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Gentoo: 201110-10: Wget: User-assisted file creation or overwrite Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
Gentoo Insecure usage of server provided filenames may allow the creation oroverwriting of local files.
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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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