full-disclosure - [ GLSA 200712-13 ] E2fsprogs: Multiple buffer overflows

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Date: Tue, 18 Dec 2007 21:48:56 +0100
From: Robert Buchholz <rbu@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200712-13 ] E2fsprogs: Multiple buffer
	overflows

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Gentoo Linux Security Advisory                           GLSA 200712-13
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: E2fsprogs: Multiple buffer overflows
      Date: December 18, 2007
      Bugs: #201546
        ID: 200712-13

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Synopsis
========

Multiple heap-based buffer overflows in E2fsprogs could result in the
execution of arbitrary code.

Background
==========

E2fsprogs provides utilities for use with the ext2 and ext3 file
systems including the libext2fs library that allows user-level programs
to manipulate an ext2 or ext3 file system.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  sys-fs/e2fsprogs      < 1.40.3                          >= 1.40.3

Description
===========

Rafal Wojtczuk (McAfee AVERT Research) discovered multiple integer
overflows in libext2fs, that are triggered when processing information
from within the file system, resulting in heap-based buffer overflows.

Impact
======

An attacker could entice a user to process a specially-crafted ext2 or
ext3 file system image (with tools linking against libext2fs, e.g.
fsck, forensic tools or Xen's pygrub), possibly resulting in the
execution of arbitrary code with the privileges of the user running the
application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All E2fsprogs users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-fs/e2fsprogs-1.40.3"

References
==========

  [ 1 ] CVE-2007-5497
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5497

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200712-13.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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