Home / mailings [gentoo-announce] [ GLSA 200910-01 ] Wget: Certificate validation error
Posted on 20 October 2009
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Gentoo Linux Security Advisory GLSA 200910-01
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http://security.gentoo.org/
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Severity: Normal
Title: Wget: Certificate validation error
Date: October 20, 2009
Bugs: #286058
ID: 200910-01
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Synopsis
========
An error in the X.509 certificate handling of Wget might enable remote
attackers to conduct man-in-the-middle attacks.
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 >= 1.12
Description
===========
The vendor reported that Wget does not properly handle Common Name (CN)
fields in X.509 certificates that contain an ASCII NUL ( ) character.
Specifically, the processing of such fields is stopped at the first
occurrence of a NUL character. This type of vulnerability was recently
discovered by Dan Kaminsky and Moxie Marlinspike.
Impact
======
A remote attacker might employ a specially crafted X.509 certificate,
containing a NUL character in the Common Name field to conduct
man-in-the-middle attacks on SSL connections made using Wget.
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
References
==========
[ 1 ] CVE-2009-3490
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3490
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200910-01.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 2009 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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