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Linux Kernel 2.4 / 2.6 Denial Of Service

Linux Kernel 2.4 / 2.6 Denial Of Service
Posted Apr 14, 2011
Authored by Timo Warns | Site pre-cert.de

PRE-CERT Security Advisory - The Linux kernel contains a vulnerability that may lead to a denial-of-service due to corrupted partition tables on storage devices. 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 EFI GUID partition tables contains a buffer overflow bug that allows to cause kernel oops resulting in a denial of service.

tags | advisory, denial of service, overflow, kernel
systems | linux
advisories | CVE-2011-1577
SHA-256 | c706d8f1111e5e6772c99b27b909ea43d70a53491a02c722e6e124b5baa947eb

Linux Kernel 2.4 / 2.6 Denial Of Service

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PRE-CERT Security Advisory
==========================

* Advisory: PRE-SA-2011-03
* Released on: 13 Apr 2011
* Last updated on: 13 Apr 2011
* Affected product: Linux Kernel 2.4 and 2.6
* Impact: denial-of-service
* Origin: storage devices
* Credit: Timo Warns (PRESENSE Technologies GmbH)
* CVE Identifier: CVE-2011-1577


Summary
-------

The Linux kernel contains a vulnerability that may lead to
a denial-of-service due to corrupted partition tables on storage
devices.

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 EFI GUID partition tables contains a buffer
overflow bug that allows to cause kernel oops resulting in a denial of
service.


Workaround
----------

Compile and use a kernel that does not evaluate EFI GUID partition
tables. The corresponding configuration key is CONFIG_EFI_PARTITION.


Solution
--------

A patch is available at
http://www.spinics.net/lists/mm-commits/msg83274.html


References
----------

When further information becomes available, this advisory will be
updated. The most recent version of this advisory is available at:

http://www.pre-cert.de/advisories/PRE-SA-2011-03.txt


Contact
-------

PRE-CERT can be reached under precert@pre-secure.de. For PGP key
information, refer to http://www.pre-cert.de/.
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