The OpenNET Project
 
Search (keywords):  SOFT ARTICLES TIPS & TRICKS SECURITY
LINKS NEWS MAN DOCUMENTATION


[ GLSA 200611-01 ] Screen: UTF-8 character handling vulnerability


<< Previous INDEX Search src / Print Next >>
Date: Fri, 03 Nov 2006 14:30:26 +0100
From: Matthias Geerdsen <vorlon@gentoo.org.>
To: [email protected]
Subject: [ GLSA 200611-01 ] Screen: UTF-8 character handling vulnerability
X-Enigmail-Version: 0.94.0.0
Content-Type: multipart/signed; micalg=pgp-sha1;
 protocol="application/pgp-signature";
 boundary="------------enig39584AEFB8551CBB0B77EFC8"
X-Virus-Scanned: antivirus-gw at tyumen.ru

This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig39584AEFB8551CBB0B77EFC8
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: quoted-printable

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200611-01
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                             http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


   Severity: High
      Title: Screen: UTF-8 character handling vulnerability
       Date: November 03, 2006
       Bugs: #152770
         ID: 200611-01

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


Synopsis
=3D=3D=3D=3D=3D=3D=3D=3D

Screen contains an error in its UTF-8 character handling code that
would allow a remote Denial of Service or possibly the remote execution
of arbitrary code.

Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Screen is a full-screen window manager that multiplexes a physical
terminal between several processes, typically interactive shells.

Affected packages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

     -------------------------------------------------------------------
      Package          /  Vulnerable  /                      Unaffected
     -------------------------------------------------------------------
   1  app-misc/screen       < 4.0.3                            >=3D 4.0.3=


Description
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

cstone and Richard Felker discovered a flaw in Screen's UTF-8 combining
character handling.

Impact
=3D=3D=3D=3D=3D=3D

The vulnerability can be exploited by writing a special string of
characters to a Screen window. A remote attacker could cause a Denial
of Service or possibly execute arbitrary code with the privileges of
the user running Screen through a program being run inside a Screen
session, such as an IRC client or a mail client.

Workaround
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

There is no known workaround at this time.

Resolution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

All Screen users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=3Dapp-misc/screen-4.0.3"


References
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

   [ 1 ] CVE-2006-4573
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2006-4573

Availability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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

   http://security.gentoo.org/glsa/glsa-200611-01.xml

Concerns?
=3D=3D=3D=3D=3D=3D=3D=3D=3D

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
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=3D=3D=3D=3D=3D=3D=3D

Copyright 2006 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


--------------enig39584AEFB8551CBB0B77EFC8
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)

iD8DBQFFS0R3Gc/RGrFqUYMRAkUmAJwOS9bMqUHAFlokjl3j+mgSD52l2wCbBN51
cZ7qS5P3sLC+TbP/fE+M8kY=
=FN/3
-----END PGP SIGNATURE-----

--------------enig39584AEFB8551CBB0B77EFC8--


<< Previous INDEX Search src / Print Next >>



Партнёры:
PostgresPro
Inferno Solutions
Hosting by Hoster.ru
Хостинг:

Закладки на сайте
Проследить за страницей
Created 1996-2024 by Maxim Chirkov
Добавить, Поддержать, Вебмастеру