[ GLSA 201110-10 ] Wget: User-assisted file creation or overwrite

[Tim Sammut <underling () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 201110-10
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: Wget: User-assisted file creation or overwrite
     Date: October 13, 2011
     Bugs: #329941
       ID: 201110-10

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Synopsis
========

Insecure usage of server provided filenames may allow the creation or
overwriting of local files.

Background
==========

GNU Wget is a free software package for retrieving files using HTTP,
HTTPS and FTP, the most widely-used Internet protocols.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/wget               < 1.12-r2                 >= 1.12-r2

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

It was discovered that Wget was unsafely trusting server-provided
filenames. This allowed attackers to overwrite or create files on the
user's system by sending a redirect from the expected URL to another
URL specifying the targeted file.

Impact
======

An unauthenticated remote attacker may be able to create or overwrite
local files by enticing the user to open an attacker controlled URL,
possibly leading to execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Wget users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/wget-1.12-r2"

NOTE: This is a legacy GLSA. Updates for all affected architectures are
available since September 19, 2010. It is likely that your system is
already no longer affected by this issue.

References
==========

[ 1 ] CVE-2010-2252
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-2252

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

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

 http://security.gentoo.org/glsa/glsa-201110-10.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 () gentoo org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2011 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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