.18 .4 
				 2.6.18 .3 
				 2.6.18 .1 
				 2.6.18 
				 2.6.17 .8 
                 2.6.17 .7 
				 2.6.17 .6 
				 2.6.17 .5 
				 2.6.17 .3 
				 2.6.17 .2 
				 2.6.17 .14 
				 2.6.17 .13 
				 2.6.17 .12 
			     2.6.17 .11 
				 2.6.17 .10 
				 2.6.17 .1 
				 2.6.17 -rc5 
				 2.6.17 
                 2.6.16 27 
				 2.6.16 13 
				 2.6.16 .9 
				 2.6.16 .7 
				   + Trustix Secure Enterprise 
               Linux 2.0 
			       + Trustix Secure Linux 2.2 
				   + Trustix Secure Linux 2.1 
                   + Trustix Secure Linux 2.0 
				 2.6.16 .23 
				 2.6.16 .19 
				 2.6.16 .12 
				 2.6.16 .11 
                 2.6.16 .1 
				 2.6.16 -rc1  
                 2.6.16 
				 2.6.15 .4 
				 2.6.15 .3 
				 2.6.15 .2 
				 2.6.15 .1 
				 2.6.15 -rc3 
			     2.6.15 -rc2 
				 2.6.15 -rc1 
				 2.6.15 
				   + Trustix Secure Enterprise Linux 2.0 
				   + Trustix Secure Linux 2.2 
			       + Trustix Secure Linux 2.1 
				   + Trustix Secure Linux 2.0 
			     2.6.14 .5 
				 2.6.14 .4 
				 2.6.14 .3 
				 2.6.14 .2 
				 2.6.14 .1 
                 2.6.14 -rc4 
				 2.6.14 -rc3  
                 2.6.14 -rc2 
				 2.6.14 -rc1 
				 2.6.14 
				 2.6.13 .4 
				 2.6.13 .3 
				 2.6.13 .2 
                 2.6.13 .1 
				 2.6.13 -rc7  
                 2.6.13 -rc6 
				 2.6.13 -rc4 
				 2.6.13 -rc1 
                 2.6.13 
				   + Trustix Secure Enterprise Linux 2.0
				   + Trustix Secure Linux 2.2 
			       + Trustix Secure Linux 2.1 
				   + Trustix Secure Linux 2.0 
			     2.6.12 .6 
				 2.6.12 .5 
                 2.6.12 .4 
				 2.6.12 .3 
                 2.6.12 .22 
				 2.6.12 .2 
				 2.6.12 .12 
				 2.6.12 .1 
				 2.6.12 -rc5 
				 2.6.12 -rc4 
			     2.6.12 -rc1 
			     2.6.12 
                 2.6.11 .8 
				 2.6.11 .7 
				 2.6.11 .6 
				 2.6.11 .5 
				 2.6.11 .4 
				 2.6.11 .12 
                 2.6.11 .11 
				 2.6.11 -rc4 
                 2.6.11 -rc3 
				 2.6.11 -rc2 
				 2.6.11 
				   + Trustix Secure Enterprise Linux 2.0 
				   + Trustix Secure Linux 2.2 
                   + Trustix Secure Linux 2.1 
				   + Trustix Secure Linux 2.0 
				 2.6.10 rc2 
				 2.6.10 
				 2.6.10 
				 2.6.9 
				 2.6.8 rc3 
				 2.6.8 rc2 
                 2.6.8 rc1 
				   + Ubuntu Ubuntu Linux 4.1 ppc 
				   + Ubuntu Ubuntu Linux 4.1 ia64 
			       + Ubuntu Ubuntu Linux 4.1 ia32   
				 2.6.8 
				 2.6.7 rc1 
				 2.6.7 
				 2.6.6 rc1 
				 2.6.6 
				 2.6.5 
				 2.6.4 
				 2.6.3 
				 2.6.2 
				 2.6.1 -rc2 
				 2.6.1 -rc1 
				 2.6.1 
				 2.6 .10 
				 2.6 -test9-CVS 
				 2.6 -test9 
			     2.6 -test8 
				 2.6 -test7 
				 2.6 -test6 
				 2.6 -test5 
				 2.6 -test4 
			     2.6 -test3 
				 2.6 -test2 
				 2.6 -test11 
				 2.6 -test10 
				 2.6 -test1 
			     2.6 
				 2.6.8.1 
                 2.6.23.10 
				 2.6.23.1 
				 2.6.23.09 
				 2.6.22-rc7 
				 2.6.22-rc1  
                 2.6.21-RC6 
				 2.6.21-RC5 
				 2.6.21-RC4 
                 2.6.21-RC3 
				 2.6.21-RC3 
				 2.6.20.3 
				 2.6.20.2 
				 2.6.20.13 
				 2.6.20.11 
				 2.6.20.1 
				 2.6.20-rc2 
                 2.6.20-2 
				 2.6.18-8.1.8.el5 
				 2.6.18 
				 2.6.15.5 
				 2.6.15.11 
                 2.6.15-27.48 
				 2.6.11.4 
			   Debian GNU/Linux 4.0 (etch)
			   Red Hat Desktop (v. 4)  
               Red Hat Enterprise Linux AS, ES, WS (v. 4)
			    
DAMAGE:        A local attacker can exploit this issue to access arbitrary 
               files on the affected comptuer and gain elevated privileges. 
SOLUTION:      Upgrade to the appropriate version. 
______________________________________________________________________________
VULNERABILITY  The risk is MEDIUM. A loal attacker can exploit this issue to 
ASSESSMENT:    access arbitrary files on the affected computer. Successfully 
               exploiting this issue may grant the attacker elevated 
               privileges on affected computers. 
______________________________________________________________________________
LINKS: 
 CIAC BULLETIN:      http://www.ciac.org/ciac/bulletins/s-121.shtml 
 ORIGINAL BULLETIN:  http://www.securityfocus.com/bid/27280/discuss 
 ADDITIONAL LINKS:   http://www.debian.org/security/2007/dsa-1479
                     http://rhn.redhat.com/errata/RHSA-2008-0055.html
 CVE:                http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= 
                     CVE-2008-0001 
______________________________________________________________________________
REVISION HISTORY:
01/30/2008 - revised S-121 to add a link to Debian Security Advisory DSA-1479-1 for
             Debian GNU/Linux 4.0 (etch).
02/04/2008 - revised S-121 to add a link to Red Hat RHSA-2008:0055-11 for Red Hat
             Desktop (v. 4) and Red Hat Enterprise Linux AS, ES, WS (v. 4).




[***** Start Security Focus 27280 *****]

Linux Kernel VFS Unauthorized File Access Vulnerability

The Linux kernel is prone to an unauthorized file-access vulnerability affecting 
the VFS (Virtual Filesystem) module.

A local attacker can exploit this issue to access arbitrary files on the affected 
computer. Successfully exploiting this issue may grant the attacker elevated 
privileges on affected computers. Other attacks are also possible.

This issue affects kernel versions prior to 2.6.23.14. 

Bugtraq ID:  27280  
Class:  Design Error  
CVE:  CVE-2008-0001
 
Remote:  No  
Local:  Yes  
Published:  Jan 14 2008 12:00AM  
Updated:  Jan 17 2008 04:49PM  


[***** End Security Focus 27280 *****]
_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of Security Focus 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
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