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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel GFS2 Rename Null Pointer Dereference May Let Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1024386
SecurityTracker URL:  http://securitytracker.com/id/1024386
CVE Reference:   CVE-2010-2798   (Links to External Site)
Date:  Sep 2 2010
Impact:   Denial of service via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.6.19-rc1 and later
Description:   A vulnerability was reported in the Linux Kernel. A local user can cause denial of service conditions. A local user may be able to obtain elevated privileges on the target system.

A local user with write access to a GFS2-mounted file system can perform a specially crafted rename operation to trigger a null pointer dereference and cause denial of service conditions or potentially execute arbitrary code on the target system.

The vulnerability resides in gfs2_dirent_find_space() in 'fs/gfs2/dir.c'.

Grant Diffey of CenITex reported this vulnerability.

Impact:   A local user may be able to obtain elevated privileges on the target system.

A local user can cause denial of service conditions on the target system.

Solution:   The vendor has issued a source code fix, available at:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=728a756b8fcd22d80e2dbba8117a8a3aafd3f203

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 2 2010 (Red Hat Issues Fix) Linux Kernel GFS2 Rename Null Pointer Dereference May Let Local Users Gain Elevated Privileges   (bugzilla@redhat.com)
Red Hat has issued a fix for Red Hat Enterprise Linux 5.4 Extended Update Support.
Sep 29 2010 (Red Hat Issues Fix) Linux Kernel GFS2 Rename Null Pointer Dereference May Let Local Users Gain Elevated Privileges   (bugzilla@redhat.com)
Red Hat has issued a fix for Red Hat Enterprise Linux 5.



 Source Message Contents

Date:  Thu, 02 Sep 2010 20:14:21 +0000
Subject:  Linux kernel


CVE-2010-2798 kernel: gfs2: rename causes kernel panic


 
 


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