Linux Kernel OSF Partition Table Buffer Overflow Lets Local Users Obtain Information
SecurityTracker Alert ID: 1025225|
SecurityTracker URL: http://securitytracker.com/id/1025225
(Links to External Site)
Date: Mar 17 2011
Disclosure of system information, Disclosure of user information|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): 2.4.x, 2.6.x|
A vulnerability was reported in the Linux Kernel. A local user can obtain information from kernel memory.|
A local user can create a storage device with specially crafted OSF partition tables. When the kernel automatically evaluates the partition tables, a buffer overflow may occur and data from kernel heap space may leak to userspace.
Timo Warns (PRESENSE Technologies GmbH) reported this vulnerability.
A local user can obtain kernel memory contents.|
The vendor has issued a fix (2.6.38).|
Vendor URL: www.kernel.org/ (Links to External Site)
This archive entry has one or more follow-up message(s) listed below.|
Source Message Contents
Subject: [PRE-SA-2011-02] Information disclosure vulnerability in the OSF partition handling code of the Linux kernel|
PRE-CERT Security Advisory
* Advisory: PRE-SA-2011-02
* Released on: 16 Mar 2011
* Last updated on: 16 Mar 2011
* Affected product: Linux Kernel 2.4 and 2.6
* Impact: disclosure of sensitive information
* Origin: storage devices
* Credit: Timo Warns (PRESENSE Technologies GmbH)
* CVE Identifier: CVE-2011-1163
The Linux kernel contains a vulnerability that may lead to information
leakage due to corrupted partition tables.
The kernel automatically evaluates partition tables of storage devices.
This happens independently of whether any auto-mounting is enabled or
not. The code for evaluating OSF partition tables contains a buffer
overflow bug that allows to leak data from the kernel heap to userspace.
Compile and use a kernel that does not evaluate OSF partition tables.
The corresponding configuration key is CONFIG_OSF_PARTITION.
The bug has been fixed in Linux kernel 2.6.38.
When further information becomes available, this advisory will be
updated. The most recent version of this advisory is available at:
PRE-CERT can be reached under firstname.lastname@example.org. For PGP key
information, refer to http://www.pre-cert.de/.