(Conectiva Issues Fix) Libxml2 URL Parsing and DNS Resolution Buffer Overflows May Let Remote Users Execute Arbitrary Code
|
|
SecurityTracker Alert ID: 1012262 |
|
SecurityTracker URL: http://securitytracker.com/id/1012262
|
|
CVE Reference:
CAN-2004-0989
(Links to External Site)
|
Date: Nov 19 2004
|
Impact:
Denial of service via network, Execution of arbitrary code via network, User access via network
|
Fix Available: Yes Vendor Confirmed: Yes
|
Version(s): 2.6.12, 2.6.13
|
Description:
Some buffer overflow vulnerabilities were reported in Libxml2. A remote user may be able to execute arbitrary code on the target system, depending on how the Libxml2 library is used.
sean reported that a remote user can create a specially crafted FTP URL that, when loaded by the target user, will trigger a buffer overflow. The flaw resides in the xmlNanoFTPScanURL() function in 'nanoftp.c'.
It is also reported that a remote user can create an FTP proxy URL that, when loaded, will also trigger a buffer overflow. The flaw resides in the xmlNanoFTPScanProxy() function in 'nanoftp.c'.
In addition, there are several buffer overflows in the resolution of domain names. A remote user with control of a DNS server or the ability to spoof a DNS server can trigger these buffer overflows to execute arbitrary code on the target user's system.
|
Impact:
A remote user may be able to execute arbitrary code on the target system. The specific impact depends on how the Libxml2 library is used.
|
Solution:
Conectiva has released a fix.
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libxml-1.8.17-58912U10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libxml2-2.6.9-57970U10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-devel-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-devel-static-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-doc-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-devel-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-devel-static-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-doc-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-python-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/libxml-1.8.17-12238U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-1.8.17-12238U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-devel-1.8.17-12238U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-devel-static-1.8.17-12238U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-doc-1.8.17-12238U90_1cl.i386.rpm
|
Vendor URL: www.xmlsoft.org/ (Links to External Site)
|
Cause:
Boundary error
|
Underlying OS:
Linux (Conectiva)
|
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Date: Thu, 18 Nov 2004 09:33:08 -0200
Subject: [Conectiva-updates] [CLA-2004:890] Conectiva Security Announcement
|
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- --------------------------------------------------------------------------
CONECTIVA LINUX SECURITY ANNOUNCEMENT
- --------------------------------------------------------------------------
PACKAGE : libxml2
SUMMARY : Fixes for libxml2 buffer overflow vulnerabilities
DATE : 2004-11-18 09:20:00
ID : CLA-2004:890
RELEVANT
RELEASES : 9, 10
- -------------------------------------------------------------------------
DESCRIPTION
The XML C library[1] (libxml2) is used by many programs to load and
save extensible data structures or to manipulate several kinds of XML
files.
This update fixes a buffer overflow vulnerability[2,3] in the URI
parsing code found by "infamous41md" at the nanoftp and nanohttp
modules of libxml2. An attacker may exploit this vulnerability to
execute arbitrary code with the privileges of the user running an
affected application. Depending of the scenario where this
application is used, this vulnerability can be remotely exploitable.
SOLUTION
It is recommended that all libxml/libxml2 users upgrade their
packages.
REFERENCES
1.http://xmlsoft.org
2.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0989
3.http://www.securityfocus.com/archive/1/379383
UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libxml-1.8.17-58912U10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/SRPMS/libxml2-2.6.9-57970U10_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-devel-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-devel-static-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml-doc-1.8.17-58912U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-devel-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-devel-static-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-doc-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/10/RPMS/libxml2-python-2.6.9-57970U10_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/libxml-1.8.17-12238U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-1.8.17-12238U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-devel-1.8.17-12238U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-devel-static-1.8.17-12238U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml-doc-1.8.17-12238U90_1cl.i386.rpm
ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:
- run: apt-get update
- after that, execute: apt-get upgrade
Detailed instructions regarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en
- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en
- -------------------------------------------------------------------------
Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com
- -------------------------------------------------------------------------
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org
iD8DBQFBnIhz42jd0JmAcZARAlobAKCLG+0SGkjSZMBCMc9tpCRqJ7G60QCggEbf
GoYeRPSU6ZVLxcPjxKXlZ6g=
=2pdI
-----END PGP SIGNATURE-----
______________________________________________________________________
subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
|
|
